Title :
A sensitive analog comparator
Author :
Schoenwetter, H.K.
Author_Institution :
Electricity & Electrosystems Div., NBS, Washington, DC, USA
Abstract :
A strobed, sensitive analog comparator has been developed for use in the NBS Data Converter Test Facility. The comparator has a sensitivity of 1.5 μV and a response time of 30 μs to within 10 μV, following input steps up to 20 V. Signal voltages up to ±10 V are compared with reference voltage levels of opposite polarity, using a precision resistive divider. The input offset has a temperature coefficient of -1 μV/°C and changes less than ±5 μV under worst case dynamic conditions. Following a strobe pulse, the digital output is retained until the next strobe pulse. Optical isolators provide isolation between the analog and digital circuits.
Keywords :
analogue-digital conversion; comparators (circuits); digital-analogue conversion; measurement standards; test facilities; A/D convertor; D/A convertor; NBS Data Converter Test Facility; strobed analogue comparator; Limiting; Noise; Schottky diodes; Sensitivity; Switches; Transient analysis; Voltage measurement; Analog comparator; comparator; overdrive; settling time measurements; strobed comparator; voltage comparator; voltage limiting;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.1982.6312486
