CA3080 Amplifier (CB25131E)

This amplifier with an OTA has a gain of 40 dB. The power supply must be symmetrical. Found in Radio Electronics, May 1988.

1 kHz High Pass Filter (CB1452E)
This filter has a cut-off frequency of 1 kHz by letting pass those that are above this value. The...
Simple Multimeter (CB14965E)
The presented circuit measures currents and voltages with precision that depends on the tolerance of...
TTL Opto Trigger (CB14670E)
This Texas Instruments circuit uses a phototransistor to fire a TTL trigger port. Other...