A Σ-Δ frequency discriminator based synthesizer

Author

Bax, Walt T. ; Riley, Tom A D ; Plett, Calvin ; Copeland, Miles A.

Author_Institution

Dept. of Electron., Carleton Univ., Ottawa, Ont., Canada

Volume

1

fYear

1995

fDate

30 Apr-3 May 1995

Firstpage

1

Abstract

A new architecture is proposed for a synthesizer suitable for mobile radio applications. This architecture has several advantages over the fractional-N type architectures currently used. The new synthesizer is based on an oversampled Σ-Δ frequency discriminator in the feedback path which converts the frequency to digital form. This results in a largely digital architecture that eliminates many of the analog noise sources that plague conventional fractional-N synthesizers

Keywords

circuit noise; discriminators; frequency synthesizers; land mobile radio; phase noise; sigma-delta modulation; signal sampling; transient response; Σ-Δ frequency discriminator based synthesizer; analog noise source elimination; decimation filter; digital architecture; digital signal processing; feedback path; frequency synthesizer; mobile radio; oversampled Σ-Δ frequency discriminator; phase noise performance; transient response; Circuits; Digital signal processing; Finite impulse response filter; Frequency conversion; Frequency synthesizers; Noise reduction; Noise shaping; Quantization; Signal resolution; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1995. ISCAS '95., 1995 IEEE International Symposium on

Conference_Location

Seattle, WA

Print_ISBN

0-7803-2570-2

Type

conf

DOI

10.1109/ISCAS.1995.521436

Filename

521436