A low-noise chopper-stabilized differential switched-capacitor filtering technique

Describes the implementation of a wide dynamic range voiceband switched-capacitor filter using a differential chopper-stabilized configuration. The noise behavior of switched-capacitor filters is discussed qualitatively, and the effects of the chopper stabilization on the noise performance is analyzed. Experimental results from a fifth-order low-pass voiceband prototype are presented.

[1]  P.R. Gray,et al.  A precision low-power PCM channel filter with on-chip power supply regulation , 1980, IEEE Journal of Solid-State Circuits.

[2]  D.J. Allstot,et al.  A high performance low power CMOS channel filter , 1980, IEEE Journal of Solid-State Circuits.

[3]  S. P. Emmons,et al.  Noise in buried channel charge-coupled devices , 1976, IEEE Transactions on Electron Devices.

[4]  R.W. Brodersen,et al.  MOS switched capacitor ladder filters , 1978, IEEE Journal of Solid-State Circuits.

[5]  B. Baylac,et al.  Low-level MOS transistor amplifier using storage techniques , 1973 .

[6]  A. Knob,et al.  Noise generated in switched capacitor networks , 1980 .

[7]  Cl.-A. Gobet,et al.  Noise analysis of switched capacitor networks , 1983 .

[8]  W. Black,et al.  CMOS PCM channel filter , 1980, 1980 IEEE International Solid-State Circuits Conference. Digest of Technical Papers.

[9]  I.A. Young.  A low-power NMOS transmit/receive IC filter for PCM telephony , 1980, IEEE Journal of Solid-State Circuits.