US5014050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic interrogation circuits
Assignee: HENNION CLAUDE 14 RUE de la GLACIERE 75013 PARIS (FRANCE)
•
Filing: 1989-03-29
•
Granted: 1991-05-07
•
Expires: 2009-03-29
Abstract
Abstract The invention relates to an electronic circuit for remote interrogation of a receiver through a two wire line and to detect the response signals emitted by this receiver. The circuit comprises means for comparing with a reference voltage the actual voltage defining said response signals. This reference voltage is a weighted variable voltage obtained by low band-pass filtering, in a resistance-capacity circuit, of said actual voltage.
Inventors
- 👤 Jacques Lewiner
- 👤 Claude Hennion
- 👤 Eugeniusz Smycz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:59
CPC Classifications
H; H04; H04Q; H04Q9/00; H04Q9/14
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
81 words
Electronic circuit for remote interrogation of a receiver through a two wire line and for detecting the response signals emitted by this receiver, said circuit comprising low-band pass filtering means for low band-pass filtering the actual voltage defining said response signals to produce a reference voltage comprising a weighted variable voltage, and means for comparing said reference voltage with said actual voltage and for only retaining the portions of said actual voltage which exceed said reference voltage in a predetermined direction.
Claim 2
Dependent Claim
81 words
Electronic circuit for remote interrogation of a receiver through a two wire line and for detecting the response signals emitted by this receiver, said circuit comprising low-band pass filtering means for low band-pass filtering the actual voltage defining said response signals to produce a reference voltage comprising a weighted variable voltage, and means for comparing said reference voltage with said actual voltage and for only retaining the portions of said actual voltage which exceed said reference voltage in a predetermined direction.
Claim 3
Dependent Claim
45 words
The electronic circuit according to claim 1, wherein the low band-pass filtering means comprises a resistance-capacitance circuit the time constant of which is comprised between T and 10T, where T denotes the shortest duration of the pulses and gaps between pulses defining the response signals.
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) | 1994-05-06 | 1994-11-05 | 1995-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-06 | 1998-11-05 | 1999-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-06 | 2002-11-05 | 2003-05-07 | $7700.00 | Window Closed / Lapsed |