Second order MASH ▵ΣFDM-solution with adaptive improvements

Author

Finsrud, Monica ; Høvin, Mats ; Lande, Tor Sverre

Author_Institution

Dept. of Inf., Oslo Univ., Norway

Volume

1

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

23

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems, 2001. ICECS 2001. The 8th IEEE International Conference on

Print_ISBN

0-7803-7057-0

Type

conf

DOI

10.1109/ICECS.2001.957652

Filename

957652