Colpitts CMOS Oscillator (CB22397E)

This is the basic configuration of a Colpitts LC oscillator using a CMOS gate.

Sinusoidal to Square Converter (CB12150E)
This circuit uses a JFET CA3140 operational amplifier to convert a low frequency sinusoidal signal...
1 W amplifier with the LM390 (CB13753E)
This circuit is from the National Semiconductor Audio Handbook. The amplifier operates with 6 V...
Headphone Amplifier (CB24050E)
This simple amplifier was found in a Radio Electronics magazine from July 1970. The transistors are...