We found this circuit in a 1982 documentation. It uses a CA3140 or equivalent operational amplifier and does not require a symmetrical source. The output is 1 Vpp wide.
This receiver using a FET appeared in a November 1957 Radio Electronics magazine. It is one of the...
Found in a 1968 publication, this circuit generates signals with the waveforms shown next to the...
Currents of a few tens of milliamps can be obtained with this simple source that makes use of an...