Title :
Improved Delta Sigma Modulators for high speed applications
Author :
Gautier, David ; Robbe, Michel ; Doucet, Stephan ; Lemoine, Renaud ; Bachir, Smail ; Duvanaud, Claude
Author_Institution :
ACCO Semicond., Louveciennes, France
Abstract :
This article presents a new Low-Pass Delta Sigma Modulators (LPDS) architecture to improve the noise shaping for high frequency applications. The errors resulting from approximations made by calculating with 1/2N coefficients are compensated. Simulations with extracted parasitics of the layout are made and give a SNDR of 111 dB, 3.8 mW power consumption at 4 GHz in 65 nm CMOS technology for UMTS standard.
Keywords :
CMOS integrated circuits; delta-sigma modulation; high-speed integrated circuits; 1/2N coefficients; CMOS technology; UMTS standard; frequency 4 GHz; high-speed application; layout extracted parasitics; low-pass delta sigma modulator architecture; noise figure 111 dB; noise shaping; power 3.8 mW; size 65 nm; CMOS technology; Capacitors; Delta-sigma modulation; Energy consumption; Feedback; Finite wordlength effects; Frequency; Noise shaping; Signal to noise ratio; Transfer functions;
Conference_Titel :
Circuits and Systems, 2009. MWSCAS '09. 52nd IEEE International Midwest Symposium on
Conference_Location :
Cancun
Print_ISBN :
978-1-4244-4479-3
Electronic_ISBN :
1548-3746
DOI :
10.1109/MWSCAS.2009.5236075
