A VCO Based Digital Microphone Utilizing A FIR Sigma Delta Converter

Author

Soell, S. ; Porr, B.

Author_Institution

Glasgow Univ.

fYear

2006

fDate

22-24 June 2006

Firstpage

223

Lastpage

227

Abstract

As negative feedback in control systems is often not applicable and/or produces undesirable effects, this paper presents an analysis and simulation of a finite impulse response (FIR) sigma delta A/D converter comprising of a voltage controlled oscillator (VCO) and D-flip-flop to digitize data. The FIR sigma delta modulator (SDM) is analyzed in terms of performance and simulation results are given. As an application example conventional condenser microphones are introduced and then improved upon utilizing the FIR sigma delta modulator. Proof-of-concept is given along with simulation results

Keywords

FIR filters; flip-flops; microphones; sigma-delta modulation; voltage-controlled oscillators; D-flip-flop; FIR sigma delta converter; FIR sigma delta modulator; VCO based digital microphone; analog-to-digital converter; finite impulse response sigma delta converter; voltage controlled oscillator; Analytical models; Control system synthesis; Delta modulation; Delta-sigma modulation; Finite impulse response filter; Microphones; Negative feedback; Performance analysis; Voltage control; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Mixed Design of Integrated Circuits and System, 2006. MIXDES 2006. Proceedings of the International Conference

Conference_Location

Gdynia

Print_ISBN

83-922632-2-7

Type

conf

DOI

10.1109/MIXDES.2006.1706573

Filename

1706573