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Self-biased cross-coupled low-cost fully-differential CMOS operational amplifier

Self-biased cross-coupled low-cost fully-differential CMOS operational amplifier

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A low-cost fully-differential operational amplifier (opamp) using a novel self-biased cascode output stage and cross-coupled input stage is proposed. Fabricated in only an 84×67 µm2 area with TSMC 0.35 µm technology, and loaded with more than 100 pF capacitance, the opamp possesses 60 dB DC gain, 3 V/µs slew rate, 7.8 MHz unity-gain bandwidth, and −48 dB total harmonic distortion.

Inspec keywords: operational amplifiers; harmonic distortion; CMOS integrated circuits

Other keywords: cross-coupled operational amplifier; low-cost operational amplifier; TSMC technology; self-biased cascode output stage; self-biased operational amplifier; 60 dB; 100 pF; 0.35 micron; CMOS operational amplifier; 738 MHz; fully-differential operational amplifier; cross-coupled input stage; unity-gain bandwidth; harmonic distortion

Subjects: Amplifiers; CMOS integrated circuits

References

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    3. 3)
      • P.R. Gray , R.G. Meyer . (1993) Analysis and design of analog integrated circuits.
    4. 4)
      • F. Maloberti . (2001) Analysis design for CMOS VLSI systems.
    5. 5)
    6. 6)
      • B. Razavi . (2002) Design of analog CMOS integrated circuits.
    7. 7)
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