Patent US4724339A successfully refreshed from Google Patents.
US4724339A
Expired / Lapsed
US
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Low electric power consumption voltage comparison device
Assignee: Fanuc Corp
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Filing: 1985-11-12
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Granted: 1988-02-09
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Expires: 2005-11-12
Abstract
Abstract Electric current supply circuits (23), (24) each having a switching element are inserted at an electric power supply side (31) and at an electric power return side (32) of a differential amplification means (10) in a voltage comparison device, and the electric current supply circuits having the switching element are controlled to turn ON/OFF. Thus, a voltage comparison device with a low electric power consumption and a high speed intermittent operation can be achieved.
Inventors
- 👤 Hiroshi Ishida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:35
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/165; G01R19/16566; G01R19/16576; G01R19/1658; H; H03; H03K; H03K5/00; H03K5/22; H03K5/24; H03K5/2409; H03K5/2418
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
129 words
A voltage comparison device comprising: a differential amplification means having a noninverting input terminal and an inverting input terminal, for amplifying differentially an input signal and for generating an output signal; a first and a second voltage sources; an electric power supply feeder line for connecting said differential amplification means to said first voltage source; an electric power return feeder line for connecting said differential amplification means to said second voltage source; a first electric current supply circuit having a switching element, and interposed in said electric power supply feeder line; and a second electric current supply circuit having a switching element, and interposed in said electric power return feeder line; wherein, the switching elements of said first and second electric current supply circuits are controlled to turn ON/OFF.
Claim 2
Dependent Claim
129 words
A voltage comparison device comprising: a differential amplification means having a noninverting input terminal and an inverting input terminal, for amplifying differentially an input signal and for generating an output signal; a first and a second voltage sources; an electric power supply feeder line for connecting said differential amplification means to said first voltage source; an electric power return feeder line for connecting said differential amplification means to said second voltage source; a first electric current supply circuit having a switching element, and interposed in said electric power supply feeder line; and a second electric current supply circuit having a switching element, and interposed in said electric power return feeder line; wherein, the switching elements of said first and second electric current supply circuits are controlled to turn ON/OFF.
Claim 3
Dependent Claim
23 words
A device as set forth in claim 1 wherein each of said first and second electric current supply circuits comprise a constant-current circuit.
Claim 4
Dependent Claim
23 words
A device as set forth in claim 1 wherein said switching elements in said first and second electric current supply circuits comprise transistors.
Claim 5
Dependent Claim
23 words
A device as set forth in claim 2 wherein said switching elements in said first and second electric current supply circuits comprise transistors.
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) | 1991-02-08 | 1991-08-10 | 1992-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-08 | 1995-08-10 | 1996-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-08 | 1999-08-10 | 2000-02-09 | $7700.00 | Window Closed / Lapsed |