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Dynamic range extension technique for high-order ΣΔ ADCs by digital level control

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4 Author(s)
Dong-Yun Lee ; Sch. of Electron. Eng., Seoul Nat. Univ., South Korea ; Min-Kyu Kim ; Dae-Yun Shim ; Kim, Wonchan

A new architecture is presented for a high-order multi-bit ΣΔ ADC which does not require a precision multi-bit DAC in the feedback loop. Local digital level control is employed to extend integrator output dynamic range. A prototype fourth-order modulator is simulated with circuit non-idealities, showing an SNR of ~110 dB

Published in:

Electronics Letters  (Volume:33 ,  Issue: 25 )

Date of Publication:

4 Dec 1997

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