Suggested by Mullard in an old documentation, this circuit is based on a common phototransistor and on transistors that may be the modern BC548.
The LMV321 is a low voltage operational amplifier from ON Semiconductor. The following diagram,...
This circuit was found in Motorola documentation from 1968. The transistors are from the company,...
A simple VCO using two inverters in a ring configuration is shown here. A VCO is a circuit in...