LM3900 Rectangular Oscillator (CB25179E)

This 1 kHz oscillator uses a Norton LM3900 operating system. The frequency depends on C1 and R1 and can be changed.

Mixer LM3900 (CB13690E)
This 1975 documentation circuit must use a 6 to 9 V symmetrical source and the signal cables must...
Digital Gain Control for Operational (CB15010E)
With the circuit shown in the figure it is possible to digitally control the gain of an...
Varicap FM Receiver (CB17370E)
The audio amplifier integrated circuit used in this 1990 project is not very common today....