Title :
A novel double sampled chopper stabilised integrator for switched capacitor ΣΔ modulators
Author :
O´Connell, I.J. ; Lyden, Colin
Author_Institution :
Dept. of Microelectron., Univ. Coll. Cork, Ireland
Abstract :
A fully floating double sampled chopper stabilised integrator is proposed, with redundant switches removed. The fully floating arrangement moving sums the input to the switched capacitor integrator. The ΣΔ modulator loop is modified to counteract the moving sum effect on the feedback signal such that the noise shaping performance remains unchanged.
Keywords :
choppers (circuits); circuit feedback; circuit stability; integrating circuits; modulators; sigma-delta modulation; switched capacitor networks; ΣΔ modulator loop modification; SC sigma-delta modulator; chopper stabilised integrator; double sampled integrator; feedback signal; fully floating arrangement; moving sum effect; noise shaping performance; switched capacitor integrator; Capacitors; Choppers; Circuits; Feedback loop; Frequency; Low-frequency noise; Noise shaping; Operational amplifiers; Sampling methods; Switches;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1010532
