but using those to find fault in a circuit built for learning is beside the point. He demonstrated it in use, and even goes as far as to show it running an audio power amplifier driving a small ...

It’s a conventional tube amplifier circuit in which the triode is a preamplifier for the pentode power output stage. The pentode is running in class A mode, and the high impedance of its output ...

Noise analysis is very important in many analog and RF receiver circuit design since the received signals are very weak. In case of differential amplifiers the noise appear as common mode signal and ...