This circuit protects galvanometers that are excited by low impedance amplifiers. The circuit is from na old Electronic Design. The components are from the era.
This circuit was obtained in Motorola documentation from 1969. The components are from that time. In...
We found this circuit in a Poptronics of the 90s. The circuit operates from 100 kHz to 30 MHz and...
We found this amplifier with 50 MΩ input resistance in the May 1989 Radio Electronics magazine. The...