This circuit is from Motorola's 1990 Linear Databook. We can implement it with other operational amplifier. The power supply must be symmetrical.
This circuit was obtained in a 1990 English magazine. The circuit can be assembled with equivalent power...
Varactor diodes are our varicaps of today. This circuit for switching signals in an RF circuit was found...
This basic circuit was found in RCA / GE documentation from the 90s. In it we have the way to...