This circuit of a few watts of power shows a typical configuration from the 70s using driver and output transformers. Output transistors must use a heatsink.
We found this circuit in a technical documentation from Texas Instruments. It interfaces a...
This amplifier for electrometer can work with currents of 0.1 pA in a band of 1 Hz. The circuit is...
We found this transistor circuit in a 1967 General Electric documentation. The circuit makes use of...