论文信息 - A 22 kHz multi-bit switched-capacitor /spl Delta//spl Sigma/ D/A converter with 92 dB dynamic range

A 22 kHz multi-bit switched-capacitor /spl Delta//spl Sigma/ D/A converter with 92 dB dynamic range

This paper presents a 22 kHz, multi-bit D/A converter using a 5-level switched-capacitor (SC) DAC to provide 92 dB dynamic range and better than -94 dB THD. A 4th-order modulator is used with an oversampling ratio of 32. The multi-level SC DAC uses time- and capacitor-multiplexed methods that yield high linearity with a modest opamp gain in the presence of capacitor mismatches. The 5-level DAC is implemented in a double-poly, 2 /spl mu/m, /spl plusmn/5 V CMOS process from MOSIS without any trimming or calibration.

K. Suyama | P. Ju | P. Ferguson | Wai Lee

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