This circuit generates a sinusoidal signal with only -80 dB THD. The circuit was found in a 90's EDN. The frequency is 25 kHz and the components used are from that time.
This is basically the same circuit as the previous one, but using PNP transistors. In the original...
The output stage of this amplifier can operate at high voltage. The transistor must be a high...
This circuit has an input resistance of 100M ohms which makes it possible to detect currents as...