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Rail-to-rail input-stage with linearly tunable transconductance

Rail-to-rail input-stage with linearly tunable transconductance

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© The Institution of Engineering and Technology
Published

A new technique for the rail-to-rail input stage is proposed. The proposed technique is based on the master-slave approach of complementary MOS transistor pairs. The input transconductance is linearly tunable over a large range and is almost constant for the rail-to-rail common-mode range. The effectiveness of the proposed technique was verified by simulations using a standard 0.18 µm CMOS process.

Inspec keywords: CMOS integrated circuits; MOSFET

Other keywords: complementary MOS transistor pair; master-slave approach; size 0.18 micron; tunable transconductance; rail-to-rail input-stage

Subjects: Insulated gate field effect transistors; CMOS integrated circuits

References

    1. 1)
      • J. Ramirez-Angulo , S. Balasubramanian , A.J. Lopez-Martin , R.G. Carvajal . Low voltage differential input stage with improved CMRR and true rail-rail common mode input range. IEEE Trans. Circuits Syst. II, Express Briefs , 12 , 1229 - 1233
    2. 2)
      • Yan, S., Hu, J., Song, T., Sanchez-Sinencio, E.: `A constant-g', Proc. ISCAS, 2005, Kobe, Japan, p. 2567–2570.
    3. 3)
      • M.M. Ahmadi . An adaptive biased single-stage CMOS operational amplifier with novel rail-to-rail constant-gm input stage. Analog Integr. Circuits Signal Process. , 10 , 71 - 78
    4. 4)
      • J.E. Duque-Carrillo , J.M. Carrillo , J.L. Ausin , G. Torelli . Input/output rail-to-rail CMOS operational amplifier with shaped common-mode response. Analog Integr. Circuits Signal Process. , 3 , 221 - 232
    5. 5)
    6. 6)
      • Raut, R.: `Stabilizing the transconductance in CMOS transconductors for application in gm-C filters', Proc. ISCAS, 2001, Sydney, Australia, p. 556 – 559.
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