Gain 10 Voltage Amplifier (T456E)

This 4-stage circuit has a voltage gain of 10 and negative feedback. The circuit was found in an old MIT publication.

Zero crossing detector (CB3887E)
This circuit appears in several configurations in this site. This is from American documentation from...
STK984 190E Integrated Power Module (COM160E)
November 2016 - Mouser Electronics is making available the new N Semiconductor STK984-190E power...
Heterodyne Mixer (CB4291E)
This is a typical 80's FM radio mixer circuit. The circuit was found in a documentation of the...