Patent US3781870A successfully refreshed from Google Patents.
US3781870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage to pulse width converter
Assignee: RCA Corp
•
Filing: 1972-04-20
•
Granted: 1973-12-25
•
Expires: 1992-04-20
Abstract
Abstract A circuit for converting an input voltage, the polarity and magnitude of which may vary, into two sets of pulses, one for each polarity of input voltage. The width of each pulse is related to the magnitude of the input voltage. The circuit includes a feedback arrangement to enhance the accuracy of the circuit.
Inventors
- 👤 G Cutsogeorge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:14
CPC Classifications
H; H03; H03K; H03K7/00; H03K7/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
258 words
A circuit for generating a first and a second set of output pulses on first and second output lines, respectively, in response to an input signal the polarity and magnitude of which may vary, said circuit comprising: first means comprising a first and second amplifier each having two input terminals and an output terminal, the output terminal of the first amplifier being connected to one input terminal of the second amplifier, a series of pulses being provided at the output terminal of the second amplifier, the pulse width of each of the pulses in said series being related to the absolute value of the magnitude of said input signal; second means for supplying a pulse train having a certain frequency of repetition; means responsive to said pulse train for providing a reference signal; means adapted for applying said reference signal to the other input terminal of said second amplifier; third means responsive to said pulse train and to said series of pulses for providing said first set of output pulses on said first output line when the input signal is at one polarity and for providing said second set of output pulses on said second output line when the input signal is at another polarity; means adapted for applying said input signal and one feedback signal related to one of said sets of output pulses to one input terminal of said first amplifier; and means adapted for applying another feedback signal related to the other set of output pulses to the other input terminal of said first amplifier.
Claim 2
Dependent Claim
258 words
A circuit for generating a first and a second set of output pulses on first and second output lines, respectively, in response to an input signal the polarity and magnitude of which may vary, said circuit comprising: first means comprising a first and second amplifier each having two input terminals and an output terminal, the output terminal of the first amplifier being connected to one input terminal of the second amplifier, a series of pulses being provided at the output terminal of the second amplifier, the pulse width of each of the pulses in said series being related to the absolute value of the magnitude of said input signal; second means for supplying a pulse train having a certain frequency of repetition; means responsive to said pulse train for providing a reference signal; means adapted for applying said reference signal to the other input terminal of said second amplifier; third means responsive to said pulse train and to said series of pulses for providing said first set of output pulses on said first output line when the input signal is at one polarity and for providing said second set of output pulses on said second output line when the input signal is at another polarity; means adapted for applying said input signal and one feedback signal related to one of said sets of output pulses to one input terminal of said first amplifier; and means adapted for applying another feedback signal related to the other set of output pulses to the other input terminal of said first amplifier.
Claim 3
Dependent Claim
24 words
The circuit according to claim 1 wherein said means responsive to said pulse train for providing a reference signal comprises a sawtooth wave generator.
Claim 4
Dependent Claim
131 words
The circuit according to claim 1 wherein said third means comprises a phase detector having two input terminals and two output lines, one input terminal being connected to the second amplifier output terminal and the other input terminal being connected to said means for providing a pulse train, said first set of output pulses being provided on said first output line when the signal applied to the first input terminal of the phase detector leads the pulses of said pulse train applied to said other input terminal of the phase detector, said second set of output pulses being provided on said second output line when the signal applied to the first input terminal of the phase detector lags the pulses of said pulse train applied to said other input terminal thereof.
Claim 5
Dependent Claim
33 words
The circuit according to claim 3 wherein said means for providing a feedback signal includes a first and second low pass filter respectively connected with each of said first and second output lines.
Claim 6
Dependent Claim
21 words
The circuit according to claim 4 further including a utilization device resonsive to said first and second sets of output pulses.
Claim 7
Dependent Claim
31 words
The circuit according to claim 4 wherein said first amplifier is an integrating amplifier and wherein the input terminals of said first and second amplifiers comprise inverting and non-inverting input terminals.
Claim 8
Dependent Claim
54 words
The circuit according to claim 6 wherein the input signal is applied to the inverting input terminal of said first amplifier, the non-inverting input terminal of said first amplifier being connected to said first low pass filter, the inverting input terminal of said first amplifier also being connected to said second low pass filter.
Claim 9
Dependent Claim
40 words
The circuit according to claim 7 wherein the output terminal of said first amplifier has a connection to the non-inverting input terminal of the second amplifier, the reference signal being applied to the inverting input terminal of the second amplifier.
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |