Tuner and splitter-modulator circuit having a common quartz crys

Details Tuner and splitter-modulator circuit having a common quartz crys Tuner and splitter-modulator circuit having a common quartz crys

1995-04-20

1997-06-17

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at same station

With a common signal processing stage

455 76, 455 77, 386 46, H04B 140

Patent

active

056406886

ABSTRACT:
A circuit arrangement comprising a tuner and a splitter-modulator, the latter made up of a splitter and a modulator, the splitter having an RF signal input for receiving an RF input signal, an RF signal output for supplying an RF output signal, and a first line for applying the RF input signal to the tuner. A second line is provided for supplying an RF output signal from the modulator. The tuner is adapted to demodulate the RF input signal and the modulator is adapted to, convert a baseband signal into the RF output signal to be supplied by the modulator. Devices for generating reference oscillations for the tuner and the splitter-modulator have one quartz crystal which is common to the tuner and the splitter-modulator. This results in a reduction in the number of components, particularly for generating the oscillations.

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"New High Density Multistandard RF-Concept for VCR" G.M. Maier et al, Thomson Consumer Electronics R&D Labs, Germany/Singapore; IEEE Transactions on Consumer Electronics, Bd. 38, Nr. 3, 1. Aug. 1992, Seiten 389-392, XP000311869.
Excerpt from European Search Report dated Aug. 20, 1996.

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