Patent US3644720A successfully refreshed from Google Patents.
US3644720A
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US
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Gain multiplier
Assignee: Colt Industries Operating Corp
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Filing: 1969-10-06
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Granted: 1972-02-22
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Expires: 1989-10-06
Abstract
Abstract Circuitry for digitally implementing gain variation as a function of input signal magnitude. Gain variation, in stepwise fashion, in either a feedback or forward loop is achieved by varying the weight given signals applied to a counter. In the feed forward embodiment, the output of the counter comprises the circuit output signal while in the feedback loop embodiment the output of the counter is compared with a stored count commensurate with the circuit input signal.
Inventors
- 👤 Ronald E Falk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:17
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/40; G05B2219/00; G05B2219/30; G05B2219/41; G05B2219/41021
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
174 words
A variable gain circuit comprising: first pulse counter means having a plurality of stages and input and output terminals; frequency changer means having an input terminal and an output terminal coupled to said first pulse counter means input terminal; and electronic switch means connected and responsive to a preselected state of said first pulse counter means, said switch means having an input terminal and a pair of output terminals respectively connected to said frequency changer means and pulse counter means input terminals, said switch means being in a first state when said Counter has totalized a count less than that commensurate with said preselected stage and being in a second state when said counter has counted up to a count commensurate with said preselected stage, the state of said switch means determining whether pulses applied to said switch means input terminal are applied by said switch means directly to said counter means and counted at full weight or are routed to said counter via said frequency changer means and counted at an artificial weight.
Claim 2
Dependent Claim
174 words
A variable gain circuit comprising: first pulse counter means having a plurality of stages and input and output terminals; frequency changer means having an input terminal and an output terminal coupled to said first pulse counter means input terminal; and electronic switch means connected and responsive to a preselected state of said first pulse counter means, said switch means having an input terminal and a pair of output terminals respectively connected to said frequency changer means and pulse counter means input terminals, said switch means being in a first state when said Counter has totalized a count less than that commensurate with said preselected stage and being in a second state when said counter has counted up to a count commensurate with said preselected stage, the state of said switch means determining whether pulses applied to said switch means input terminal are applied by said switch means directly to said counter means and counted at full weight or are routed to said counter via said frequency changer means and counted at an artificial weight.
Claim 3
Dependent Claim
33 words
The apparatus of claim 1 wherein said frequency changer means comprises: a frequency divider, said switch means input pulses being routed through said divider when said switch means is in said first state.
Claim 4
Dependent Claim
33 words
The apparatus of claim 1 wherein said frequency changer means comprises: a frequency divider, said switch means input pulses being routed through said divider when said switch means is in said second state.
Claim 5
Dependent Claim
77 words
The apparatus of claim 3 further comprising: second pulse counter means, input pulses being applied to said second pulse counter means; and comparator means connected to the outputs of said pulse counter means for digitally comparing the counts stored therein, the output of said comparator means being connected to the input terminal of said switch means whereby the output of said comparator will be fed back to said pulse counter means in an altered or unaltered state.
Claim 6
Independent Claim
51 words
A method of varying the gain of a digital control system comprising: varying in step wise fashion the weight at which input pulses are counted in accordance with the magnitude of the input signal; counting the thus weighted pulses; and applying the totalized pulse count to a mechanism to be controlled.
Claim 7
Independent Claim
51 words
A method of varying the gain of a digital control system comprising: varying in step wise fashion the weight at which input pulses are counted in accordance with the magnitude of the input signal; counting the thus weighted pulses; and applying the totalized pulse count to a mechanism to be controlled.
Claim 8
Independent Claim
63 words
A method of varying the gain of a digital control system comprising: counting input pulses commensurate with a command signal; counting feedback pulses commensurate with control system output signals; comparing the stored input and feedback counts to provide a system output signal; and varying the weight at which the feedback pulses are counted in accordance with the magnitude of the system output signals.
Claim 9
Independent Claim
63 words
A method of varying the gain of a digital control system comprising: counting input pulses commensurate with a command signal; counting feedback pulses commensurate with control system output signals; comparing the stored input and feedback counts to provide a system output signal; and varying the weight at which the feedback pulses are counted in accordance with the magnitude of the system output signals.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |