US3836858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse width setting apparatus
Assignee: Denso Corp
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Filing: 1972-06-20
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Granted: 1974-09-17
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Expires: 1992-06-20
Abstract
Abstract A pulse width setting apparatus provided with a switching circuit which is switched from one state to the other state upon receipt of a trigger pulse, a counting circuit for counting clock pulses, and a comparator for comparing a count of said counting circuit with a given binary code for determining a pulse width and generating a signal when the count becomes equal to the binary code to thereby restore said switching circuit to the original one state.
Inventors
- 👤 A Kitano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:58
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/66; H03M1/82; H03M1/822
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
224 words
A pulse width setting apparatus for determining a pulse width by reCeiving clock pulses having a predetermined frequency, a trigger pulse and given binary code signals comprising: a counter ciruit having a first terminal, a second terminal and output terminals for counting said clock pulses applied to said first input terminal upon receipt of said trigger pulse applied to said second input terminal and generating output binary code signals responsive to the count of said clock pulses at said output terminals; a comparator circuit having first input terminals for receiving said given binary code signals, second input terminals connected with the output terminals of said counter circuit, and an output terminal, for comparing the value of said output binary code signals with the value of said given binary code signals and generating a signal at said output terminal when said values of both binary code signals become equal to each other; and a switching circuit having a first input terminal for receiving said trigger signal and directly connected to said second input terminal of said counter circuit, a second input terminal connected with the output terminal of said comparator circuit and an output terminal, for generating an output pulse during a period of time starting at the application of said trigger pulse and terminating at the generation of the output signal of said comparator.
Claim 2
Dependent Claim
224 words
A pulse width setting apparatus for determining a pulse width by reCeiving clock pulses having a predetermined frequency, a trigger pulse and given binary code signals comprising: a counter ciruit having a first terminal, a second terminal and output terminals for counting said clock pulses applied to said first input terminal upon receipt of said trigger pulse applied to said second input terminal and generating output binary code signals responsive to the count of said clock pulses at said output terminals; a comparator circuit having first input terminals for receiving said given binary code signals, second input terminals connected with the output terminals of said counter circuit, and an output terminal, for comparing the value of said output binary code signals with the value of said given binary code signals and generating a signal at said output terminal when said values of both binary code signals become equal to each other; and a switching circuit having a first input terminal for receiving said trigger signal and directly connected to said second input terminal of said counter circuit, a second input terminal connected with the output terminal of said comparator circuit and an output terminal, for generating an output pulse during a period of time starting at the application of said trigger pulse and terminating at the generation of the output signal of said comparator.
Claim 3
Dependent Claim
69 words
A pulse width setting apparatus according to claim 1 further comprising, a frequency divider connected with the first terminal of said counter through which said clock pulses are applied to said counter, for counting said clock pulses upon receipt of said trigger pulse and generating output pulses having a divided frequency of that of said clock pulses, whereby said counter circuit counts the output pulses of said frequency divider.
Claim 4
Dependent Claim
87 words
A pulse width setting apparatus according to claim 1 further comprising, a synchronizing circuit having a first input terminal for receiving said clock pulses, a second input terminal for receiving said trigger signal and an output terminal connected with the second input terminal of said counter and the first input terminal of said switching circuit, for generating an output pulse formed by delaying said trigger pulse to synchronize with said clock pulses, whereby said counter and said switching circuit receives said output pulse of said synchronizing circuit.
Claim 5
Dependent Claim
85 words
A pulse width setting apparatus according to claim 1 further receiving a shift signal and further comprising, a shift register having first input terminal for receiving said given binary code signals, a second input terminal for receiving said shift signal and output terminals connected with the first input terminals of said comparator, for generating output binary code signals formed by shifting said given binary code signals when said shift signal is applied, whereby said comparator receives the output binary code signals of said shift register.
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |