Browsing by Author "Chin, SY"

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A CMOS ratio-independent and gain-insensitive algorithmic analog-to-digital converter
(1996-08-01)
Chin, SY
;
Wu, CY
;
電子工程學系及電子研究所
;
電控工程研究所
;
Department of Electronics Engineering and Institute of Electronics
This paper describes the design of a CMOS capacitor-ratio-independent and gain-insensitive algorithmic analog-to-digital (A/D) converter. Using the fully differential switched-capacitor technique, the A/D converter is insensitive to capacitor-ratio accuracy as well as finite gain and offset voltage of operational amplifiers. The switch-induced error voltage becomes the only major error source, which is further suppressed by the fully differential structure. The proposed A/D converter is designed and fabricated by 0.8 mu m double-poly double-metal CMOS technology. The op-amp gain is only 60 dB and no special layout care is done for capacitor matching. Experimental results have shown that 14-b resolution at the sampling frequency of 10 kHz can be achieved in the fabricated A/D converter. Thus it can be used in the applications which require low-cost high-resolution A/D conversion.
A CMOS ratio-independent and gain-insensitive algorithmic analog-to-digital converter
(1996-08-01)
Chin, SY
;
Wu, CY
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
This paper describes the design of a CMOS capacitor-ratio-independent and gain-insensitive algorithmic analog-to-digital (A/D) converter. Using the fully differential switched-capacitor technique, the A/D converter is insensitive to capacitor-ratio accuracy as well as finite gain and offset voltage of operational amplifiers. The switch-induced error voltage becomes the only major error source, which is further suppressed by the fully differential structure. The proposed A/D converter is designed and fabricated by 0.8 mu m double-poly double-metal CMOS technology. The op-amp gain is only 60 dB and no special layout care is done for capacitor matching. Experimental results have shown that 14-b resolution at the sampling frequency of 10 kHz can be achieved in the fabricated A/D converter. Thus it can be used in the applications which require low-cost high-resolution A/D conversion.