Circuit Diagram Stereo Coder Multplexer
Multiplexer consists of 4 TTL ICs and transistors. A 7600-kHz crystal oscillator built with the 3-NAND
The IC’s 2 and 3 of type SN7490. Now think of 76 kHz signal
as a divider of two Werken. Either 38 kHz signal and the output Q Qnot decreased.
Transistors T1 and T2 thus transformed [...]
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