Title :
Multipath common-mode feedback scheme suitable for high-frequency two-stage amplifiers
Author :
Gupta, A.K. ; Dhanasekaran, V. ; Soundarapandian, Karthikeyan ; Sanchez-Sinencio, E.
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., Dallas, TX, USA
fDate :
4/27/2006 12:00:00 AM
Abstract :
A method for stabilising the common-mode feedback (CMFB) loop in high-speed fully differential two-stage amplifiers is presented. Existing approaches may prove to be inadequate for high-speed designs. The problem becomes acute because of positive DC feedback by external network, which leads to ´latching states´. The proposed multipath approach avoids the latching states while maintaining the stability of the CMFB loop.
Keywords :
HF amplifiers; circuit feedback; differential amplifiers; integrated circuit design; differential two-stage amplifiers; high-frequency amplifiers; latching states; multipath common-mode feedback scheme; positive DC feedback;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20060454
