Dual quantization continuous time ΣΔ modulators with spectrally shaped feedback

Author

Pakniat, Hossein ; Yavari, Mohammad

Author_Institution

Dept. of Electr. Eng., Amirkabir Univ. of Technol., Tehran, Iran

fYear

2011

fDate

11-14 Dec. 2011

Firstpage

414

Lastpage

417

Abstract

A new technique is proposed to eliminate the nonlinear error of a multibit digital-to-analog converter (DAC) used in a sigma-delta modulator where the solidity of multibit DAC against the clock jitter is reserved. By using dual quantization, this technique reduces the bit length of DAC to one bit and consequently eliminates its nonlinear error. A low-pass finite impulse response (FIR) filter with pseudo digital implementation is merged with this 1-bit DAC to improve its solidity against the clock jitter up to the conventional multibit DACs.

Keywords

low-pass filters; sigma-delta modulation; 1-bit DAC; DAC bit length; clock jitter; dual quantization; dual quantization continuous time ΣΔ modulator; low-pass finite impulse response filter; multibit digital-to-analog converter; nonlinear error; pseudo digital implementation; sigma-delta modulator; spectrally shaped feedback; Clocks; Finite impulse response filter; Jitter; Modulation; Quantization; Sensitivity; Sigma delta modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems (ICECS), 2011 18th IEEE International Conference on

Conference_Location

Beirut

Print_ISBN

978-1-4577-1845-8

Electronic_ISBN

978-1-4577-1844-1

Type

conf

DOI

10.1109/ICECS.2011.6122301

Filename

6122301