200 Hz Transistor Tunable Filter (CB1457E)
- Details
- Published: Wednesday, 11 March 2020 16:28
- Written by Newton C. Braga
This circuit is from a 1975 technical documentation on filters. The FET can be a BF245 and the bipolar BC558. The power supply must be symmetric. The components can be changed for operation at other frequencies. The rejection is 3 dB in a 10 Hz range.