This is a circuit diagram for a direct- coupled amplifier, in which the amplifier periodically disconnects itself from the input signal and ... When Su S2, and S3 go down, the amplifier input is grounded and A2 forces the output of At to ground.
|Title||:||Applications of linear integrated circuits|
|Author||:||Eugene R. Hnatek|
|Publisher||:||Wiley-Interscience - 1975|