US4090126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency marker generator
Assignee: Individual
•
Filing: 1976-09-13
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Granted: 1978-05-16
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Expires: 1996-09-13
Abstract
Abstract A frequency marker generator for providing marker pulses corresponding to known frequencies over a wide band of frequencies is disclosed. A signal having a predetermined frequency or known frequency as well as the output unknown frequency or frequencies of the signals from a system under test are both applied to a phase and frequency detector. A sweep generator provides a signal which is variable in frequency over the frequency band of interest, and is applied to the system under test. The phase and frequency detector having two discrete output states provides a transition of its output state when the variable frequency output signal from the system under test passes the predetermined frequency and a differentiator differentiates the output signal from the phase and frequency detector and transmits it through a pair of steering diodes to provide a frequency marker signal which may be recorded separately or mixed in a mixer with the output of the system under test to provide a display of the amplitude versus frequency of the system under test at the predetermined frequency or frequencies.
Inventors
- 👤 Charles Poticha
- 👤 Andrew K. Laird
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:03
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/28; G01R23/00; G01R23/02; G01R23/14; G01R31/00; G01R31/28; G01R31/282; G01R31/2825
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
127 words
A frequency marker system for providing frequency marker signals to the output of a system under test comprising: reference frequency generator means for providing a signal having a predetermined frequency, phase and frequency detector means coupled to the output of said reference frequency generator means and the system under test, said phase and frequency detector means having two discrete output states, and being operative to provide a transition in output state when the frequency of the output of the signal from the system under test passes the predetermined frequency, and differentiator means coupled to the output of said phase and frequency detector means and being operative to provide a marker signal in response to the transition in the output state of said phase and frequency detector means.
Claim 2
Dependent Claim
127 words
A frequency marker system for providing frequency marker signals to the output of a system under test comprising: reference frequency generator means for providing a signal having a predetermined frequency, phase and frequency detector means coupled to the output of said reference frequency generator means and the system under test, said phase and frequency detector means having two discrete output states, and being operative to provide a transition in output state when the frequency of the output of the signal from the system under test passes the predetermined frequency, and differentiator means coupled to the output of said phase and frequency detector means and being operative to provide a marker signal in response to the transition in the output state of said phase and frequency detector means.
Claim 3
Dependent Claim
59 words
The system as described in claim 1 and further including mixer means coupled to the output of said differentiator means and the output of the system under test for combining the frequency marker pulses with the output of the system under test for providing a marker pulse at the output of the system under test at the predetermined frequency.
Claim 4
Dependent Claim
43 words
The system as described in claim 2 and further including visual display means coupled to the output of said mixer means for providing a visual display of the amplitude output of the system under test and the marker pulses at the predetermined frequency.
Claim 5
Dependent Claim
45 words
The system as described in claim 2 and further including envelope detector means coupled between the output of the system under test and said mixer means for providing an output wave form which is the envelope of the output signal of the system under test.
Claim 6
Dependent Claim
45 words
The system as described in claim 4 and further including visual display means coupled to the output of said mixer means for providing a visual display of the amplitude of the output of the system under test and the marker pulses at the predetermined frequency.
Claim 7
Dependent Claim
77 words
The system as described in claim 1 and wherein said differentiator means provides a marker signal having a first polarity when the frequency of the system under test increases past the predetermined frequency and a marker signal having a second opposite polarity when the frequency of the system under test decreases past the predetermined frequency and further including steering diode means coupled to the output of said differentiator means for providing marker signals having the same polarity.
Claim 8
Dependent Claim
45 words
The system as described in claim 1 and further including sweep generator means coupled to the system under test for providing a sweep signal having a frequency which varies over the range of frequencies within which the system under test is sought to be tested.
Claim 9
Dependent Claim
44 words
The system as described in claim 7 and wherein the frequency of the sweep signal increases and decreases in a predetermined sequence and further including steering diode means coupled to the output of said differentiator means for providing marker signals having the same polarity.
Claim 10
Dependent Claim
86 words
The system as described in claim 1 and further including steering diode means coupled to the output of said differentiator means for providing marker signals having the same polarity, said steering diode means including a pair of diodes each having a cathode and an anode terminal, with the first diode of said pair of diodes having a cathode coupled to the output of said differentiator means and the second diode of said pair of diodes having an anode coupled to the output of said differentiator means.
Claim 11
Dependent Claim
57 words
The system as described in claim 9 wherein said steering diode means further includes an amplifier having a negative input terminal coupled to the anode of said first diode and a positive input terminal coupled to the cathode of said second diode, said amplifier being operative to provide marker signals at its output having the same polarity.
Claim 12
Dependent Claim
123 words
A frequency coincidence detector system comprising: reference frequency generator means for providing a signal having a known predetermined frequency, sweep generator means for providing a sweep signal having an unknown variable frequency which varies over a band of frequencies, phase and frequency detector means coupled to the output of said reference frequency generator means and to the output of said sweep generator means, said phase and frequency detector means having two discrete output states and operative to provide a transition in its output state when the frequency of the sweep signal passes the predetermined frequency, and visual display means coupled to said phase and frequency detector means for providing a visual indication when the frequency of the sweep signal passes the predetermined frequency.
Claim 13
Dependent Claim
123 words
A frequency coincidence detector system comprising: reference frequency generator means for providing a signal having a known predetermined frequency, sweep generator means for providing a sweep signal having an unknown variable frequency which varies over a band of frequencies, phase and frequency detector means coupled to the output of said reference frequency generator means and to the output of said sweep generator means, said phase and frequency detector means having two discrete output states and operative to provide a transition in its output state when the frequency of the sweep signal passes the predetermined frequency, and visual display means coupled to said phase and frequency detector means for providing a visual indication when the frequency of the sweep signal passes the predetermined frequency.
Claim 14
Dependent Claim
59 words
The system as described in claim 11 and further including differentiator means coupled between said phase and frequency detector means and said visual display means and operative to provide a marker signal in response to the transition in output state of said phase and frequency detector means when the frequency of the sweep signal passes the known predetermined frequency.
Claim 15
Dependent Claim
42 words
The system as described in claim 12 and wherein said sweep generator increases and decreases in the band of frequencies and further including, steering diode means coupled to the output of said differentiator means for providing marker signals having the same polarity.
Claim 16
Dependent Claim
30 words
The system as described in claim 11 wherein said reference frequency generator means includes a variable known reference frequency generator means for varying the signal having a known predetermined frequency.
Claim 17
Dependent Claim
29 words
The system as described in claim 11 wherein said reference frequency generator means includes a fixed reference frequency generator means for providing the signal having a known predetermined frequency.
Claim 18
Dependent Claim
61 words
The system as described in claim 14 wherein said reference frequency generator means further includes a fixed reference frequency generator means for alternatively providing the signal having a known predetermined frequency and further including: an adjustable switch means for selecting either the fixed frequency generator means or the variable frequency generator means to provide the signal having a known predetermined frequency.
Claim 19
Independent Claim
157 words
A system for providing a plurality of frequency marker signals each provided by a separate channel and including means for providing a sweep signal having a frequency which varies over a band of frequencies with each channel comprising: reference frequency generator means for providing a signal having a constant predetermined frequency, phase and frequency detector means coupled to the output of said reference frequency generator means and said means for providing a sweep signal, said phase and frequency generator means having two discrete output states and being operative to provide a transition in its output state when the frequency of the sweep signal passes the constant predetermined frequency, and differentiator means coupled to the output of said phase and frequency detector means and being operative to provide a marker signal in response to the transition in output state of said phase and frequency detector means when the frequency of the sweep signal passes the constant predetermined frequency.
Claim 20
Independent Claim
157 words
A system for providing a plurality of frequency marker signals each provided by a separate channel and including means for providing a sweep signal having a frequency which varies over a band of frequencies with each channel comprising: reference frequency generator means for providing a signal having a constant predetermined frequency, phase and frequency detector means coupled to the output of said reference frequency generator means and said means for providing a sweep signal, said phase and frequency generator means having two discrete output states and being operative to provide a transition in its output state when the frequency of the sweep signal passes the constant predetermined frequency, and differentiator means coupled to the output of said phase and frequency detector means and being operative to provide a marker signal in response to the transition in output state of said phase and frequency detector means when the frequency of the sweep signal passes the constant predetermined frequency.
Claim 21
Dependent Claim
105 words
The system as described in claim 17 and wherein each channel is adapted to provide a frequency marker pulse to the output of a system under test and said means for providing a sweep signal is coupled to the input of the system under test and the output of the system under test is coupled to the input of said phase and frequency detector in each channel, and further including, mixer means coupled to the output of each of said channels and further coupled to the output of the system under test for combining the marker pulses with the output of the system under test.
Claim 22
Dependent Claim
81 words
The system as described in claim 18 and further including, an envelope detector means coupled between the output of the system under test and said mixer means for providing an output wave form which is the envelope of the output signal of the system under test, and visual display means coupled to the output of said mixer means for providing a visual display of the frequency marker signals and the envelope of the output wave form of the system under test.
Claim 23
Dependent Claim
80 words
The system as described in claim 17 and wherein each channel is adapted to provide a frequency marker pulse to a system under test and said means for providing a sweep signal in each channel is coupled to the system under test, and further including, mixer means coupled to the output of each of said channels and further coupled to the output of the system under test for combining the marker pulses with the output of the system under test.
Claim 24
Dependent Claim
42 words
The system as described in claim 20 and further including visual display means coupled to the output of said mixer means for providing a visual display of the amplitude of the output of the system under test and the frequency marker signals.
Claim 25
Dependent Claim
38 words
The system as described in claim 17 and wherein each channel further includes steering diode means coupled to the output of the associated differentiator means for providing frequency marker signals by the associated channel having the same polarity.
Claim 26
Dependent Claim
32 words
The system as described in claim 22 wherein the steering diode means of each channel includes circuit means included in the other channels for responding to the signals in all the channels.
Claim 27
Independent Claim
99 words
A system for determining the frequency of an unknown fixed frequency signal provided by an unknown fixed frequency source comprising: variable known reference frequency generator means for providing a variable reference frequency signal; and phase and frequency detector means coupled to the output of both said unknown fixed frequency source and said variable known reference frequency generator means, said phase and frequency detector means having two discrete output states and being operative to provide a transition in output state when the frequency of the output signal of the variable known reference frequency generator means passes the unknown fixed frequency.
Claim 28
Independent Claim
99 words
A system for determining the frequency of an unknown fixed frequency signal provided by an unknown fixed frequency source comprising: variable known reference frequency generator means for providing a variable reference frequency signal; and phase and frequency detector means coupled to the output of both said unknown fixed frequency source and said variable known reference frequency generator means, said phase and frequency detector means having two discrete output states and being operative to provide a transition in output state when the frequency of the output signal of the variable known reference frequency generator means passes the unknown fixed frequency.
Claim 29
Dependent Claim
38 words
The system as described in claim 24 and further including indicator means coupled to the output of said phase and frequency detector means for providing a visual indication of the transition of said phase and frequency detector means.
Claim 30
Dependent Claim
159 words
A frequency marker system for providing frequency marker signals to the input of a system under test comprising: reference frequency generator means for providing a signal having a predetermined frequency; sweep generator means for providing a sweep signal having a frequency which varies over a range of frequencies; phase and frequency detector means coupled to the output of said reference frequency generator means and said sweep generator means, said phase and frequency detector means having two discrete output states and being operative to provide a transition in output state when the frequency of the output of the sweep generator passes the frequency of the reference frequency generator means; said system under test being coupled to the output of said phase and frequency detector means and said sweep generator means, said coupling enabling said system to receive a signal corresponding to the frequency of the output of said reference frequency generator means and the output of said sweep generator means.
Claim 31
Dependent Claim
159 words
A frequency marker system for providing frequency marker signals to the input of a system under test comprising: reference frequency generator means for providing a signal having a predetermined frequency; sweep generator means for providing a sweep signal having a frequency which varies over a range of frequencies; phase and frequency detector means coupled to the output of said reference frequency generator means and said sweep generator means, said phase and frequency detector means having two discrete output states and being operative to provide a transition in output state when the frequency of the output of the sweep generator passes the frequency of the reference frequency generator means; said system under test being coupled to the output of said phase and frequency detector means and said sweep generator means, said coupling enabling said system to receive a signal corresponding to the frequency of the output of said reference frequency generator means and the output of said sweep generator means.
Claim 32
Dependent Claim
64 words
The system as described in claim 26 and further including mixer means coupled between the output of said phase and frequency detector means and said system under test, said mixer means being further coupled between said sweep generator and said system under test for providing a signal to said system under test having a variable frequency and a marker pulse at the predetermined frequency.
Claim 33
Independent Claim
108 words
A system for providing a discrete signal associated with a predetermined fixed frequency comprising: reference frequency generator means for providing a signal having a fixed frequency; signal generator means for providing a signal having a frequency which varies over a range of frequencies; phase and frequency detector means operating in the open loop asynchronous mode and coupled to the output of said reference frequency generator means and said signal generator means, said phase and frequency detector means having two discrete output states and being operative to provide a transition in output state when the frequency of the output signal from the signal generator means passes the predetermined frequency.
Claim 34
Independent Claim
108 words
A system for providing a discrete signal associated with a predetermined fixed frequency comprising: reference frequency generator means for providing a signal having a fixed frequency; signal generator means for providing a signal having a frequency which varies over a range of frequencies; phase and frequency detector means operating in the open loop asynchronous mode and coupled to the output of said reference frequency generator means and said signal generator means, said phase and frequency detector means having two discrete output states and being operative to provide a transition in output state when the frequency of the output signal from the signal generator means passes the predetermined frequency.
Claim 35
Dependent Claim
47 words
The system as described in claim 28 and further including differentiator means coupled to the output of said phase and frequency detector means and being operative to provide a marker signal in response to the transition in the output state of said phase and frequency detector means.
Claim 36
Dependent Claim
108 words
A frequency marker system for providing a frequency marker signal to a prerecorded signal comprising: reference frequency generator means for providing a signal having a predetermined frequency; storage means for storing a plurality of signals; phase and frequency detector means coupled to the output of said reference frequency generator means and the output of said storage device, said phase and frequency detector means having two discrete output states and coupled to operate in the asynchronous mode, and being operative to provide a transition in output state when the frequency of the output of the signal from the storage device passes the predetermined frequency of the reference frequency generator.
Claim 37
Dependent Claim
108 words
A frequency marker system for providing a frequency marker signal to a prerecorded signal comprising: reference frequency generator means for providing a signal having a predetermined frequency; storage means for storing a plurality of signals; phase and frequency detector means coupled to the output of said reference frequency generator means and the output of said storage device, said phase and frequency detector means having two discrete output states and coupled to operate in the asynchronous mode, and being operative to provide a transition in output state when the frequency of the output of the signal from the storage device passes the predetermined frequency of the reference frequency generator.
Claim 38
Dependent Claim
70 words
The system as described in claim 30 and wherein said storage device includes recording means for storing a plurality of recorded signals and further including: playback means coupled between the output of said storage device and the input of said phase and frequency detector means for retrieving said recorded signals from said storage device and playing them to be applied to the input of said phase and frequency detector means.
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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) | 1981-05-15 | 1981-11-14 | 1982-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-15 | 1985-11-14 | 1986-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-15 | 1989-11-14 | 1990-05-16 | $7700.00 | Window Closed / Lapsed |