Title :
Dynamic tuning of the noise transfer function of high order delta-sigma analog to digital converters
Author :
Fifield, Antoine D. ; Allee, D.K.
Abstract :
This paper presents a dynamically tuned 3rd order ΔΣ modulator to ensure stability and enhance input range. Dynamic tuning is achieved by tuning of the noise transfer function (NTF) through the movement of poles via independently varying the feedback DAC voltages. This method is shown to increase the input signal range by up to 28% over conventional design methods.
Keywords :
analogue-digital conversion; circuit feedback; circuit tuning; delta-sigma modulation; integrated circuit noise; dynamic tuning; feedback DAC voltages; high order delta-sigma analog to digital converters; input range; input signal range; noise transfer function; Analog-digital conversion; Delta modulation; Digital modulation; Dynamic range; Equations; Feedback; Frequency; Noise shaping; Stability; Transfer functions;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1010774
