Patent US3961281A successfully refreshed from Google Patents.
US3961281A
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US
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Digital control system
Assignee: RCA Licensing Corp
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Filing: 1975-05-23
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Granted: 1976-06-01
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Expires: 1995-05-23
Abstract
Abstract Remote control signals actuate digital circuitry suitable for controlling the volume of an audio amplifier. A digital counter either increases or decreases in count corresponding to a desired volume control level. Circuitry associated with the counter causes an audio amplifier control voltage derived therefrom to increase at a first rate of change in response to a predetermined range of counter output and at a second rate of change corresponding to a second predetermined range of counter output.
Inventors
- 👤 Kenneth Rau Woolling, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:13
CPC Classifications
H; H03; H03J; H03J1/00; H03J1/18; H03J1/20; H03G; H03G1/00; H03G1/02; H03J9/00; H03J9/04; H03M; H03M1/00; H03M1/66; H03M1/661; H03M1/12; H03M1/14; H03M1/16; H03M1/164; H03M1/165
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
152 words
Apparatus responsive to transmitted remote control signals for providing a control voltage suitable for controlling the gain of a voltage controlled amplifier comprising: receiving means responsive to said transmitted control signals for providing actuating signals; pulse generating means responsive to said actuating signals for providing a series of output pulses; counting means responsive to pulses from said generating means for providing numerical representative binary coded output signals; digital-to-analog converter means responsive to signals from said pulse responsive means for providing an output voltage level representative of said binary coded signals; and means responsive to said output voltage level from said converter means for providing a modified output voltage having a first rate of change with respect to said numerical representative signals for output voltage levels of a first voltage range and a second rate of change with respect to said numerical representative signals for output voltage levels of a second voltage range.
Claim 2
Dependent Claim
152 words
Apparatus responsive to transmitted remote control signals for providing a control voltage suitable for controlling the gain of a voltage controlled amplifier comprising: receiving means responsive to said transmitted control signals for providing actuating signals; pulse generating means responsive to said actuating signals for providing a series of output pulses; counting means responsive to pulses from said generating means for providing numerical representative binary coded output signals; digital-to-analog converter means responsive to signals from said pulse responsive means for providing an output voltage level representative of said binary coded signals; and means responsive to said output voltage level from said converter means for providing a modified output voltage having a first rate of change with respect to said numerical representative signals for output voltage levels of a first voltage range and a second rate of change with respect to said numerical representative signals for output voltage levels of a second voltage range.
Claim 3
Dependent Claim
60 words
Apparatus according to claim 1 wherein: said voltage level responsive means comprises means for generating a reference voltage representative of the signal level at which said first voltage range ends and said second voltage range begins; and means providing a first signal path for signals of said first voltage range and an additional path for signals of said second range.
Claim 4
Dependent Claim
26 words
Apparatus according to claim 2 wherein: signals provided by said voltage level responsive means are provided at said first path and diminished in said additional path.
Claim 5
Dependent Claim
49 words
Apparatus according to claim 3 wherein: said digital-to-analog converter means comprises a plurality of resistance elements having a commonly coupled electrode and resistance value of substantially two times the resistance of the preceeding resistance with the exception of the first resistance element which is set at a predetermined value.
References Cited (Backward Citations)
US3579138A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |