This 80's circuit has been winning. It is a 1 000 gain sample and hold circuit and an offset current setting. The configuration can be adapted to operate with modern equivalent components.
The circuit shown in the figure consists of a fixed buck regulator using the MIC23021 integrated circuit...
This circuit can generate signals from 100 kHz to 1 MHz depending on the L1 coil. For the medium...
The configuration below, which can be implemented with other operators, is from the National...