US4701715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preceding value holding gate circuit for eliminating pulsive noises
Assignee: Faurecia Clarion Electronics Co Ltd
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Filing: 1986-12-03
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Granted: 1987-10-20
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Expires: 2006-12-03
Abstract
Abstract A gate circuit is configured to output a received signal via a buffer amplifier, enter the output in a storage capacitor via a first switching circuit normally taking its off-position, compare the signal levels at both ends of the switching circuit and feed back the comparison result to an input terminal via a second switching circuit normally taking its on-position, and configured so that when noise components in the received signal are detected, a control signal is produced to change the first switching circuit to its on-position and the second switching circuit to its off-position.
Inventors
- 👤 Kiyoshi Amazawa
- 👤 Akira Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:36
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/30; H03G3/34; H03G3/345
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A gate circuit comprising: a buffer amplifier means connected between an input terminal and an output terminal; a noise detecting means for detecting noise components in an input signal applied to said input terminal and producing a control signal; a first switching means having one end connected to said output terminal and normally taking its on-position but changed to its off-position by said control signal from the noise detecting means; a signal holding means connected to the other end of said first switching means; a level comparator means for detecting a difference between signal levels at both ends of said first switching means; and a second switching means having one end connected to said input terminal and the other end connected to the output of said level comparator means and normally taking its off-position but changed to its on-position by said control signal.
Claim 2
Dependent Claim
143 words
A gate circuit comprising: a buffer amplifier means connected between an input terminal and an output terminal; a noise detecting means for detecting noise components in an input signal applied to said input terminal and producing a control signal; a first switching means having one end connected to said output terminal and normally taking its on-position but changed to its off-position by said control signal from the noise detecting means; a signal holding means connected to the other end of said first switching means; a level comparator means for detecting a difference between signal levels at both ends of said first switching means; and a second switching means having one end connected to said input terminal and the other end connected to the output of said level comparator means and normally taking its off-position but changed to its on-position by said control signal.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-19 | 1991-04-20 | 1991-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-19 | 1995-04-20 | 1995-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-19 | 1999-04-20 | 1999-10-20 | $7700.00 | Window Closed / Lapsed |