Stereo FM Transmitter (CB8459E)

This circuit was found in a 90s Radio Electronics. The FM encoder or multiplexer is an uncommon component today.

Precision Bidirectional Current Sensor (CB5260E)
This circuit senses two-way currents serving to monitor battery charge and discharge. We find it...
Negative Voltage Generator (CB25844E)
This very low power circuit is based on the ICL7860. We found it in an Electronics Now from April...
CMOS Oscillator Using the 4002 (CB898E)
This circuit can generate signals up to 5 MHz according the power supply voltage. Frequency is...