A low-voltage/low-power second-order ΔΣ modulator with signal adaptive control architecture

Author

Li, Qunying ; Van der Spiegel, Jan ; Laker, Kenneth R.

Author_Institution

Dept. of Electr. Eng., Pennsylvania Univ., Philadelphia, PA, USA

Volume

2

fYear

1999

fDate

36342

Firstpage

41

Abstract

A Signal Adaptive Control (SAG) architecture for a second-order ΔΣ modulator (ΔΣM) design is presented. The proposed architecture effectively reduces the power dissipation and the harmonic distortion of the first stage integrator in the modulator. The essence of this architecture, is to switch off the DAC feedback signal to the first stage during some iterations, and to compensate the signal at the input of the second stage, in an adaptive manner. Transistor-level simulations have shown the feasibility of this architecture

Keywords

CMOS integrated circuits; adaptive control; circuit feedback; delta-sigma modulation; harmonic distortion; low-power electronics; DAC feedback signal; LV delta-sigma modulator; first stage integrator; harmonic distortion reduction; low-power ΔΣ modulator; low-voltage operation; power dissipation reduction; second-order ΔΣ modulator; signal adaptive control architecture; transistor-level simulations; Adaptive control; Capacitance; Capacitors; Circuit noise; Delta modulation; Dynamic range; Power dissipation; Signal design; Switches; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on

Conference_Location

Orlando, FL

Print_ISBN

0-7803-5471-0

Type

conf

DOI

10.1109/ISCAS.1999.780614

Filename

780614