Title :
Current mode approach to ΣΔ modulators
Author :
Wawryn, Krzysztof
Abstract :
This paper presents an approach to ΣΔ modulators relying on current mode sampled data circuits with switched transconductances. The ΣΔ modulator structures are composed of current mode building blocks with transconductance amplifiers and capacitors. All building blocks and three different ΣΔ structures-first-order, second-order and multistage-are designed and simulated by using VLSISPICE COMPASS DESIGN programs on a SUNSPARC20 computer and then manufactured via Eurochip service center in 0.7 μm ES2 digital process to verify the proposed concept
Keywords :
CMOS integrated circuits; circuit CAD; modulators; sampled data circuits; sigma-delta modulation; ΣΔ modulator structures; 0.7 micron; ES2 digital process; Eurochip service center; SUNSPARC20 computer; VLSISPICE COMPASS DESIGN programs; current mode building blocks; current mode sampled data circuits; first-order type; multistage type; second-order type; sigma-delta modulators; switched transconductances; transconductance amplifiers; Capacitors; Circuit simulation; Computational modeling; Computer aided manufacturing; Computer simulation; Manufacturing processes; Sampled data circuits; Switching circuits; Transconductance; Virtual manufacturing;
Conference_Titel :
Circuits and Systems, 1998. ISCAS '98. Proceedings of the 1998 IEEE International Symposium on
Print_ISBN :
0-7803-4455-3
DOI :
10.1109/ISCAS.1998.704451
