US4426732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Receiver having a surface elastic wave high frequency amplifier with a frequency-controlled pump oscillator
Assignee: Faurecia Clarion Electronics Co Ltd
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Filing: 1982-06-07
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Granted: 1984-01-17
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Expires: 2002-06-07
Abstract
Abstract Receiver comprising at least two output means taking out electric signals corresponding to sound waves propagating in different directions in a surface elastic wave amplifier disposed in the high frequency amplifier stage, wherein phase difference or frequency difference between outputs of said output means is detected and frequency of pumping electric power applied to said surface elastic wave amplifier is controlled in response to output thus detected.
Inventors
- 👤 Masaharu Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:23
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H03; H03F; H03F13/00; H04B1/26
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
94 words
Receiver comprising the following means: a surface elastic wave amplifier disposed in the high frequency amplifier stage of said receiver; at least two output means taking out electric signals corresponding to sound waves propagating in different directions in response to input signals in said surface elastic wave amplifier; detection means detecting phase errors or frequency errors of electric output signals of said output means; means applying pumping electric power to said surface elastic wave amplifier; and control means controlling the frequency of said pumping electric power in response to output of said detection means.
Claim 2
Dependent Claim
94 words
Receiver comprising the following means: a surface elastic wave amplifier disposed in the high frequency amplifier stage of said receiver; at least two output means taking out electric signals corresponding to sound waves propagating in different directions in response to input signals in said surface elastic wave amplifier; detection means detecting phase errors or frequency errors of electric output signals of said output means; means applying pumping electric power to said surface elastic wave amplifier; and control means controlling the frequency of said pumping electric power in response to output of said detection means.
Claim 3
Dependent Claim
45 words
Receiver according to claim 1, wherein said detection means consists of two sets of superheterodyne circuit, each of them being coupled to each of said output means and a phase comparator, to which intemediate frequency signals of each of said sets of circuit are applied.
Claim 4
Dependent Claim
26 words
Receiver according to claim 1, wherein said means applying pumping electric power comprises a voltage control type oscillator, said oscillator being controlled by said control means.
Claim 5
Dependent Claim
14 words
Receiver according to claim 1, wherein one of said output means comprises a circulator.
Claim 6
Dependent Claim
18 words
Receiver according to claim 1, wherein a band pass filter is disposed in the stage preceeding said circulator.
Claim 7
Dependent Claim
17 words
Receiver according to claim 1, wherein said surface elastic wave amplifier is provided with a multistrip coupler.
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) | 1987-01-16 | 1987-07-18 | 1988-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-16 | 1991-07-18 | 1992-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-16 | 1995-07-18 | 1996-01-17 | $7700.00 | Window Closed / Lapsed |