This small signal amplifier circuit was found in Motorola's 1969 documentation. The FET and the transistor can be of any type and is battery powered since the consumption is very low.
This circuit with 5 times gain was found in European documentation from the 1980s. The input and...
We find this simple tone modulated signal generator in a 1987 publication. It uses common...
This circuit is from an ancient American documentation. The coil is frequency dependent and the...