This circuit with RIAA equalization is from 1985 US documentation. The circuit has a flat response of 150 Hz to 40 kHz. The power supply must be symmetrical.
This circuit was found in a Texas Instruments handbook about operational amplifier. It has a very...
The purpose of this circuit is to enable testing of transistors using a common multimeter. With the...
This circuit was found on an 80's Ham Radio. The transistor admits equivalent. The circuit can...