Title :
A CMOS OTA free from second order effects with a high input resistance Gm control terminal
Author :
Ibaragi, E. ; Nishioka, S. ; Hyogo, A. ; Sekine, Keisuke
Author_Institution :
Sci. Univ. of Tokyo, Japan
Abstract :
This paper proposes a CMOS OTA free from second order effects such as mobility reduction and body effects. The conventional OTA free from second order effects has a problem that the input resistance of transconductance control terminal is considerably low. When OTA-C filters are designed, many OTA transconductances are controlled by one voltage in order to tune their characteristics such as cut-off frequency and quality factor. Thus, the voltage source to control transconductance must have high current drive ability. The proposed OTA is based on the conventional approach, and it has a high input resistance transconductance control terminal
Keywords :
CMOS analogue integrated circuits; Q-factor; operational amplifiers; CMOS OTA; current drive ability; cut-off frequency; high input resistance Gm control terminal; quality factor; voltage source to control transconductance; CMOS technology; Circuits; Filters; Immune system; MOSFETs; Q factor; Signal processing; Transconductance; Transfer functions; Voltage control;
Conference_Titel :
Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on
Print_ISBN :
0-7803-6685-9
DOI :
10.1109/ISCAS.2001.921852
