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.

S meter (CB1439E )
This S-meter circuit was found in a 1976 publication. The circuit is used to measure the signal...
Magnetic Phonocaptor Preamplifier (CB16663E)
Several versions of this circuit can be found on this website. This makes use of FETs that can...
Frequency Modulated Siren 555 CMOS (CB15868E)
With the circuit shown in the figure we have a frequency modulation which is produced by a...