US3965431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuitry for producing pulses with precise predetermined widths
Assignee: LIBRASCOPE Corp A CORP OF DELAWARE
•
Filing: 1975-01-02
•
Granted: 1976-06-22
•
Expires: 1995-01-02
Abstract
Abstract Circuitry for generating pulses with extremely accurate widths. Clock signals, from a precision crystal controlled oscillator, control an input flip-flop which fires a one-shot multivibrator adjusted as closely as possible to the desired pulse width. The one-shot output is coupled to an output flip-flop controlled by the crystal controlled clock so that the width of the output pulse becomes an exact multiple of the clock period.
Inventors
- 👤 Edgar A. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:55
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/01; H03K5/04; H03K5/05
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
120 words
Circuitry for generating a pulse of precise predetermined width in response to an input signal comprising: a clock-pulse generator; a one-shot multivibrator, said multivibrator being adjustable to approximately the desired predetermined pulse width; input means coupled to said generator and to said multivibrator, said input means being responsive to an input trigger signal for applying an actuating pulse to said multivibrator upon the occurrence of the first clock pulse after receipt of said triggering signal; and output means coupled to said clock pulse generator and to said multivibrator for generating an output pulse that initiates upon the occurrence of said multivibrator actuating pulse and which terminates upon the occurrence of the first clock pulse after completion of said multivibrator pulse.
Claim 2
Dependent Claim
120 words
Circuitry for generating a pulse of precise predetermined width in response to an input signal comprising: a clock-pulse generator; a one-shot multivibrator, said multivibrator being adjustable to approximately the desired predetermined pulse width; input means coupled to said generator and to said multivibrator, said input means being responsive to an input trigger signal for applying an actuating pulse to said multivibrator upon the occurrence of the first clock pulse after receipt of said triggering signal; and output means coupled to said clock pulse generator and to said multivibrator for generating an output pulse that initiates upon the occurrence of said multivibrator actuating pulse and which terminates upon the occurrence of the first clock pulse after completion of said multivibrator pulse.
Claim 3
Dependent Claim
15 words
The circuitry claimed in claim 1 wherein said one-shot multivibrator is a resistance coupled multivibrator.
Claim 4
Dependent Claim
20 words
The circuitry claimed in claim 1 wherein said input means includes a JK flip-flop with a grounded K input terminal.
Claim 5
Dependent Claim
27 words
The circuitry claimed in claim 1 wherein said clock pulse generator produces pulses at a frequency of approximately 100 times the frequency of said input triggering signal.
References Cited (Backward Citations)
US3781573A
Cited
US3838297A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |