DocumentCode
3607615
Title
A 
Hybrid OTA Driving 15 nF Capacitive Load With 1.46 MHz GBW
Author
Kai Ho Mak ; Ming Wai Lau ; Jianping Guo ; Tin Wai Mui ; Ho, Marco ; Wang Ling Goh ; Ka Nang Leung
Author_Institution
Dept. of Electron. Eng., Chinese Univ. of Hong Kong, Hong Kong, China
Volume
50
Issue
11
fYear
2015
Firstpage
2750
Lastpage
2757
Abstract
A cascade structure of six proposed signal-current enhancers is applied to a standard operational transconductance amplifier (OTA) to improve its gain-bandwidth (GBW) product, slew rate (SR), and voltage gain through significant enhancements of the small-signal and transient output currents from the proposed enhancers. The proposed hybrid OTA is implemented in a standard 0.13 μm CMOS technology, with an active chip area of 0.0027 mm2. Working under a 0.7 V supply and as proven by the measurement results, the resultant OTA when driving an output capacitor of 15 nF attained ~100 dB gain, a GBW of 1.46 MHz, and an SR of 0.47 V/μs, consuming only 24 μA of current and requiring no compensation capacitor.
Keywords
CMOS analogue integrated circuits; capacitors; cascade networks; hybrid integrated circuits; operational amplifiers; CMOS technology; GBW product; capacitance 15 nF; cascade structure; current 24 muA; frequency 1.46 MHz; gain-bandwidth product; hybrid OTA; operational transconductance amplifier; output capacitor; signal-current enhancers; size 0.0027 mm; size 0.13 mum; slew rate; voltage 0.7 V; voltage gain; Gain; Logic gates; Manganese; Mirrors; Noise; Standards; Transconductance; Amplifier; frequency response; large capacitive loads; signal-current enhancement; transient response;
fLanguage
English
Journal_Title
Solid-State Circuits, IEEE Journal of
Publisher
ieee
ISSN
0018-9200
Type
jour
DOI
10.1109/JSSC.2015.2477944
Filename
7289395
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