This circuit was obtained from the March 1994 Electronics Now magazine. The circuit uses a common transistor which can be a low noise type such as the BC549.
This JFET amplifier was found in documentation from 1958. The circuit has voltage gain of 4 and 10...
This circuit was found in a 1969 Mullard documentation. Used transistors can be replaced with...
In the figure we have a high input impedance stage with a general purpose PNP transistor. An NPN transistor...