Found in an Electronic Design of 1964, this circuit operates with control voltages from 0 to 12 V determining the duration of the pulses.
This stage for JFETs was found in a 1965 US publication, but is valid for modern components. |...
Figure 1 shows a low-pass filter using a 741 operational amplifier but other ICs can be used. The...
The components used in this 80's circuit are uncommon today. The circuit is intended for...