Found in Exar documentation from the 1980s, this circuit has a 60 dB cutoff at 1800 Hz. The circuit can be adapted to operate at other frequencies.
In the diagram we show how to divide the frequency by multiples of 10 using several CMOS...
The integrated circuit used in this application is a double 741 from SGS. The supply must be...
This circuit was found in a 1978 English magazine. It is a configuration that aims to select the...