This circuit was obtained in a 1975 documentation. The maximum frequency depends on the diodes and the FET. Type 1N34 diodes and a FET BF245 can be used for frequencies up to 100 MHz.
This low frequency circuit was found in documentation from the 1980s. The values of R and C...
This circuit has a frequency range of 30 Hz to 100 kHz with an output signal of 1 Vrms. We found...
Found in Popular Electronics from the 90s, this circuit uses still common components. Its power is 20...