[1] Chang Changyuan, Li Xian, Yao Jiannan, Li Juan, et al. Rail-to-rail op-amp with constant transconductance, SR and gain [J]. Journal of Southeast University (English Edition), 2008, 24 (2): 163-167. [doi:10.3969/j.issn.1003-7985.2008.02.008]

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Rail-to-rail op-amp with constant transconductance, SR and gain()

一种恒定跨导、摆率和增益的轨至轨运放

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

24

Issue:

2008 2

Page:

163-167

Research Field:

Circuit and System

Publishing date:

2008-06-03

Info

Title:

Rail-to-rail op-amp with constant transconductance, SR and gain

一种恒定跨导、摆率和增益的轨至轨运放

Author(s):

Chang Changyuan¹;  Li Xian²;  Yao Jiannan¹;  Li Juan²

¹College of Integrated Circuits, Southeast University, Nanjing 210096, China
²School of Electronic Science and Engineering, Southeast University, Nanjing 210096, China

常昌远¹;  李弦²;  姚建楠¹;  李娟²

¹东南大学集成电路学院, 南京 210096; ²东南大学电子科学与工程学院, 南京 210096

Keywords:

CMOS analog circuit;  op-amp;  rail-to-rail;  constant transconductance;  constant slew rate;  constant gain

CMOS模拟电路;  放大器;  轨至轨;  恒定跨导;  恒定摆率;  恒定增益

PACS:

TN492

DOI:

10.3969/j.issn.1003-7985.2008.02.008

Abstract:

A novel general-purpose low-voltage rail-to-rail CMOS(complementary metal-oxide-semiconductor transistor)operational amplifier(op-amp)is introduced, which obtains constant transconductance, slew rate and constant high gain over the entire input common mode voltage range.The proposed scheme has the potential for applications in deep submicrometer technology, as the operation of the circuit does not exclusively rely on the square-law or the linear-law of transistors.The scheme is compact and suitable for applications as VLSI cell.The rail-to-rail op-amp has been implemented in DPDM 0.6 μm mixed-signal process.The simulations show that in the entire range of input common mode voltage, the variations in transconductance, SR and gain are 1%, 2.3%, 1.36 dB, respectively.Based on this, the layout and tape-out are carried out.The area of layout is 0.072 mm².The test results are basically consistent with the circuit simulation.

提出了一种新型的通用低压轨至轨CMOS运放.该运放在整个输入共模电压范围内获得了恒定的跨导、摆率和恒定的高增益.所提出的电路有应用于深亚微米工艺的潜力, 因为运放电路的运行不依赖于晶体管平方率或线性率的约束.因此该电路比较紧凑, 适用于VLSI单元的应用.轨至轨CMOS运放采用DPDM CMOS混合信号工艺设计, 模拟结果表明在整个输入共模电压范围内, 跨导、摆率和增益的波动分别为1%, 2.3%和 1.36 dB.在此基础上进行了版图设计和流片测试, 版图面积为0.072 mm², 实际测试结果与模拟结果基本一致.

References:

[1] Redman-White W.A high bandwidth constant g_m and slew-rate rail-to-rail CMOS input circuit and its application to analog cells for low voltage VLSI systems [J]. IEEE Journal of Solid-State Circuits, 1997, 32(5):701-712.
[2] Carrillo Juan M, Duque-Carrillo J Francisco, Toreli Guido, et al.Constant-g_m constant-slew-rate high-bandwidth low-voltage rail-to-rail CMOS input stage for VLSI cell libraries [J].IEEE Journal of Solid-State Circuits, 2003, 38(8):1364-1372.
[3] Fiez Terri S, Yang Howard C, Yang John J, et al.A family of high-swing CMOS operational amplifiers [J].IEEE Journal of Solid-State Circuits, 1989, 24(6):1683-1687.
[4] Hogervorst Ron, Tero John P, Eschauzier Ruud G H, et al.A compact power-efficient 3 V CMOS rail-to-rail input/output operational amplifier for VLSI cell libraries [C]//Proceedings of the 1994 IEEE International Solid-State Circuits Conference.San Francisco, CA, USA, 1994:244-245.
[5] Wang M, Mayhugn T L Jr, Embabi Sh H K, et al.Constant-g_m rail-to-rail CMOS op-amp input stage with overlapped transition regions [J].IEEE Journal of Solid-State Circuits, 1999, 34(2):148-156.
[6] Sakurai S, Ismai M.Robust design of rail-to-rail CMOS operational amplifier for a low power supply voltage [J].IEEE Journal of Solid-State Circuits, 1996, 31(2):146-156.
[7] Yan Shouli, Hu Jingyu, Song Tongyu, et al.A constant-g_m rail-to-rail op-amp input stage using dynamic current scaling technique [C]//IEEE Proceedings of the ISCAS. 2005, 3:2563-2566.
[8] Song Tongyu, Hu Jingyu, Li Xiaohong, et al.A constant-g_m constant-slew-rate rail-to-rail input stage with static feedback and dynamic current steering for VLSI cell libraries [J].IEEE Transactions on Circuits and Systems Ⅱ:Express Briefs, 2007, 54(1):76-80.

Memo

Memo:

Biography: Chang Changyuan(1961—), male, doctor, associate professor, ccyycc@seu.edu.cn.
Citation: Chang Changyuan, Li Xian, Yao Jiannan, Li Juan.Rail-to-rail op-amp with constant transconductance, SR and gain[J].Journal of Southeast University(English Edition), 2008, 24(2):163-167.

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