Title :
A high-performance calibration-free charge balancing analog-to-digital converter
Author :
Sabouri, Faramarz ; Trofirnenkoff, F.N. ; Haslett, J.W.
Author_Institution :
Dept. of Electr. & Comput. Eng., Calgary Univ., Alta., Canada
fDate :
10/1/1996 12:00:00 AM
Abstract :
This paper describes a robust charge-balancing analog-to-digital converter (ADC) for dc-voltage measuring applications. The converter, utilizing a continuous-time chopper-stabilized pulse-width modulator, has achieved an absolute accuracy of 20 bits at room temperature, without any trimming or calibration. Within a temperature range of -50°C to 125°C, the accuracy changes with a temperature coefficient of 0.05 ppm/°C. The modulator is implemented by employing commercial discrete components
Keywords :
analogue-digital conversion; error compensation; modulators; performance evaluation; pulse width modulation; stability; voltage measurement; -50 to 125 C; ADC; absolute accuracy; charge balancing analog-to-digital converter; commercial discrete components; continuous-time chopper-stabilized pulse-width modulator; dc-voltage measuring applications; temperature coefficient; Analog-digital conversion; Delta modulation; Digital modulation; Frequency; Pulse modulation; Pulse width modulation; Space vector pulse width modulation; Temperature distribution; Temperature sensors; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
