This amplifier was found in a 70s documentation. The product gain x bandwidth is 350 MHz. The integrated circuit is from that time, uncommon today.
With this circuit it is possible to obtain an input resistance of 100Gohms for a multimeter, with...
This amplifier, to detect biological signals in implanted transmitters, uses transistors such as...
This application is not modern since few computers have parallel ports. But you can use this...