This simple bridge circuit can be used for impedance or resistance measurement using a high impedance earphone as an indicator. The circuit is from an American 80's documentation.
This circuit uses the LT6106 from Linear Technology, from where we took it from a 2005 manual....
January 2017 - Texas Instruments is making available through Mouser Electronics the new Buck...
This circuit was found in an old manual of linear integrated circuits of the 80's. Equivalent...