This circuit makes use of a 741 single source operational amplifier to measure resistors on a linear scale. The circuit may use as an indicator a common multimeter on a low current range.
In the figure we have the way to use power transistors as rectifiers in a source, replacing common...
This circuit is based on a Texas Instruments LinMOS integrated circuit consisting of an...
In fact, it is a RF field indicator with an operational amplifier equivalent to the 741. This...