论文信息 - Low-voltage CMOS operational amplifiers with wide input-output swing based on a novel scheme

Low-voltage CMOS operational amplifiers with wide input-output swing based on a novel scheme

A scheme to achieve low-voltage wide-bandwidth operation of CMOS op amps with rail-to-rail input and output swing and constant gm is presented. It is based on a novel concept that uses a floating voltage controlled voltage source in the feedback path of the op amp in order to keep its input terminals close to one of the supply rails. Postlayout simulations on a 1.2 V rail-to-rail op amp with 13 MHz GB are presented which verify the proposed scheme.

Jaime Ramirez-Angulo | Ramon G. Carvajal | J. N. Tombs | Antonio Torralba

[1] Jaime Ramirez-Angulo,et al. Simple technique for op amp continuous-time 1 V supply operation , 1999 .

[2] R. Castello,et al. A 1 V 1.8 MHz CMOS switched-opamp SC filter with rail-to-rail output swing , 1997, 1997 IEEE International Solids-State Circuits Conference. Digest of Technical Papers.

[3] Vincenzo Peluso,et al. 900 mV differential class AB OTA for switched opamp applications , 1997 .

[4] Edgar Sanchez-Sinencio,et al. Low-voltage class AB buffers with quiescent current control , 1998, IEEE J. Solid State Circuits.

[5] Andrea Baschirotto,et al. Active series switch for switched-opamp circuits , 1998 .

[6] Gabriel A. Rincon-Mora,et al. Designing 1-V op amps using standard digital CMOS technology , 1998 .