Medium impedance stage (CB20563E)

We found this circuit in an English publication from 1963. The circuit uses germanium transistors of the time.

Varicap VCO (CB870E)
This voltage controlled oscillator uses a varicap to change the frequency. Usin a 100 turns coil...
Current Sensor Shield (CB5231E)
This circuit includes an AD converter for interfacing with a microprocessor and can be used as a...
Automotive Power Drive (CB25416E)
The illustrated circuit uses the AUIRS2301 S from International Recfifier (www.irf.com) and is...