Title :
Second order MASH ▵ΣFDM-solution with adaptive improvements
Author :
Finsrud, Monica ; Høvin, Mats ; Lande, Tor Sverre
Author_Institution :
Dept. of Inf., Oslo Univ., Norway
fDate :
6/23/1905 12:00:00 AM
Abstract :
This paper presents a new, adaptive improvement to a novel second order frequency-to-digital cascaded delta sigma modulator. The adaptive corrections significantly reduce the sensitivity to analog imperfections in the MASH-like ▵Σ frequency-to-digital modulator (▵ΣFDM), and makes it possible to implement the circuit in standard digital CMOS without loosing performance. The result is a simple second order delta-sigma modulator with high precision. Simulations of the circuit with errors and corrections are included to confirm the theory
Keywords :
CMOS integrated circuits; adaptive control; analogue-digital conversion; cascade networks; circuit feedback; delta-sigma modulation; error correction; frequency modulation; mixed analogue-digital integrated circuits; modulators; MASH structure; MASH-like ▵Σ modulator; adaptive control; adaptive correction; cascaded delta sigma modulator; digital CMOS; feedback path; high precision; second order frequency-to-digital modulator; Capacitors; Circuit simulation; Clocks; Frequency modulation; Linearity; Multi-stage noise shaping; Noise shaping; Phase noise; Sampling methods; Voltage;
Conference_Titel :
Electronics, Circuits and Systems, 2001. ICECS 2001. The 8th IEEE International Conference on
Print_ISBN :
0-7803-7057-0
DOI :
10.1109/ICECS.2001.957652
