Errors of mismatch and currents calibration caused by channel geometrical variety in switchedcurrent are investigated in this paper. The relation and computing of mismatch and sensitivity are discussed also, and then ...Errors of mismatch and currents calibration caused by channel geometrical variety in switchedcurrent are investigated in this paper. The relation and computing of mismatch and sensitivity are discussed also, and then a measure method of switched current mismatch using wavelet decomposition is proposed. A selected group of same transconductance is choosing as a cohort firstly, and the sensitivities of cohort in relation to the variation of transconductance are computed. Compared with the nominal deviation and tolerance borderline, the optimization and testing can be performed. As an example, a sixth order chebyshev low-pass filter is simulated and tested. The results have justified the reliability and feasibility of the method.展开更多
基金the National Natural Science Foundation of China (No. 50677014)Specialized Research Fund for the Doctoral Program of Higher Education of MOE (No.20060532002)+2 种基金the Program for New Century Excellent Talents in University (No.NCET-04-0767)the Science and Technology foundation of Hunan Province (Nos. obJJ2024 and 05GK 2005)the key Technologies Research and Development Program of the Eleventh Five Year Plan of China.
文摘Errors of mismatch and currents calibration caused by channel geometrical variety in switchedcurrent are investigated in this paper. The relation and computing of mismatch and sensitivity are discussed also, and then a measure method of switched current mismatch using wavelet decomposition is proposed. A selected group of same transconductance is choosing as a cohort firstly, and the sensitivities of cohort in relation to the variation of transconductance are computed. Compared with the nominal deviation and tolerance borderline, the optimization and testing can be performed. As an example, a sixth order chebyshev low-pass filter is simulated and tested. The results have justified the reliability and feasibility of the method.
