Title :
Switched-capacitors versus switched-currents: a theoretical comparison [in CMOS]
Author :
Hughes, John B. ; Worapishet, Apisak ; Toumazou, Chris
Author_Institution :
Philips Res. Lab., Redhill, UK
Abstract :
A comparative study between switched-capacitors (SC) and switched-current (SI), using speed, power and signal-to-noise-ratio as performance vectors, is presented. To no one´s surprise, the analysis suggests that SC outperforms SI considerably for the past and present technologies. However, as processing heads towards lower power supply voltages the performance of SC falls steadily while that of SI remains almost constant. Ultimately, there is a fundamental tendency for the performance gap between SC and SI to steadily reduce and SI performance is expected to match and surpass that of SC during the course of the next decade
Keywords :
CMOS analogue integrated circuits; sample and hold circuits; switched capacitor networks; switched current circuits; power performance; power supply voltages; signal-to-noise-ratio; speed performance; switched-capacitor networks; switched-current networks; Buffer storage; Circuits; Educational institutions; Frequency; Head; Laboratories; MOSFETs; Performance analysis; Sampling methods; Vehicles;
Conference_Titel :
Circuits and Systems, 2000. Proceedings. ISCAS 2000 Geneva. The 2000 IEEE International Symposium on
Conference_Location :
Geneva
Print_ISBN :
0-7803-5482-6
DOI :
10.1109/ISCAS.2000.856351