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 circuit produces two signals with inverted phases. One is taken for the emitter of Q1 and the...
This circuit is from an Electronic Design of the 90's. The circuit can be implemented with more...
We find this circuit in an 80's EDN. The circuit can be used with equivalent operational,...