A 75 μW rail-to-rail class AB CMOS operational amplifier

✍ Scribed by Carlo Fiocchi; Umberto Gatti

• Book ID: 104157990
• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 456 KB
• Volume: 29
• Category: Article
• ISSN: 0026-2692
• DOI: 10.1016/s0026-2692(98)00076-7

✦ Synopsis

A new class AB CMOS operational amplifier featuring rail-to-rail output swing is presented. The proposed circuit operates with an output voltage supply of 1 V only, while the overall power consumption is lower than 75/~W. The output stage shows a quiescent current of 15/zA, while it guarantees a peak current of 220/~A. The slew rate is 1.5 V/zs-I (CI = 150 pF) and the THD is -63 dB, when a 0.98 Vpp-10.4 kHz sinewave is applied, as measured on an experimental prototype realised with a standard 0.8 #m CMOS process. The circuit presented is suitable for use in portable hand-set systems or in medical aids.