We find this circuit in American documentation from the 1980s. It consists of a frequency folder using a varicap. The capacitors and coils depend on the frequency of operation.
In the figure we have a modified multiplier circuit that can operate with the sextuplicator with...
This amplifier with an OTA has a gain of 40 dB. The power supply must be symmetrical. Found in...
This circuit uses a diode as a sensor, activating a relay when a certain temperature is reached. The...