US4114097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency shift signal receiver
Assignee: Panasonic Holdings Corp
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Filing: 1975-10-28
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Granted: 1978-09-12
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Expires: 1995-10-28
Abstract
Abstract A frequency shift receiver for periodically receiving frequency shift (FS) signals while cyclically turning on and off a power supply for a preceding section of the receiver. An output from the discriminator is turned on and off in synchronism with the turning on and off of the power supply to prevent noise even when a frequency difference exists between the transmitter and receiver.
Inventors
- 👤 Noriyoshi Kubo
- 👤 Takeshi Katano
- 👤 Yoshinobu Tatsuzawa
- 👤 Tadatoshi Hagihira
- 👤 Masahiko Yamamoto
- 👤 Hiromi Wasai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:26
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/30; H03G3/34; H04; H04L; H04L27/00; H04L27/10; H04L27/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
76 words
A frequency shift receiver including a frequency discriminator for receiving a frequency shift signal comprising: first switching means connected between a power source and a preceding section of said receiver for periodically supplying power from said power source to said preceding section, and second switching means connected to said frequency discriminator for turning on and off an output of said frequency discriminator in synchronism with the turning on and off operation of said first switching means.
Claim 2
Dependent Claim
76 words
A frequency shift receiver including a frequency discriminator for receiving a frequency shift signal comprising: first switching means connected between a power source and a preceding section of said receiver for periodically supplying power from said power source to said preceding section, and second switching means connected to said frequency discriminator for turning on and off an output of said frequency discriminator in synchronism with the turning on and off operation of said first switching means.
Claim 3
Dependent Claim
51 words
A frequency shift receiver according to claim 1, wherein said second switching means comprises a transistor having a collector connected to an output terminal of said frequency discriminator, an emitter connected to ground and a base connected to said first switching means to receive power periodically supplied from said power source.
Claim 4
Dependent Claim
24 words
A frequency shift receiver according to claim 2, which further comprises a capacitor connected between said output terminal of said frequency discriminator and ground.
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) | 1981-09-11 | 1982-03-13 | 1982-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-11 | 1986-03-13 | 1986-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-11 | 1990-03-13 | 1990-09-12 | $7700.00 | Window Closed / Lapsed |