Loading...
Behavioral modeling of clock feed-through and channel charge injection non-ideal effects in SIMULINK for switched-capacitor integrator
Torkzadeh, P ; Sharif University of Technology | 2010
717
Viewed
- Type of Document: Article
- DOI: 10.1016/j.simpat.2009.11.006
- Publisher: 2010
- Abstract:
- Sigma-Delta modulator ADCs used in signal processing applications usually, are implemented by switched-capacitor (SC) circuits and CMOS transmission gates due to its simplicity for implementation. Channel charge injection (CCI) and clock feed-through (CFT) are two major non-ideal effects existing in TG switches and SC integrators reducing modulator total SNR, its linearity and its total gain. This paper presents a precise model for SC integrator including CCI and CFT non-ideal effects in MATLAB SIMULINK environment which allows designers to perform time-domain behavioral simulations of switched-capacitor (SC) Sigma-Delta modulators. Evaluation and validation of extracted models were performed via behavioral and transistor-level simulations for modeled SC integrator, second and third order modulators using SIMULINK and Agilent ADS environments with a generic 0.18 μm CMOS technology. Non-idealities and nonlinearities effects are apparently observed by comparing the ideal modulator in behavioral analysis and actual modulator in circuit-level environment
- Keywords:
- Channel charge injection ; Clock feed-through ; Channel charge ; Clock feed ; SIMULINK environment ; Switched capacitor integrator ; Transmission gate ; Z-domain ; Capacitance ; Capacitors ; Charge injection ; Clocks ; CMOS integrated circuits ; Cochannel interference ; Delta sigma modulation ; MATLAB ; Modulation ; Signal processing ; Switching circuits ; Modulators
- Source: Simulation Modelling Practice and Theory ; Volume 18, Issue 5 , May , 2010 , Pages 483-499 ; 1569190X (ISSN)
- URL: http://www.sciencedirect.com/science/article/pii/S1569190X09001737