The figure shows the equivalent circuit for the LM381 audio preamplifier IC. The circuit was found in the February 1990 issue of Radio Electronics magazine.
This one is from an 80's EDN. Transistors can be general purpose types. The frequency is...
This power supply is not protected from shorts in the output. Output voltage is given by the...
This static switch or electronic contactor was found in a 1968 Motorola publication. The triac...