FET IF Amplifier (CB4289E)

In the figure we have an IF amplifier step using a MOSFET. The circuit was found in a 1980s documentation, intended for FM receivers of the time.

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Bipolar and Unijunction Multivibrator (CB18908E)
This circuit was found in European documentation from the 1980s. The unijunction may be 2N2646 and the...
AC Instrumentation amplifier (CB20987E)
This amplifier was found in Burr-Brown documentation from the 90's. The gain can be programmed by resistor...
Triac Crowbar protection (CB15496E)
In the circuit shown in the figure, when the input voltage rises to 27 V, the TL431 triggers the...