Title :
Wide gm adjustment range, highly linear OTA with linear programmable current mirrors
Author :
Ramirez-Angulo, J. ; Grau, I.
Author_Institution :
Dept. of Electr. & Comput. Eng., New Mexico State Univ., University Park, NM, USA
Abstract :
A highly linear OTA (operational transconductance amplifier) with very wide gm (transconductance gain) adjustment range is presented. It uses linear electronically programmable current mirrors and is appropriate for its implementation in bipolar or CMOS technology. Its bandwidth and input range remain approximately constant with gm adjustment and can be adjusted independently of gm. Experimental results using bipolar transistor arrays are presented which confirm the characteristics of the proposed structure. This structure is believed to overcome some of the practical limitations of the OTA, increasing its versatility as a building block in analog VLSI systems
Keywords :
bipolar integrated circuits; linear integrated circuits; operational amplifiers; CMOS technology; analog VLSI systems; bandwidth; bipolar technology; bipolar transistor arrays; linear OTA; linear programmable current mirrors; operational transconductance amplifier; transconductance gain adjustment range; Appropriate technology; Bipolar transistors; CMOS technology; Circuits; Mirrors; Open loop systems; Performance gain; Transconductance; Very large scale integration; Voltage;
Conference_Titel :
Circuits and Systems, 1992. ISCAS '92. Proceedings., 1992 IEEE International Symposium on
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-0593-0
DOI :
10.1109/ISCAS.1992.230248
