Summary
International Technical Conference on Circuits/Systems, Computers and Communications
2008
Session Number:C5
Session:
Number:C5-1
A Wideband Voltage Controlled Operational Transconductance Amplifier
Yun-Mi Na, Sung-Ho Yun, Hyeong-Woo Cha,
pp.-
Publication Date:2008/7/7
Online ISSN:2188-5079
Summary:
A wideband voltage controlled operational transconductance amplifier(OTA) for a high-accuracy linear voltage controlled analog systems was designed. The OTA consists of a wideband voltage-to-current converter (VIC) and conventional OTA as shown in Fig.1. The wideband VIC using an adaptive current feedback also was designed. For verification of the performance of the proposed OTA using wideband VIC, we simulated the circuits of the commercial OTA LM13600 and OTA using conventional VIC with the same simulation condition. The simulation result shows that the proposed OTA has a control voltage range with -5.0V to 4.0V (current range with 0μA to 10mA) at supply voltage ±5.0V. The LM13600 and OTA using conventional VIC have the control voltage range with -3.6V to 5.0V and -5.0V to -2.4V, respectively.