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US4017800A
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Delinearization circuit
Assignee: Arris Technology Inc
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Filing: 1975-04-29
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Granted: 1977-04-12
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Expires: 1995-04-29
Abstract
Abstract The delinearization circuit includes a first analog switch which is switchable in accordance with the duty cycle of the pulses in an input pulse train, between a given voltage and ground, to form a pulse train of constant amplitude. An intermediate signal is formed by time averaging the output of the first switch. A second analog switch, switchable in accordance with the duty cycle of the input pulse train between the intermediate signal and ground, forms a second pulse train which is time averaged to provide an output signal proportional to the square of the amplitude of the input signal pulse train. In a second embodiment of the invention, a maximum value circuit is utilized to select the greater of the intermediate signal and a reference voltage and the second switch is switched between the selected signal and ground. Through the proper selection of the value of the reference voltage, the desired switchover point can be obtained such that the amplitude of the output signal is linearly proportional to the input pulse train for a selected portion of the range thereof and is proportional to the square of the input pulse train for the remainder of the range thereof.
Inventors
- 👤 Ronald E. Champagne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:18
CPC Classifications
H; H03; H03J; H03J5/00; H03J5/02; H03J5/0245; H03J5/0254; H03J5/0263
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
69 words
A delinearization circuit comprising first switch means switchable, in accordance with an input signal, between a given voltage and a reference voltage to form a first signal, means for forming from said first signal an intermediate signal which is a function of said first signal, and second switch means switchable, in accordance with said input signal, between said intermediate signal and a reference signal, to form an output signal.
Claim 2
Dependent Claim
69 words
A delinearization circuit comprising first switch means switchable, in accordance with an input signal, between a given voltage and a reference voltage to form a first signal, means for forming from said first signal an intermediate signal which is a function of said first signal, and second switch means switchable, in accordance with said input signal, between said intermediate signal and a reference signal, to form an output signal.
Claim 3
Dependent Claim
23 words
The circuit of claim 1 wherein said intermediate signal forming means comprises means for forming substantially the time average of said first signal.
Claim 4
Dependent Claim
12 words
The circuit of claim 2 wherein said switch means are analog switches.
Claim 5
Dependent Claim
87 words
A delinearization circuit comprising first switch means switchable, in accordance with an input signal, between a given voltage and a reference voltage to form a first signal, means for forming from said first signal an intermediate signal which is a function of said first signal, a voltage source, means for selecting one of said intermediate signal voltage and the voltage from said source, and second switch means switchable, in accordance with said input signal, between said selected voltage and a reference voltage, to form an output signal.
Claim 6
Dependent Claim
87 words
A delinearization circuit comprising first switch means switchable, in accordance with an input signal, between a given voltage and a reference voltage to form a first signal, means for forming from said first signal an intermediate signal which is a function of said first signal, a voltage source, means for selecting one of said intermediate signal voltage and the voltage from said source, and second switch means switchable, in accordance with said input signal, between said selected voltage and a reference voltage, to form an output signal.
Claim 7
Dependent Claim
23 words
The circuit of claim 4 wherein said intermediate signal forming means comprises means for forming substantially the time average of said first signal.
Claim 8
Dependent Claim
12 words
The circuit of claim 4 wherein said switch means are analog switches.
Claim 9
Dependent Claim
115 words
An electronic tuning apparatus for use in a tuner or the like of the type having a tuning signal controlled tuning element, said apparatus comprising input signal generating means, a memory having a plurality of data storage locations, control means operatively connected to said input signal generating means for addressing a location in said memory in accordance with the generation of an input signal and for controlling data flow from said addressed location, means operatively connected to said memory for generating a signal variable in accordance with the data at said addressed location, means for delinearizing said variable signal to form a delinearized signal and means for forming the tuning signal from said delinearized signal.
Claim 10
Dependent Claim
115 words
An electronic tuning apparatus for use in a tuner or the like of the type having a tuning signal controlled tuning element, said apparatus comprising input signal generating means, a memory having a plurality of data storage locations, control means operatively connected to said input signal generating means for addressing a location in said memory in accordance with the generation of an input signal and for controlling data flow from said addressed location, means operatively connected to said memory for generating a signal variable in accordance with the data at said addressed location, means for delinearizing said variable signal to form a delinearized signal and means for forming the tuning signal from said delinearized signal.
Claim 11
Dependent Claim
71 words
The apparatus of claim 7 wherein said delinearizing means comprises first switch means switchable, in accordance with said variable signal, between a given voltage and a reference voltage to form a first signal, means for forming an intermediate signal which is a function of said first signal, and second switch means switchable, in accordance with said variable signal, between said intermediate signal and a reference voltage, to form said delinearized signal.
Claim 12
Dependent Claim
23 words
The apparatus of claim 8 wherein said intermediate signal forming means comprising means for forming substantially the time average of said first signal.
Claim 13
Dependent Claim
12 words
The apparatus of claim 8 wherein said switch means are analog switches.
Claim 14
Dependent Claim
87 words
The apparatus of claim 7 wherein said delinearization means comprises first switch means switchable, in accordance with said variable signal, between a given voltage and a reference voltage, to form a first signal, means for forming an intermediate signal which a function of said first signal, a voltage source, means for selecting the greater of said intermediate signal and said voltage from said source, second switch means switchable, in accordance with said variable signal, between said selected greater voltage and a reference voltage to produce said delinearization.
Claim 15
Dependent Claim
23 words
The apparatus of claim 11 wherein said intermediate signal forming means comprising means for forming substantially the time average of said first signal.
Claim 16
Dependent Claim
12 words
The apparatus of claim 11 wherein said switch means are analog switches.
References Cited (Backward Citations)
US2931985A
Cited
US3237117A
Cited
US3399358A
Cited
US3528043A
Cited
US3676661A
Cited
US3624638A
Cited
US3842416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |