Found in Texas Instruments documentation from the 90's, this circuit can be used as a shield due its symmetrical power is 5 V. The circuit has offset adjustment and a pass band of 200 kHz.
This circuit allows you to modify the resolution of a measurement bridge. It was found in the...
In the figure we have a three-phase AC motor control for voltages up to 600 V or 1200 V depending on...
This small experimental transmitter with the CK722 transistors was found in Radio Electronics...