This detector with ultra-low deviation was found in an American documentation from the 90s. Operational amplifiers are from that time. The power supply must be symmetrical.
The voltage output of this circuit is 4 times the peak of the input voltage. Current depends on...
This voltage-controlled oscillator or VCO was found in a Radio Electronics magazine from July...
The LM11 operational amplifier is not common today. The circuit was obtained in the Linear...