This circuit is from Motorola's 1990 Linear Databook. We can implement it with other operational amplifier. The power supply must be symmetrical.
This dual balanced modulator configuration was obtained in a 1980s telecommunications...
Of course, the range of this transmitter found in a 1992 documentation is not exactly 4 km, as it...
This circuit can be used to measure the frequency of a low frequency square signal. The signal can be...