For Full-Text PDF, please login, if you are a member of IEICE,|
or go to Pay Per View on menu list, if you are a nonmember of IEICE.
An Integrated Wideband Operational Transconductance Amplifier with Complementary Slew-Rate Enhancer
Deng-Fong LU Chin HSIA Kun-Chu LEE
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2020/01/01
Online ISSN: 1745-1337
Type of Manuscript: Special Section LETTER (Special Section on Wideband Systems)
wideband OTA, low power, slew-rate,
Full Text: PDF(1.7MB)>>
The paper presents a low power, wideband operational trans-conductance amplifier (OTA) for applications to drive large capacitive loads. In order to satisfy the low static power dissipation, high-speed, while reserving high current driving capability, the complementary slew-rate enhancer in conjunction with a dual class AB input stage to improve the slew-rate of a rail-to-rail two-stage OTA is proposed. The proposed architecture was implemented using 0.5µm CMOS process with a supply voltage of 5V. The slew-rate can achieve 68V/µsec at static power dissipation of 0.9mW, which can be used to efficiently drive larger than 6 nF capacitive load. The measured output has a total harmonic distortion of less than 5%.