This sensitive two-transistor circuit was found in the June 1965 Radio Electronics magazine. The circuit has low drift and uses an analog instrument. The input resistance is high.
) This circuit was found in a 80’s Popular Electronics. It issues a warning signal with the signal...
Based on the LM101A we have this amplifier for instrumentation with a gain of 100. This gain is...
The integrated circuits used in this 1989 project are uncommon today, including the IF coil that...