Title :
Digital source for a new impedance bridge
Author :
Field, B.F. ; Oldham, N.M.
Author_Institution :
Nat. Inst. of Stand. & Technol., Gaithersburg, MD, USA
Abstract :
A digitally synthesized source designed to provide two sinewave outputs with an accurately known adjustable phase shift in the second channel is described. A brief description is given of the bridge with which it will be used. The source requirements and design are discussed. A testbed wire-wrapped version demonstrates stability and noise of 0.5 p.p.m. (r.m.s.) over a 1-h period.<>
Keywords :
bridge instruments; calibration; electric impedance measurement; frequency synthesizers; function generators; adjustable phase shift; digital source; digitally synthesized source; impedance bridge; induction standards; noise; sinewave outputs; stability; testbed wire-wrapped version; Bridge circuits; Calibration; Decision support systems; Detectors; Impedance; Inductance measurement; NIST; Phase detection; Read only memory; Voltage;
Conference_Titel :
Precision Electromagnetic Measurements, 1990. CPEM '90 Digest., Conference on
Conference_Location :
Ottawa, Ontario, Canada
DOI :
10.1109/CPEM.1990.109907
