This amplifier was found in Burr-Brown documentation from the 90's. The gain can be programmed by resistor Rg as per the table given in the diagram. The power supply must be symmetrical.
Found in documentation from the 70s, this circuit uses components from that time. Some of these...
This circuit is intended for recording conversations by amateur radio, being activated by the...
This circuit was obtained in an old Elektor and can be adapted to use white power LEDs. The...