Title :
A wideband sampling voltmeter
Author :
Souders, T. Michael ; Waltrip, Bryan Cristopher ; Laug, Owen B. ; Deyst, J.P.
Author_Institution :
Dept. of Commerce, Nat. Inst. of Stand. & Technol., Gaithersburg, MD, USA
fDate :
8/1/1997 12:00:00 AM
Abstract :
A high-accuracy sampling voltmeter, designed to span the frequency range of 10 Hz-200 MHz, is described. The instrument operates autonomously, at a measurement update rate of at least one per second. A novel quasiequivalent time sampling process is used, with a custom strobed comparator as the sampling device and decision element. The architecture and control are presented, along with the time-base design principles. Major error sources associated with the time-base are also discussed
Keywords :
analogue-digital conversion; comparators (circuits); digital-analogue conversion; error analysis; feedback; signal sampling; time bases; voltage measurement; voltmeters; 10 Hz to 200 MHz; 2.3 GHz; DAC; NIST; custom strobed comparator; decision element; error sources; feedback; quasiequivalent time sampling process; sampling device; time-base design; wideband sampling voltmeter; Bandwidth; Error correction; Frequency measurement; Instruments; NIST; Quantization; Sampling methods; Signal sampling; Voltmeters; Wideband;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
