This circuit was suggested by Signetics in 1980s documentation. The circuit makes use of the hard-to-obtain component of our day. It is for reference only.
Figure 1 shows a low-pass filter using a 741 operational amplifier but other ICs can be used. The...
November 2016 - Mouser Electronics has in stock the new TC9400, Voltage-to-Frequency Converter...
TTL square signals can be divided by 10 using this circuit. The maximum frequency depends on the...