US4149160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-input signal comparator and indicator circuit
Assignee: Honeywell Inc
•
Filing: 1978-01-30
•
Granted: 1979-04-10
•
Expires: 1998-01-30
Abstract
Abstract A multi-input signal comparator and indicator circuit for comparing a plurality of signal levels with a reference level and an indicator circuit arranged to respond to a comparator output signal for indicating an error in any of the comparator input signals. A high and a low comparator is used for each input signal to provide a "window" comparison while separate indicators provide a readout of high and low errors.
Inventors
- 👤 Theodore B. Bozarth
- 👤 Martin Zielinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:30
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/0038
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
126 words
A comparator and indicator circuit comprising a plurality of signal comparators with each of said comparators being arranged to compare a corresponding input signal with a reference signal, a first signal inverter circuit, means connecting all of the output signals from said comparators to an input of said inverter means, a first visual indicator means connected to an output of said comparator means to provide a visual indication of the state of an output signal from said comparator means, a second signal inverter means arranged to invert an output signal from said first inverter means, and a second indicator means connected to an output of said second inverter means to provide a visual indication of a state of an output signal from said second inverter means.
Claim 2
Dependent Claim
126 words
A comparator and indicator circuit comprising a plurality of signal comparators with each of said comparators being arranged to compare a corresponding input signal with a reference signal, a first signal inverter circuit, means connecting all of the output signals from said comparators to an input of said inverter means, a first visual indicator means connected to an output of said comparator means to provide a visual indication of the state of an output signal from said comparator means, a second signal inverter means arranged to invert an output signal from said first inverter means, and a second indicator means connected to an output of said second inverter means to provide a visual indication of a state of an output signal from said second inverter means.
Claim 3
Dependent Claim
57 words
A comparison and indication circuit as set forth in claim 1 and including a third inverter means arranged to invert an output signal from said second inverter means and a feedback means arranged to apply an output signal from said third inverter means as a positive feedback signal concurrently to all of said plurality of comparator means.
Claim 4
Dependent Claim
188 words
A comparator and indicator circuit as set forth in claim 1 wherein a first predetermined number of said plurality of comparator means are arranged to determine a first type of error in the input signals being compared and a second predetermined number of said plurality of comparators are arranged to determine a second type of error in the input signals being compared and further including a first circuit means connecting said first predetermined number of said plurality of comparator means to said input of said first signal inverter circuit and wherein said indicator means includes a third inverting means for inverting an output from said second number of said plurality of comparators, second circuit means connecting said second number of said plurality of comparators to an input of said third inverting means, a third indicator means arranged to produce a visual indication of an error in an output signal from said third comparator means, a fourth inverter means arranged to invert an output signal from said third inverter means and a fourth indicator means arranged to indicate a state of an output signal from said fourth inverter means.
Claim 5
Dependent Claim
22 words
A comparison and indicator circuit as set forth in claim 1 wherein said first and second indicator means are light emitting diodes.
Claim 6
Dependent Claim
58 words
A comparison and indicator circuit as set forth in claim 3 and including a fifth inverter means arranged to invert an output signal from said second inverter means and a feedback means arranged to apply an output signal from said fifth inverter means as a positive feedback signal concurrently to all of said first number of said comparators.
Claim 7
Dependent Claim
58 words
A comparison and indicator circuit as set forth in claim 3 and including a sixth inverter means arranged to invert an output signal from said fourth inverter means and a feedback means arranged to apply an output signal from said sixth inverter means as a positive feedback signal concurrently to all of said second number of said comparators.
References Cited (Backward Citations)
US2958823A
Cited
US3021514A
Cited
US3072895A
Cited
US3122729A
Cited
US3341816A
Cited
US3351927A
Cited
US3457560A
Cited
US3534353A
Cited
US3641546A
Cited
US3813665A
Cited
US3916399A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-09 | 1982-10-09 | 1983-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-09 | 1986-10-09 | 1987-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-09 | 1990-10-09 | 1991-04-10 | $7700.00 | Window Closed / Lapsed |