DocumentCode
3541049
Title
High current CMOS operational amplifier
Author
Loikkanen, Mikko ; Kostamovaara, Juha
Author_Institution
Dept. of Electr. & Inf. Eng., Oulu Univ., Finland
fYear
2005
fDate
23-26 May 2005
Firstpage
216
Abstract
This paper describes a low voltage CMOS operational amplifier, which is capable of driving heavy resistive and capacitive loads. Robust and power efficient compensation is achieved by using Miller compensation together with a high bandwidth stage. Measurements show that the amplifier achieves 5.7 MHz unity gain frequency and 61° phase margin when driving 1nF||1kΩ load, while drawing 2.4mA from 1.5V supply. At 3.0V supply the amplifier is able to source or sink more than 100 mA into 1nF||10Ω load.
Keywords
CMOS integrated circuits; low-power electronics; microwave amplifiers; operational amplifiers; 1 kohm; 1 nF; 1.5 V; 10 ohm; 2.4 mA; 3 V; 5.7 MHz; CMOS operational amplifier; Miller compensation; capacitive loads; heavy resistive loads; high current operational amplifier; low voltage operational amplifier; power efficient compensation; robust compensation; Bandwidth; Capacitance; Frequency measurement; High power amplifiers; Impedance; Operational amplifiers; Power measurement; Robustness; Transconductance; Voltage;
fLanguage
English
Publisher
ieee
Conference_Titel
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN
0-7803-8834-8
Type
conf
DOI
10.1109/ISCAS.2005.1464563
Filename
1464563
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