Of course, the current is extremely small, but a voltage of 300 V can be obtained from 9 V of a battery. The circuit is from an Electronics Now of May 1994. C1 adjusts the operating point.
The preamplifier using JFET presets a high input impedance and very low distortion. The input...
In this simulation we show how to implement a test circuit for BJT transistores. In the simulation we show a...
We found this audio amplifier stage with 500 ohms of input impedance in an old American...