450 Audio signal generator

Published:2011/4/19 2:54:00 Author:Ecco | Keyword: Audio, signal , generator | From:SeekIC

The oscillator is the services signal source for communication user . Working principle is as shown. It consists of VTl, VT2, and other related components. VTl using transformer T to couple oscillation signal, VT2 is the common collector buffer amplifier circuit, the emitter output. T transformer with 1-4 winding and the capacitor C4 form a selecting frequency network. In order to prevent magnetic saturation of T, T is connected to the collector of VTl by the 1-2 tap, 5-6 of T is the feedback loop. Detection: The DC-bit of pin-to-ground (reference value) is as shown in the table.



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