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.
This simple digital frequency meter using CMOS circuits reaches 5 MHz frequency. Input signals are...
This signal injector and tracer (follower) was found in an old American documentation. The...
This circuit utilizes a precision operational amplifier that can be replaced with an equivalent. The...