Straightforward transient and noise analysis for /spl Sigma//spl Delta/ PLL-based synthesizers of multiple feedback and feedforward structures

Author

Tsang, K.S.H. ; Ng, T.S.

Author_Institution

Dept. of Electr. & Electron. Eng., Univ. of Hong Kong, China

Volume

1

fYear

2003

Abstract

This paper presents a noise analysis model, which allows basic phase noise calculations of a /spl Sigma//spl Delta/ PLL fractional-N synthesizer. Calculation results on various /spl Sigma//spl Delta/ orders of multiple architectures, feedback and feedforward, and on transient processes, which provides quick visualization of the design methods used to minimize the required settling-time, are presented.

Keywords

circuit feedback; circuit noise; feedforward; frequency synthesizers; network analysis; phase locked loops; phase noise; sigma-delta modulation; transfer functions; transient analysis; /spl Sigma//spl Delta/ PLL-based synthesizers; feedback architectures; feedforward architectures; fractional-N synthesizer; noise analysis model; phase noise; settling time; sigma-delta PLL; transient process; Feedback; Frequency conversion; Frequency synthesizers; Phase frequency detector; Phase locked loops; Phase modulation; Phase noise; Quantization; Transient analysis; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2003 IEEE MTT-S International

Conference_Location

Philadelphia, PA, USA

ISSN

0149-645X

Print_ISBN

0-7803-7695-1

Type

conf

DOI

10.1109/MWSYM.2003.1211033

Filename

1211033