Title :
A new approach for the design of CMOS voltage buffers for switched-capacitor and gm-C filters
Author :
Barúqui, Fernando A P ; Petraglia, Antonio
Author_Institution :
COPPE, Fed. Univ. of Rio de Janeiro, Rio de Janeiro, Brazil
Abstract :
Buffers are widely employed as basic building blocks in time delay lines and in interfacing integrated circuits with the external world. This paper presents a new CMOS analog fully differential voltage buffer developed for minimum power consumption, large dynamic range and low harmonic distortion. Its design is based on the use of cross-coupled input differential pairs and internal current feedback. Two design approaches are proposed: one for switched-capacitor circuits and the other for gm-C circuits. Illustrative design examples are developed for a 0.35 - "m"m CMOS technology using a power supply voltage of 2.5 V. Spice simulations using BSIM3 device models are shown to support the theory.
Keywords :
CMOS analogue integrated circuits; harmonic distortion; network synthesis; switched capacitor filters; CMOS analog circuits; CMOS technology; CMOS voltage buffers; harmonic distortion; power consumption; power supply voltage; switched-capacitor; time delay lines; voltage 2.5 V; CMOS technology; Delay effects; Dynamic range; Energy consumption; Feedback; Harmonic distortion; Power harmonic filters; Power supplies; Switched capacitor circuits; Voltage;
Conference_Titel :
Circuits and Systems, 2009. ISCAS 2009. IEEE International Symposium on
Conference_Location :
Taipei
Print_ISBN :
978-1-4244-3827-3
Electronic_ISBN :
978-1-4244-3828-0
DOI :
10.1109/ISCAS.2009.5118426
