Found in Motorola documentation from the 90s, this circuit makes use of a triac from that time. The circuit is for the 110 V mains but can be modified for other grid voltages.
This stage of audio power is suggested by the Hitachi Semiconductor Manual, using a complementary pair at...
This stage is intended to receive modulated optical signals, using as a receiver a photodiode....
This circuit has an automatic dynamic gain control in a range of 6 dB to 40 dB. We found it in...