Title :
A VCO Based Digital Microphone Utilizing A FIR Sigma Delta Converter
Author :
Soell, S. ; Porr, B.
Author_Institution :
Glasgow Univ.
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;
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
DOI :
10.1109/MIXDES.2006.1706573
