This amplifier for electrometer can work with currents of 0.1 pA in a band of 1 Hz. The circuit is from NASA in a publication of the 60s. Transistors are general purpose types.
We show an oscillator that produces rectangular TTL signals based on inverters. Inverters can also be...
We found this circuit in the March 1995 issue of Electronics Now magazine. The circuit has a...
This circuit, with an operational amplifier, was found in the Motorola Dataar Linear of 1990. The...