TV preamplifier circuit


Posted on Mar 28, 2007    8123

Amp circuit as shown in the pre-television. The pre-amplifier circuit is Qioi and other parts of xlol. Q [ol and biasing element is configured as a common emitter IF amplifier,

TV preamplifier circuit - schematic

IF signal through a coupling capacitor c] ol Qioi added to the base, is amplified by the collector output, and then through a coupling capacitor C103 is applied to a surface acoustic wave filter XjoJ input device (the coupling capacitor has a DC blocking effect). Inductor Lioi and collector load resistor R106 in parallel Qioi, the use of high-frequency signal L10l high impedance characteristics in the pre-amp to compensate for high-frequency characteristics.

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