This circuit was found in a 1980s documentation for amateur radio. The circuit is for 9 MHz signals and values in parentheses for FI of 455 kHz. The circuit can be adapted to other frequencies.
This circuit was found in a 1997 magazine. It uses a CMOS 4060 circuit powered by 12 V which is...
This circuit is from the Motorola Linear Databook of 1990. The values of the components depend on the...
This circuit uses a FET and a BJT to give a x300 gain for the input signal. So a 50 mV signal at...