Title :
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
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;
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
DOI :
10.1109/ISCAS.1999.780614
