This high impedance step suggested by an English publication can operate up to 1 MHz with 1 V rms output. Input impedance is 1 M ohm.
The circuit presented uses the high-power operational amplifier LM12, which is currently not an...
Suggested by Philips documentation from 1968, this circuit uses components from the era that can...
This highly sensitive circuit causes one relay to be closed when the other is open or still...