Multiple-line superheterodyne transmission and reception device

Details Multiple-line superheterodyne transmission and reception device Multiple-line superheterodyne transmission and reception device

1991-07-03

1993-04-06

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at same station

With frequency stabilization

455 86, H04B 140

Patent

active

052010643

ABSTRACT:
A transmitting and multiple line superheterodyne receiving device and transmitting device for the communications, particularly telecommunications field is disclosed. To suppress the modulation signal components otherwise generated by the transmitting device, a compensation device is provided which includes a frequency control circuit with a voltage controlled oscillator, whose nominal frequency corresponds to the sum or difference of the first and second intermediate frequencies and which is connected to a second receiving mixer.

REFERENCES:
patent: 4027242 (1977-05-01), Yamanaka
patent: 4097805 (1978-06-01), Fujii
patent: 4542531 (1985-09-01), Fukumura
patent: 4633511 (1986-12-01), Koga et al.
patent: 5014340 (1991-05-01), Wren

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