A 0.8-V 230-µW 98-dB DR Inverter-Based ΣΔ Modulator for Audio Applications

  title={A 0.8-V 230-µW 98-dB DR Inverter-Based ΣΔ Modulator for Audio Applications},
  author={Hao Luo and Yan Han and Ray C. C. Cheung and Xiaopeng Liu and Tianlin Cao},
  journal={J. Solid-State Circuits},
This paper presents a modulator based on a gain-boost class-C inverter for audio applications. The gain-boost class-C inverter behaves as a low-voltage subthreshold amplifier and boosts its dc gain for the high-precision requirement. Meanwhile, an on-chip body bias is used to compensate the performance degradation of the inverter at a slow process corner or low supply voltage. The proposed inverter-based modulator is fabricated in a 65-nmmixed-signal CMOSprocess with a die area of 0.3mm . The… CONTINUE READING
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