US4495653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diversity receiver
Assignee: Faurecia Clarion Electronics Co Ltd
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Filing: 1983-04-25
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Granted: 1985-01-22
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Expires: 2003-04-25
Abstract
Abstract The diversity receiver including plural antennas and one receiver comprises a detector means to detect a signal voltage responsive to an antenna output from an IF amplifier of the receiver and a comparator which is supplied with the signal voltage separated in two courses, one including a fixed bias applying circuit and the other including a time constant circuit, so as to select one of the antennas which is in a good receiving condition.
Inventors
- 👤 Masanori Hamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:55
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/02; H04B7/04; H04B7/08; H04B7/0802; H04B7/0805; H04B7/0814
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
A diversity receiver which comprises: a plurality of antennas; an antenna selecting means to which said antennas are connected; a receiver to which an antenna output from said antenna selecting means is applied; a detector means to detect a signal voltage responsive to said antenna output from the output of an intermediate frequency amplifier of said receiver; a judging means responsive to said signal voltage from said detector means to generate a judgement signal indicating whether receiving condition of operating one of the antennas is good or not; a control means responsive to said judgement signal from said judging means to actuate said antenna selecting means so as to select one of said antennas which is in a good receiving condition; said judging means including a comparator and two paths connecting two input terminals of said comparator to said detector means for comparing two inputs applied to said input terminals, one of said paths including a time constant circuit and the other including a bias applying means, at least one diode being connected between said detecting means and said two paths of the judging means.
Claim 2
Dependent Claim
185 words
A diversity receiver which comprises: a plurality of antennas; an antenna selecting means to which said antennas are connected; a receiver to which an antenna output from said antenna selecting means is applied; a detector means to detect a signal voltage responsive to said antenna output from the output of an intermediate frequency amplifier of said receiver; a judging means responsive to said signal voltage from said detector means to generate a judgement signal indicating whether receiving condition of operating one of the antennas is good or not; a control means responsive to said judgement signal from said judging means to actuate said antenna selecting means so as to select one of said antennas which is in a good receiving condition; said judging means including a comparator and two paths connecting two input terminals of said comparator to said detector means for comparing two inputs applied to said input terminals, one of said paths including a time constant circuit and the other including a bias applying means, at least one diode being connected between said detecting means and said two paths of the judging means.
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) | 1988-01-22 | 1988-07-23 | 1989-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-22 | 1992-07-23 | 1993-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-22 | 1996-07-23 | 1997-01-22 | $7700.00 | Window Closed / Lapsed |