US3900823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amplifying and processing apparatus for modulated carrier signals
Assignee: Individual
•
Filing: 1973-03-28
•
Granted: 1975-08-19
•
Expires: 1993-03-28
Abstract
Abstract A power amplifying and signal processing system for modulated carrier signals separately processes the amplitude component of the system input signal and the component of frequency or phase or both frequency and phase, and later recombines the separately processed components to provide an output signal. The amplitude and phase transfer functions of the system can be accurately controlled. The input signal is fed to a power amplifier whose output provides the output for the system. The input and output signals of the system are fed by separate paths to a comparator which compares those signals and emits an error signal to a controller. The controller regulates the amplitude and phase, or both, of the power amplifier''s output to null the error signal. One or both of the signal paths to the comparator may have in it a non-linear function generator which acts upon the signal fed by that path to the comparator. The system may also have a frequency translator and phase shifter interposed between the system input terminal and the power amplifier''s input to shift the frequency or phase or both of the signal applied to the power amplifier''s input.
Inventors
- 👤 Nathan O Sokal
- 👤 Alan D Sokal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:45
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/22; H03F; H03F1/00; H03F1/02; H03F1/0205; H03F1/0211; H03F1/0216; H03F1/32; H03F1/3223; H03F3/00; H03F3/20; H03F3/21; H03F3/217; H03G3/30; H03G3/3036; H03G3/3042
Claims Analysis
Total Claims: 130
Claim 1
Independent Claim
213 words
In a signal processing system of the type having 1. a system input terminal for receiving the signal to be processed, 2. a system output terminal at which the processed signal is provided, 3. a power amplifier having its output fed to the system output terminal, 4. means coupling the system input terminal to the input of the power amplifier, 5. control means for controlling the amplitude of the output of the power amplifier, 6. a differential amplifier having its output connected to the control means and emitting an error signal thereto in response to the input signals applied to the differential amplifier, 7. means providing a first signal path connecting the system input terminal to a first input of the differential amplifier, the first signal path having in it an amplitude detector, 8. means for sensing the output of the power amplifier and providing an electrical signal related thereto, and 9. means providing a second signal path connecting the output sensing means to second input of the differential amplifier, the second signal path having in it an amplitude detector, the improvement wherein at least one of the first and second signal paths has a nonlinear function generator in it which acts upon the signal fed by that path to the differential amplifier.
Claim 2
Dependent Claim
213 words
In a signal processing system of the type having 1. a system input terminal for receiving the signal to be processed, 2. a system output terminal at which the processed signal is provided, 3. a power amplifier having its output fed to the system output terminal, 4. means coupling the system input terminal to the input of the power amplifier, 5. control means for controlling the amplitude of the output of the power amplifier, 6. a differential amplifier having its output connected to the control means and emitting an error signal thereto in response to the input signals applied to the differential amplifier, 7. means providing a first signal path connecting the system input terminal to a first input of the differential amplifier, the first signal path having in it an amplitude detector, 8. means for sensing the output of the power amplifier and providing an electrical signal related thereto, and 9. means providing a second signal path connecting the output sensing means to second input of the differential amplifier, the second signal path having in it an amplitude detector, the improvement wherein at least one of the first and second signal paths has a nonlinear function generator in it which acts upon the signal fed by that path to the differential amplifier.
Claim 3
Independent Claim
12 words
a system output terminal at which the linearly amplified signal is provided,
Claim 4
Independent Claim
12 words
a system output terminal at which the linearly amplified signal is provided,
Claim 5
Independent Claim
12 words
a system output terminal at which the linearly amplified signal is provided,
Claim 6
Independent Claim
12 words
a system output terminal at which the linearly amplified signal is provided,
Claim 7
Independent Claim
12 words
a system output terminal at which the linearly amplified signal is provided,
Claim 8
Independent Claim
12 words
a system output terminal at which the linearly amplified signal is provided,
Claim 9
Dependent Claim
61 words
a phase detector having a different one of its inputs coupled to the system input terminal and to the system output terminal, the phase detector emitting a signal to the means for controlling the variable phase shifter which governs the amount by which the output signal of the variable phase shifter is shifted in phase with respect to the input thereof.
Claim 10
Dependent Claim
61 words
a phase detector having a different one of its inputs coupled to the system input terminal and to the system output terminal, the phase detector emitting a signal to the means for controlling the variable phase shifter which governs the amount by which the output signal of the variable phase shifter is shifted in phase with respect to the input thereof.
Claim 11
Independent Claim
11 words
a system output terminal at which the processed signal is provided,
Claim 12
Independent Claim
11 words
a system output terminal at which the processed signal is provided,
Claim 13
Independent Claim
11 words
a system output terminal at which the processed signal is provided,
Claim 14
Independent Claim
11 words
a system output terminal at which the processed signal is provided,
Claim 15
Dependent Claim
57 words
The improved signal processing system according to claim 1, including the further improvement wherein the means coupling the system input terminal to the input of the power amplifier includes a frequency translator which emits a signal to the power amplifier whose frequency is related to but different from that of the signal at the system input terminal.
Claim 16
Independent Claim
12 words
a system output terminal at which the linearly amplified signal is provided,
Claim 17
Independent Claim
12 words
a system output terminal at which the linearly amplified signal is provided,
Claim 18
Independent Claim
11 words
a system output terminal at which the processed signal is provided,
Claim 19
Independent Claim
11 words
a system output terminal at which the processed signal is provided,
Claim 20
Dependent Claim
12 words
a power amplifier having its output fed to the system output terminal,
Claim 21
Dependent Claim
12 words
a power amplifier having its output fed to the system output terminal,
Claim 22
Dependent Claim
39 words
The improved signal processing system according to claim 1, including the further improvement wherein the means coupling the system input terminal to the input power amplifier includes a variable phase shifter and wherein the signal processing system further includes
Claim 23
Dependent Claim
22 words
a power amplifier having its input connected to the system input terminal and having its output connected to the system output terminal,
Claim 24
Dependent Claim
22 words
a power amplifier having its input connected to the system input terminal and having its output connected to the system output terminal,
Claim 25
Dependent Claim
12 words
a power amplifier having its output fed to the system output terminal,
Claim 26
Dependent Claim
12 words
a power amplifier having its output fed to the system output terminal,
Claim 27
Dependent Claim
12 words
a power amplifier having its output fed to the system output terminal,
Claim 28
Dependent Claim
12 words
a power amplifier having its output fed to the system output terminal,
Claim 29
Dependent Claim
22 words
a power amplifier having its input connected to the system input terminal and having its output connected to the system output terminal,
Claim 30
Dependent Claim
22 words
a power amplifier having its input connected to the system input terminal and having its output connected to the system output terminal,
Claim 31
Dependent Claim
22 words
a power amplifier having its input connected to the system input terminal and having its output connected to the system output terminal,
Claim 32
Dependent Claim
22 words
a power amplifier having its input connected to the system input terminal and having its output connected to the system output terminal,
Claim 33
Dependent Claim
22 words
a power amplifier having its input connected to the system input terminal and having its output connected to the system output terminal,
Claim 34
Dependent Claim
22 words
a power amplifier having its input connected to the system input terminal and having its output connected to the system output terminal,
Claim 35
Dependent Claim
24 words
a first signal path having its input connected to the system input terminal, the first signal path having in it a first amplitude detector,
Claim 36
Dependent Claim
24 words
a first signal path having its input connected to the system input terminal, the first signal path having in it a first amplitude detector,
Claim 37
Dependent Claim
42 words
comparison means for providing an error signal indicative of the difference between the amplitude of the signal at the system input terminal and the arithmetic product of the amplitude of the signal at the system output terminal and a constant factor, and
Claim 38
Dependent Claim
42 words
comparison means for providing an error signal indicative of the difference between the amplitude of the signal at the system input terminal and the arithmetic product of the amplitude of the signal at the system output terminal and a constant factor, and
Claim 39
Dependent Claim
42 words
comparison means for providing an error signal indicative of the difference between the amplitude of the signal at the system input terminal and the arithmetic product of the amplitude of the signal at the system output terminal and a constant factor, and
Claim 40
Dependent Claim
42 words
comparison means for providing an error signal indicative of the difference between the amplitude of the signal at the system input terminal and the arithmetic product of the amplitude of the signal at the system output terminal and a constant factor, and
Claim 41
Dependent Claim
9 words
In a signal processing system of the type having
Claim 42
Dependent Claim
9 words
In a signal processing system of the type having
Claim 43
Dependent Claim
13 words
means coupling the system input terminal to the input of the power amplifier,
Claim 44
Dependent Claim
13 words
means coupling the system input terminal to the input of the power amplifier,
Claim 45
Dependent Claim
13 words
means coupling the system input terminal to the input of the power amplifier,
Claim 46
Dependent Claim
13 words
means coupling the system input terminal to the input of the power amplifier,
Claim 47
Dependent Claim
42 words
comparison means for providing an error signal indicative of the difference between the amplitude of the signal at the system input terminal and the arithmetic product of the amplitude of the signal at the system output terminal and a constant factor, and
Claim 48
Dependent Claim
42 words
comparison means for providing an error signal indicative of the difference between the amplitude of the signal at the system input terminal and the arithmetic product of the amplitude of the signal at the system output terminal and a constant factor, and
Claim 49
Dependent Claim
13 words
means coupling the system input terminal to the input of the power amplifier,
Claim 50
Dependent Claim
13 words
means coupling the system input terminal to the input of the power amplifier,
Claim 51
Dependent Claim
89 words
control means responsive to the error signal emitted by the comparison means, the control means governing the amplitude of the output of the power amplifier in accordance with the error signal, the improvement wherein the control means comprises a. means providing a d.c. supply voltage to at least one stage of the power amplifier, and b. a dissipative direct-coupled regulator disposed in the d.c. supply voltage path to those stages of the power amplifier, the output of the regulator being governed by the error signal from the comparison means.
Claim 52
Dependent Claim
89 words
control means responsive to the error signal emitted by the comparison means, the control means governing the amplitude of the output of the power amplifier in accordance with the error signal, the improvement wherein the control means comprises a. means providing a d.c. supply voltage to at least one stage of the power amplifier, and b. a dissipative direct-coupled regulator disposed in the d.c. supply voltage path to those stages of the power amplifier, the output of the regulator being governed by the error signal from the comparison means.
Claim 53
Dependent Claim
13 words
control means for controlling the amplitude of the output of the power amplifier,
Claim 54
Dependent Claim
13 words
control means for controlling the amplitude of the output of the power amplifier,
Claim 55
Dependent Claim
13 words
control means for controlling the amplitude of the output of the power amplifier,
Claim 56
Dependent Claim
13 words
control means for controlling the amplitude of the output of the power amplifier,
Claim 57
Dependent Claim
9 words
In a signal processing system of the type having
Claim 58
Dependent Claim
9 words
In a signal processing system of the type having
Claim 59
Dependent Claim
148 words
control means responsive to the error signal of the comparison means, the control means governing the amplitude of the power amplifier''s output in accordance with the error signal, the improvement wherein the control means comprises a. means providing a d.c. supply voltage to at least one stage of the power amplifier, b. an a.c.-coupled modulator disposed in the path from the d.c. voltage supply means to those stages of the power amplifier, the a.c.-coupled modulator being responsive to the error signal of the comparison means, c. a switch connected in the path from the d.c. voltage supply means to those stages of the power amplifier, the switch governing the application of the d.c. supply voltage to the one or more stages, and d. a modulator governing the operation of the switch, the modulator responding to the error signal by controlling the duty cycle at which the switch operates.
Claim 60
Dependent Claim
148 words
control means responsive to the error signal of the comparison means, the control means governing the amplitude of the power amplifier''s output in accordance with the error signal, the improvement wherein the control means comprises a. means providing a d.c. supply voltage to at least one stage of the power amplifier, b. an a.c.-coupled modulator disposed in the path from the d.c. voltage supply means to those stages of the power amplifier, the a.c.-coupled modulator being responsive to the error signal of the comparison means, c. a switch connected in the path from the d.c. voltage supply means to those stages of the power amplifier, the switch governing the application of the d.c. supply voltage to the one or more stages, and d. a modulator governing the operation of the switch, the modulator responding to the error signal by controlling the duty cycle at which the switch operates.
Claim 61
Dependent Claim
55 words
control means responsive to the error signal emitted by the comparison means, the control means governing the amplitude of the output of the power amplifier in accordance with the error signal, the improvement wherein the control means comprises apparatus which controls the a.c. cycle duty ratio of at least one stage of the power amplifier.
Claim 62
Dependent Claim
55 words
control means responsive to the error signal emitted by the comparison means, the control means governing the amplitude of the output of the power amplifier in accordance with the error signal, the improvement wherein the control means comprises apparatus which controls the a.c. cycle duty ratio of at least one stage of the power amplifier.
Claim 63
Dependent Claim
29 words
a second signal path having its input connected to the output of the power amplifier, said second signal path having in it a second amplitude detector and an attenuator,
Claim 64
Dependent Claim
29 words
a second signal path having its input connected to the output of the power amplifier, said second signal path having in it a second amplitude detector and an attenuator,
Claim 65
Dependent Claim
13 words
control means for controlling the amplitude of the output of the power amplifier,
Claim 66
Dependent Claim
13 words
control means for controlling the amplitude of the output of the power amplifier,
Claim 67
Dependent Claim
28 words
a differential amplifier having its output connected to the control means and emitting an error signal thereto in response to the input signals applied to the differential amplifier,
Claim 68
Dependent Claim
28 words
a differential amplifier having its output connected to the control means and emitting an error signal thereto in response to the input signals applied to the differential amplifier,
Claim 69
Dependent Claim
7 words
In a linear power amplifying system comprising
Claim 70
Dependent Claim
7 words
In a linear power amplifying system comprising
Claim 71
Dependent Claim
17 words
a differential amplifier having its inputs fed by the outputs of the first and second signal paths,
Claim 72
Dependent Claim
17 words
a differential amplifier having its inputs fed by the outputs of the first and second signal paths,
Claim 73
Dependent Claim
28 words
a differential amplifier having its output connected to the control means and emitting an error signal thereto in response to the input signals applied to the differential amplifier,
Claim 74
Dependent Claim
28 words
a differential amplifier having its output connected to the control means and emitting an error signal thereto in response to the input signals applied to the differential amplifier,
Claim 75
Dependent Claim
28 words
a differential amplifier having its output connected to the control means and emitting an error signal thereto in response to the input signals applied to the differential amplifier,
Claim 76
Dependent Claim
28 words
a differential amplifier having its output connected to the control means and emitting an error signal thereto in response to the input signals applied to the differential amplifier,
Claim 77
Dependent Claim
29 words
means providing a first signal path connecting the system input terminal to a first input of the differential amplifier, the first signal path having in it an amplitude detector,
Claim 78
Dependent Claim
29 words
means providing a first signal path connecting the system input terminal to a first input of the differential amplifier, the first signal path having in it an amplitude detector,
Claim 79
Dependent Claim
29 words
means providing a first signal path connecting the system input terminal to a first input of the differential amplifier, the first signal path having in it an amplitude detector,
Claim 80
Dependent Claim
29 words
means providing a first signal path connecting the system input terminal to a first input of the differential amplifier, the first signal path having in it an amplitude detector,
Claim 81
Dependent Claim
99 words
and control means responsive to the output of the differential amplifier, the control means governing the amplitude of the output signal of the power amplifier in response to the output of the differential amplifier, the improvement wherein a. the attenuator is connected between the output of the power amplifier and the input of the second amplitude detector whereby both the first and second amplitude detectors operate with input signals that are substantially of the same amplitude, and b. the first and second amplitude detectors have substantially matched transfer characteristics over the range of signal amplitudes applied to their inputs.
Claim 82
Dependent Claim
99 words
and control means responsive to the output of the differential amplifier, the control means governing the amplitude of the output signal of the power amplifier in response to the output of the differential amplifier, the improvement wherein a. the attenuator is connected between the output of the power amplifier and the input of the second amplitude detector whereby both the first and second amplitude detectors operate with input signals that are substantially of the same amplitude, and b. the first and second amplitude detectors have substantially matched transfer characteristics over the range of signal amplitudes applied to their inputs.
Claim 83
Dependent Claim
34 words
The improvement in a linear power amplifying system according to claim 6, wherein the control means comprises apparatus which controls the a.c. cycle duty ratio of at least one stage of the power amplifier.
Claim 84
Dependent Claim
19 words
means providing a first signal path connecting the system input terminal to a first input of the differential amplifier,
Claim 85
Dependent Claim
19 words
means providing a first signal path connecting the system input terminal to a first input of the differential amplifier,
Claim 86
Dependent Claim
56 words
The improvement in a linear power amplifying system according to claim 7, wherein the apparatus which controls the a.c. cycle duty ratio causes the centroids of the individual a.c. cycles appearing at the system output terminal to be delayed a constant time from the centroids of the individual a.c. cycles appearing at the system input terminal.
Claim 87
Dependent Claim
17 words
means for sensing the output of the power amplifier and providing an electrical signal related thereto, and
Claim 88
Dependent Claim
17 words
means for sensing the output of the power amplifier and providing an electrical signal related thereto, and
Claim 89
Dependent Claim
17 words
means for sensing the output of the power amplifier and providing an electrical signal related thereto, and
Claim 90
Dependent Claim
17 words
means for sensing the output of the power amplifier and providing an electrical signal related thereto, and
Claim 91
Dependent Claim
17 words
means for sensing the output of the power amplifier and providing an electrical signal related thereto, and
Claim 92
Dependent Claim
17 words
means for sensing the output of the power amplifier and providing an electrical signal related thereto, and
Claim 93
Dependent Claim
75 words
means providing a second signal path connecting the output sensing means to a second input of the differential amplifier, the second signal path having in it an amplitude detector, the improvement wherein the means coupling the system input terminal to the input of the power amplifier includes a frequency translator which emits a signal to the power amplifier whose frequency is related to but different from that of the signal at the system input terminal.
Claim 94
Dependent Claim
75 words
means providing a second signal path connecting the output sensing means to a second input of the differential amplifier, the second signal path having in it an amplitude detector, the improvement wherein the means coupling the system input terminal to the input of the power amplifier includes a frequency translator which emits a signal to the power amplifier whose frequency is related to but different from that of the signal at the system input terminal.
Claim 95
Dependent Claim
61 words
means providing a second signal path connecting the output sensing means to second input of the differential amplifier, the second signal path having in it an amplitude detector, the improvement wherein at least one of the first and second signal paths has a non-linear function generator in it which acts upon the signal fed by that path to the differential amplifier.
Claim 96
Dependent Claim
61 words
means providing a second signal path connecting the output sensing means to second input of the differential amplifier, the second signal path having in it an amplitude detector, the improvement wherein at least one of the first and second signal paths has a non-linear function generator in it which acts upon the signal fed by that path to the differential amplifier.
Claim 97
Dependent Claim
75 words
The improvement in a linear power amplifying system according to claim 6 wherein the control means includes a. means providing a d.c. supply voltage to one or more stages of the power amplifier, and b. a switching regulator comprising i. a switch governing the application of the d.c. voltage to those at least one stage, ii. and a modulator which responds to the output of the differential amplifier by controlling the operation of the switch.
Claim 98
Dependent Claim
47 words
means providing a second signal path connecting the output sensing means to a second input of the differential amplifier, the improvement wherein the means coupling the system input terminal to the input power amplifier includes a variable phase shifter and wherein the signal processing system further includes
Claim 99
Dependent Claim
47 words
means providing a second signal path connecting the output sensing means to a second input of the differential amplifier, the improvement wherein the means coupling the system input terminal to the input power amplifier includes a variable phase shifter and wherein the signal processing system further includes
Claim 100
Dependent Claim
7 words
means for controlling the variable phase shifter
Claim 101
Dependent Claim
7 words
means for controlling the variable phase shifter
Claim 102
Dependent Claim
7 words
In a linear power amplifying system comprising
Claim 103
Dependent Claim
7 words
In a linear power amplifying system comprising
Claim 104
Dependent Claim
7 words
means for controLling the variable phase shifter,
Claim 105
Dependent Claim
7 words
means for controLling the variable phase shifter,
Claim 106
Dependent Claim
3 words
a phase detector,
Claim 107
Dependent Claim
3 words
a phase detector,
Claim 108
Dependent Claim
3 words
a phase detector,
Claim 109
Dependent Claim
3 words
a phase detector,
Claim 110
Dependent Claim
75 words
The improvement in a linear power amplifying system according to claim 10 wherein the control means includes a switching regulator comprising c. a switch connected in the d.c. supply voltage path to the at least one stage of the power amplifier, the switch controlling the application of the d.c. supply voltage to those stages, and d. a modulator governing and operation of the switch in response to the error signal emitted by the comparison means.
Claim 111
Dependent Claim
7 words
In a linear power amplifying system comprising
Claim 112
Dependent Claim
7 words
In a linear power amplifying system comprising
Claim 113
Dependent Claim
20 words
means for coupling the system input terminal and the system output terminal to different inputs of the phase detector, and
Claim 114
Dependent Claim
20 words
means for coupling the system input terminal and the system output terminal to different inputs of the phase detector, and
Claim 115
Dependent Claim
20 words
means for coupling the system input terminal and the system output terminal to different inputs of the phase detector, and
Claim 116
Dependent Claim
20 words
means for coupling the system input terminal and the system output terminal to different inputs of the phase detector, and
Claim 117
Dependent Claim
32 words
the phase detector emitting a signal to the means for controlling the variable phase shifter which determines the amount by which the input signal to the power amplifier is shifted in phase.
Claim 118
Dependent Claim
32 words
the phase detector emitting a signal to the means for controlling the variable phase shifter which determines the amount by which the input signal to the power amplifier is shifted in phase.
Claim 119
Dependent Claim
32 words
the phase detector emitting a signal to the means for controlling the variable phase shifter which determines the amount by which the input signal to the power amplifier is shifted in phase.
Claim 120
Dependent Claim
32 words
the phase detector emitting a signal to the means for controlling the variable phase shifter which determines the amount by which the input signal to the power amplifier is shifted in phase.
Claim 121
Dependent Claim
7 words
In a linear power amplifying system comprising
Claim 122
Dependent Claim
7 words
In a linear power amplifying system comprising
Claim 123
Dependent Claim
56 words
The improvement in a linear power amplifying system according to claim 13, wherein the apparatus which controls the a.c. cycle duty ratio causes the centroids of the individual a.c. cycles appearing at the system output terminal to be delayed a constant time from the centroids of the individual a.c. cycles appearing at the system input terminal.
Claim 124
Dependent Claim
160 words
A linear power amplifying system comprising a. a system input terminal for receiving the signal to be linearly amplified, b. a system output terminal at which the linearly amplified signal is provided, c. a power amplifier having its input connected to the system input terminal and having its output connected to the system output terminal, d. means for linearly combining the signals at the which are present at system input and output terminals, e. detection means fed by the output of the linear combining means, the output of the detection means being indicative of the difference between the amplitude of the signal at the system input terminal and the arithmetic product of the amplitude of the signal at the system output terminal and a constant factor, and f. control means responsive to the output of the detection means, the control means governing the amplitude of the output of the power amplifier in accordance with the output of the detection means.
Claim 125
Dependent Claim
160 words
A linear power amplifying system comprising a. a system input terminal for receiving the signal to be linearly amplified, b. a system output terminal at which the linearly amplified signal is provided, c. a power amplifier having its input connected to the system input terminal and having its output connected to the system output terminal, d. means for linearly combining the signals at the which are present at system input and output terminals, e. detection means fed by the output of the linear combining means, the output of the detection means being indicative of the difference between the amplitude of the signal at the system input terminal and the arithmetic product of the amplitude of the signal at the system output terminal and a constant factor, and f. control means responsive to the output of the detection means, the control means governing the amplitude of the output of the power amplifier in accordance with the output of the detection means.
Claim 126
Dependent Claim
72 words
The linear power amplifying system according to claim 15, wherein the detection means comprises a synchronous detector having as its analog signal input the output of the linear combining means and having as its reference phaSe input a signal of the same frequency as the signal at the system input terminal, and further comprising g. phase control means for controlling the relative phases of the signals applied to the linear combining means.
Claim 127
Dependent Claim
25 words
The linear power amplifying system according to claim 16, wherein the power amplifier includes a variable phase shifter, and wherein the phase control means comprises
Claim 128
Dependent Claim
35 words
The linear power amplifying system according to claim 15, wherein the constant factor in the aforesaid arithmetic product is substantially independent of the relative phase of the signals at the system''s input and output terminals.
Claim 129
Dependent Claim
100 words
The linear power amplifying system according to claim 18, wherein the linear combining means has two or more sections, each of which has means for linearly combining the signals applied to it, and wherein the detection means has two or more sections, each of which has means for detecting signals applied to it, and the detection means further comprises means for combining the outputs of the sections to provide the output of the detection means whereby the detection means yields an output that is substantially independent of the relative phase of the signals at the system''s input and output terminals.
Claim 130
Dependent Claim
127 words
The linear power amplifying system according to claim 19, wherein a first section of the detection means comprises a synchronous detector, the synchronous detector having as its reference phase input a signal whose fundamental frequency component is a linear combination of the signals at the system input and output terminals, and the synchronous detector having as its analog signal input the output of a first section of the linear combining means, and wherein another of the sections of the detection means is associated with a different section of the linear combining means, the combination thereof performing a function substantially equivalent to the function performed by the combination of the aforesaid first sections where one of the input signals to the latter combination is shifted 180* in phase.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |