Title :
Programmable precision IVD for the audio frequency range
Author :
Melcher, Jiirgen
Author_Institution :
Phys.-Tech. Bundesanstalt, Braunschweig, Germany
fDate :
4/1/1993 12:00:00 AM
Abstract :
A programmable 22-bit inductive voltage divider (IVD) for the frequency range from 100 Hz to 10 kHz is described. The design consists of a two-stage transformer for the higher six bits, a one-stage transformer for the next four bits and a multiplying DA converter for the lower 12 bits. The in-phase and quadrature errors of the two-stage transformer which constitute the largest part of the overall error were smaller than 2×10-6 and 3×10-6 at 10 kHz and smaller than 2×10-7 and 5×10-7 at 120 Hz
Keywords :
measurement errors; measurement standards; potential transformers; voltage dividers; voltage measurement; 100 Hz to 10 kHz; audio frequency; automatic bridge; in-phase errors; inductive voltage divider; multiplying DA converter; one-stage transformer; programmable voltage divider; quadrature errors; two-stage transformer; voltage standards; Bridge circuits; Calibration; Coaxial cables; Contact resistance; Frequency conversion; Impedance; Magnetic shielding; Relays; Switches; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
