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Multi-stage CMOS amplifier frequency compensation using a single MOSCAP

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Abstract

A multi-stage amplifier is a frequency compensated via a single and small MOSFET based capacitor. The idea reduces die occupation considerably since removes any passive elements in the compensation network. Also, a normal differential pair and a MOSFET based capacitor form compensation network and boost DC gain simultaneously. The proposed approach is symbolically described via MATLAB and numerically simulated via HSPICE circuit simulator using standard TSMC 0.18µ CMOS technology. According to mathematical justifications and simulation results, the proposed amplifier shows operation excellency especially in terms of die occupation and frequency response parameters which make it appropriate choice to realize larger analog and mixed mode systems like modulators and data converters.

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Authors and Affiliations

  1. Department of Electrical Engineering, Garmsar Branch, Islamic Azad University, Garmsar, Iran

    Behnam Babazadeh Daryan, Hassan Khalesi & Alireza Izadbakhsh

  2. Department of Electrical Engineering, Semnan Branch, Islamic Azad University, Semnan, Iran

    Vahid Ghods

Authors
  1. Behnam Babazadeh Daryan
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  2. Hassan Khalesi
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  3. Vahid Ghods
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  4. Alireza Izadbakhsh
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Correspondence to Hassan Khalesi.

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Babazadeh Daryan, B., Khalesi, H., Ghods, V. et al. Multi-stage CMOS amplifier frequency compensation using a single MOSCAP. Analog Integr Circ Sig Process 103, 237–246 (2020). https://doi.org/10.1007/s10470-020-01595-z

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  • DOI: https://doi.org/10.1007/s10470-020-01595-z

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