Title :
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
fDate :
30 Apr-3 May 1995
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;
Conference_Titel :
Circuits and Systems, 1995. ISCAS '95., 1995 IEEE International Symposium on
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2570-2
DOI :
10.1109/ISCAS.1995.521436
