4-scale millivoltmeter (CB7389E)

Found in Radio Electronics from the 90's, this circuit can be implemented with other operational amplifiers. The power supply is symmetrical.

| Clique na imagem para ampliar |

Nonlinear Sawtooth Generator (CB25677E)
Using one unijunction transistor and two bipolar transistors, this circuit generates a signal from...
RIAA Preamplifier II (CB938E)
This circuit makes the RIAA equalization for signals obtained from a turntable for signal recovery in other...
Isolation Circuit for RS-232 (CB12773E)
In critical applications of the RS-232 interface, the danger of induced voltages in the cables must...