Title :
Effect of switch charge injection on ΣΔ modulator
Author :
Xu, Yong-Ping ; Rigby, Graham ; Starr, Matthew
Author_Institution :
Sch. of Electr. Eng., New South Wales Univ., Sydney, NSW, Australia
Abstract :
The effect of switch charge injection on a second-order ΣΔ modulator has been investigated. It has been found that the switch charge injection can cause an error at the output of the SC integrator and that this integrator error can significantly degrade the dynamic range of the oversampling ΣΔ modulator. The integrator error depends on the switch and the integrating capacitor sizes and the common-mode rejection performance of the op-amp. The differential signal at the input of the modulator can also affect the switch charge injection
Keywords :
error analysis; integrating circuits; modulators; operational amplifiers; sigma-delta modulation; switched capacitor networks; SC integrator output error; common-mode rejection performance; differential signal; dynamic range; op-amp; oversampling modulator; second-order ΣΔ modulator; sigma-delta modulator; switch charge injection; Australia; Capacitors; Clocks; Degradation; Delta modulation; Dynamic range; Noise shaping; Operational amplifiers; Switches; Voltage;
Conference_Titel :
Microelectronics and VLSI, 1995. TENCON '95., IEEE Region 10 International Conference on
Print_ISBN :
0-7803-2624-5
DOI :
10.1109/TENCON.1995.496354
