This circuit is from an ancient American documentation. The integrated circuit is 741 and the power supply must be symmetrical. The passing band is centered at 1 kHz.
This bidirectional current sensing circuit was found in a 2005 Linear Technology application manual....
This fixed current source uses a Norton LM3900 amplifier. The maximum current depends on the...
This interesting circuit of an ancient American publication makes the pattern of an exclamation mark...