Telecommunications – Transmitter and receiver at same station – With transmitter-receiver switching or interaction prevention
Patent
1983-07-05
1985-02-19
Ng, Jin F.
Telecommunications
Transmitter and receiver at same station
With transmitter-receiver switching or interaction prevention
455 86, H04B 144, H04B 154
Patent
active
045010188
ABSTRACT:
A radio frequency transceiver is provided in which the crystal resonator and monolithic crystal filter devices therein all operate at or near the operating frequency of the transceiver, and which employs a single piezoelectric element to achieve the functions of receiver signal filtering, transmitter signal filtering, receiver local oscillator signal generation, and transmitter local oscillator signal generation. To achieve these functions, a crystal resonator and a monolithic crystal filter are situated on the same substrate of piezoelectric material. The crystal resonator portion of the piezoelectric device is employed to control the frequency at which a local oscillator generates radio frequency energy. Such crystal controlled local oscillator is shared by a receiver mixer circuit and a transmitter mixer circuit. Switching circuitry is employed to switch the crystal filter portion of the piezoelectric device from the receiver signal path to the transmitter signal path.
REFERENCES:
patent: 2985753 (1959-04-01), Goodreau
patent: 3470472 (1969-09-01), Suzuki et al.
patent: 3641434 (1972-02-01), Yates et al.
patent: 3925729 (1975-12-01), Amoroso
patent: 3983484 (1976-09-01), Hodama
patent: 4027242 (1977-05-01), Yamanaka
patent: 4053717 (1977-10-01), Snider
patent: 4054837 (1977-10-01), Hibbs, Jr. et al.
patent: 4162446 (1979-07-01), Cochran
patent: 4254504 (1981-03-01), Lewis et al.
patent: 4462009 (1984-07-01), Landt et al.
Braun William V.
Shanley Charles W.
Gillman James W.
Miller Jerry A.
Motorola Inc.
Ng Jin F.
Roney Edward M.
LandOfFree
Simplex transceiver employing a common piezoelectric element for does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Simplex transceiver employing a common piezoelectric element for, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simplex transceiver employing a common piezoelectric element for will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-617865