Patent US3593202A successfully refreshed from Google Patents.
US3593202A
Expired / Lapsed
US
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Amplitude control apparatus
Assignee: SPACE AND TACTICAL SYSTEMS COR
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Filing: 1969-07-22
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Granted: 1971-07-13
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Expires: 1989-07-22
Abstract
Abstract Frequency responsive amplitude control apparatus is disclosed including means for combining a first parameter with a second parameter to produce a third parameter, and means for varying impedance to the third parameter in response to the frequency of the third parameter introduced by the second parameter to produce a fourth parameter whose amplitude is a function of the frequency of the second parameter.
Inventors
- 👤 Donald William Shute
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:02
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
171 words
A frequency responsive amplitude control circuit for varying the amplitude of a first signal in accordance with the frequency of a second signal comprising: a modulating circuit for combining a first signal with a second signal to produce a combined output signal whose frequency is that of said second signal and whose amplitude varies as the frequency of said first signal, said first and second signal being of substantially different frequencies and said first signal being that whose amplitude is to be varied; means for providing said second signal to said modulating circuit; frequency sensitive impedance means having high impedance to said first signal frequency and low impedance to said second signal frequency for varying the amplitude of said combined output signal as a function of the frequency of said second signal; and demodulating means for combining said combined output signal passed by said frequency sensitive impedance and said second signal to extract said first signal whose amplitude has been altered as a function of the frequency of said second signal.
Claim 2
Dependent Claim
171 words
A frequency responsive amplitude control circuit for varying the amplitude of a first signal in accordance with the frequency of a second signal comprising: a modulating circuit for combining a first signal with a second signal to produce a combined output signal whose frequency is that of said second signal and whose amplitude varies as the frequency of said first signal, said first and second signal being of substantially different frequencies and said first signal being that whose amplitude is to be varied; means for providing said second signal to said modulating circuit; frequency sensitive impedance means having high impedance to said first signal frequency and low impedance to said second signal frequency for varying the amplitude of said combined output signal as a function of the frequency of said second signal; and demodulating means for combining said combined output signal passed by said frequency sensitive impedance and said second signal to extract said first signal whose amplitude has been altered as a function of the frequency of said second signal.
Claim 3
Dependent Claim
19 words
The circuit of claim 1 in which said first signal is of substantially lower frequency than said second frequency.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |