This simple logic level tester was found in Radio Electronics from the 90s. The inverters are of the 4009 type and the power comes from the circuit being analyzed.
This low noise preamplifier has a gain of 19 dB in the 30 MHz band. The circuit is from the 80s....
The purpose of the strobe circuit in this sensor amplifier is to reduce consumption. The circuit is...
The amplifier gain shown in the figure is given by R1. The circuit is valid for other photodiodes and is...