|Title||Simple Phase-Sensitive Detector for Wheatstone Bridge Resistance Measurements|
|Publication Type||Journal Article|
|LBNL Report Number||LBL-18002|
|Year of Publication||1985|
|Authors||DiBartolomeo, Dennis L., and Joseph H. Klems|
|Journal||Review of Scientific Instruments|
A simple and economical phase-sensitive detector circuit is described. The circuit, which was developed for use with large-area heat-flow sensors that employ resistance temperature detection, uses a synchronous rectifier driven by a square wave. It is shown that the circuit has good linearity, resolution, and immunity to external and internal noise.