US3965468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Logic pulser
Assignee: HP Inc
•
Filing: 1975-01-17
•
Granted: 1976-06-22
•
Expires: 1995-01-17
Abstract
Abstract A logic pulser is disclosed which provides controlled pulses for stimulating a digital logic circuit under test. The pulser is serially programmed, e.g. by means of a manually operated push button switch to generate single pulses, continuous streams of pulses, or bursts of pulses. The pulser may include a visual output indicator such as an LED which flashes in a predetermined sequence to indicate in which mode the pulser is operating. The pulser may also include output circuitry which sets the voltage and automatically adjusts the width of the output pulses to provide appropriate net charge to different types of digital circuitry.
Inventors
- 👤 Barry Steven Bronson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:13
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/78; G; G01; G01R; G01R31/00; G01R31/28; G01R31/317; G01R31/3181; G01R31/319; G01R31/31917; G06; G06F; G06F11/00; G06F11/30; G06F11/32
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
68 words
A logic pulser for generating electronic pulses to induce changes of state in digital logic circuitry under test, said pulser comprising: means for generating pulses in a plurality of operating modes comprising (1) single pulses, (2) continuous streams of pulses, and (3) recurring pulse bursts containing a predetermined number of pulses; and coding means for serially encoding mode selection commands to select among said plurality of operating modes.
Claim 2
Dependent Claim
68 words
A logic pulser for generating electronic pulses to induce changes of state in digital logic circuitry under test, said pulser comprising: means for generating pulses in a plurality of operating modes comprising (1) single pulses, (2) continuous streams of pulses, and (3) recurring pulse bursts containing a predetermined number of pulses; and coding means for serially encoding mode selection commands to select among said plurality of operating modes.
Claim 3
Dependent Claim
37 words
A logic pulser as in claim 1 wherein said coding means comprises: a push button switch adapted for manual operation; and control means responsive to signals from said push button switch for serially encoding mode selection commands.
Claim 4
Dependent Claim
23 words
A logic pulser as in claim 1 further comprising display means for providing a visual indication of the operating mode of said pulser.
Claim 5
Dependent Claim
40 words
A logic pulser as in claim 3 wherein said display means comprises: an optical output element; and display drive means for driving said optical output element to provide a serially coded visual indication of the operating mode of said pulser.
Claim 6
Dependent Claim
34 words
A logic pulser as in claim 1 further comprising output means for providing output pulses of varying pulse width responsive to the amount of charge being delivered to the digital logic circuitry under test.
Claim 7
Dependent Claim
62 words
A logic pulser as in claim 5 wherein said output means comprises: a one-shot circuit to provide pulses of a nominal pulse width; a pair of output sensing circuits to sense the charge delivered to the logic circuitry under test; and means for adjusting the width of the pulses from said one-shot circuit in response to signals from said output sensing circuits.
References Cited (Backward Citations)
US2716230A
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 |