Analysis of the dynamic behavior of a charge-transfer amplifier

Charge transfer amplifiers (CTAs) have recently emerged as a topic of interest in low-power data converter applications. Due to the clocked phase operation, a CTA's dynamic performance is difficult to analyze and to optimize. This paper provides an analysis of the dynamic behavior of a recently reported charge transfer amplifier intended for analog-to-digital converter (ADC) application. Results of the analysis are verified by SPICE simulations and by characterization data taken from 0.6 /spl mu/m CMOS test cells.

[1]  Hisham Z. Massoud,et al.  Measurement and modeling of charge feedthrough in n-channel MOS analog switches , 1985 .

[2]  A. Dingwall,et al.  An 8-MHz CMOS subranging 8-bit A/D converter , 1985, IEEE Journal of Solid-State Circuits.

[3]  Akira Matsuzawa,et al.  A 10-b 20-MHz 30-mW pipelined interpolating CMOS ADC , 1993 .

[4]  Toshio Kumamoto,et al.  A 10 bit 20 MS/s 3 V supply CMOS A/D converter , 1994 .

[5]  Robert F. Pierret,et al.  Semiconductor device fundamentals , 1996 .

[6]  Daniele D. Caviglia,et al.  Analysis of the behavior of a dynamic latch comparator , 1998 .

[7]  Dong-Young Chang,et al.  Design techniques for a low-power low-cost CMOS A/D converter , 1998 .

[8]  T. Shibata,et al.  CMOS charge-transfer preamplifier for offset-fluctuation cancellation in low-power A/D converters , 1998, IEEE J. Solid State Circuits.

[9]  B. P. Brandt,et al.  A 75-mW, 10-b, 20-MSPS CMOS subranging ADC with 9.5 effective bits at Nyquist , 1999, IEEE J. Solid State Circuits.

[10]  R. Remmers,et al.  A 3.3 V 10 b 25 Msample/s two-step ADC in 0.35 /spl mu/m CMOS , 1999, 1999 IEEE International Solid-State Circuits Conference. Digest of Technical Papers. ISSCC. First Edition (Cat. No.99CH36278).

[11]  T. Ohmi Feedback charge-transfer comparator with zero static power , 1999, 1999 IEEE International Solid-State Circuits Conference. Digest of Technical Papers. ISSCC. First Edition (Cat. No.99CH36278).

[12]  D.T. Comer,et al.  Ultra low power A/D converters using an enhanced differential charge-transfer amplifier , 2000, Proceedings of the 26th European Solid-State Circuits Conference.