Generalized Linear Periodic Time-Varying Analysis for Noise Reduction in an Active Mixer

Author

Lerdworatawee, Jongrit ; Namgoong, Won

Author_Institution

Silicon Lab., Austin

Volume

42

Issue

6

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

1339

Lastpage

1351

Abstract

A simple linear periodic time-varying circuit model is proposed to rigorously analyze the noise behavior in an active mixer. This analysis can be shown to be a generalization of existing LPTV mixer models, which assume that the mixer is a memoryless device and, as a result, is valid for low frequency only. Based on the proposed LPTV circuit model, explicit formulas for noise figure that accounts for the effect of the thermal noise folding and the flicker noise leakage are derived. Our analysis shows that the mixer operating at OFF overlap mode yields a better noise performance. The analysis is validated against simulations and measurements.

Keywords

active networks; flicker noise; mixers (circuits); thermal noise; time-varying networks; LPTV mixer; active mixer; flicker noise leakage; linear periodic time-varying analysis; memoryless device; noise reduction; thermal noise; 1f noise; Active noise reduction; Analytical models; Circuit noise; Frequency; Low-frequency noise; Noise figure; Noise reduction; Performance analysis; Time varying circuits; CMOS analog integrated circuit; integrated circuit noise; mixer noise; nonlinear circuit; time-varying circuits;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/JSSC.2007.896519

Filename

4214975