Suggested by Fairchild in a 1980s publication, this multiplier uses operational amplifiers from that time. The power supply must be symmetrical.
This short-range experimental transmitter emits a signal with many harmonics, without modulation. It can...
This circuit is from a 1977 publication and is characterized by an adjustment of the polarization point of...
This VFO was found in a 1980s documentation. The central frequency is given by the crystal and the...