Title :
A Novel Chip Design of Chopper-Stabilized Rail-to-Rail Operational Amplifier
Author :
Xu Yong ; Zhao Fei ; Xu Yongbin ; Guan Yu
Author_Institution :
Coll. of Sci., PLA Univ. of Sci. & Technol., Nanjing, China
Abstract :
A novel chip design of chopper-stabilized operational amplifier is presented, chopper-wave modulation and demodulation is used in the architecture, and its lj noise is reduced remarkably. To extend common mode input voltage range, a novel rail-to-rail differential amplifier is adopted in the input-stage. The range of common mode input voltage is from zero to power supply voltage, and it consumes about 22 muA quiescent current. When sine wave input signal frequency is 1 kHz and output power is 0.5 W, the THD of output signal is only 0.05%.
Keywords :
operational amplifiers; chip design; chopper-stabilized rail-to-rail operational amplifier; chopper-wave demodulation; chopper-wave modulation; current 22 muA; frequency 1 kHz; power 0.5 W; Chip scale packaging; Demodulation; Differential amplifiers; Noise reduction; Operational amplifiers; Power supplies; Rail to rail amplifiers; Rail to rail inputs; Rail to rail operation; Voltage;
Conference_Titel :
Image and Signal Processing, 2009. CISP '09. 2nd International Congress on
Conference_Location :
Tianjin
Print_ISBN :
978-1-4244-4129-7
Electronic_ISBN :
978-1-4244-4131-0
DOI :
10.1109/CISP.2009.5305774
