Title :
Spectral shaping of DAC nonlinearity errors through modulation of expected errors
Author :
Andersson, K.O. ; Andersson, Niklas U. ; Wikner, J. Jacob
Author_Institution :
Ericsson Microelectron. AB, Linkoping
Abstract :
Traditionally, delta-sigma modulation has been used for shaping of quantization noise. We present a modified version of delta-sigma modulation which also takes into account unwanted nonlinearities by feeding back not only the quantization error, but also the expected physical error. Behavioral-level simulations of a 5th-order structure showing an improvement of up to 4 effective bits are included
Keywords :
circuit feedback; delta-sigma modulation; digital-analogue conversion; errors; behavioral-level simulation; delta-sigma modulation; digital-analog converter; nonlinearity error feedback; quantization noise; spectral shaping; Circuits; Delta-sigma modulation; Feedback loop; Frequency; Jacobian matrices; Mathematical model; Noise shaping; Nonlinear filters; Quantization; Transfer functions;
Conference_Titel :
Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6685-9
DOI :
10.1109/ISCAS.2001.921336
