Operating in class AB1, this high-fidelity amplifier was found in the 1961 RCA tube manual. The circuit has high input impedance and good gain.
The operational amplifier is old. The circuit is from an 80's documentation but can be designed...
The connection of high-value input resistors causes the circuit to behave like a conventional...
We find this encoding circuit in an American 1980s amateur radio documentation. The circuit can be...