This old amplifying stage was found in radios and small amplifiers of the time. The circuit is from Mullard's transistor reference manual.
The figure shows a way to apply gain control to the LM3600 OTA. The circuit is from a Radio...
This interesting circuit of a 1988 documentation consists of a mouse trap where the sensor is left to...
A small voltage-boosting transformer is used in this pulse generator circuit found in...