An Intuitive Current-Driven Passive Mixer Model Based on Switched-Capacitor Theory

Author

Sosio, M. ; Liscidini, Antonio ; Castello, Rinaldo

Author_Institution

Univ. degli Studi di Pavia, Pavia, Italy

Volume

60

Issue

2

fYear

2013

fDate

Feb. 2013

Firstpage

66

Lastpage

70

Abstract

An intuitive current-driven passive mixer model is presented. Without using complex math, it provides a signal-transfer-function/noise description of a passive mixer when used in a wireless receiver (RX) chain driven by a transconductor and loaded by a low-pass baseband (BB). Exploiting a switched-capacitor approach, the model represents a useful tool for simple hand analysis and design. The case of a 25%-duty-cycle quadrature RX chain based on a transimpedance amplifier at BB is analyzed in detail and compared with simulations, showing good accuracy.

Keywords

mixers (circuits); operational amplifiers; radio receivers; switched capacitor networks; transfer functions; BB; complex math; current-driven passive mixer model; intuitive current-driven passive mixer model; low-pass baseband; signal noise description; signal transfer-function; simple hand analysis; simple hand design; switched-capacitor approach; switched-capacitor theory; transconductor; transimpedance amplifier-based-duty-cycle quadrature RX chain; wireless receiver chain; Analytical models; Impedance; Integrated circuit modeling; Load modeling; Mixers; Noise; Radio frequency; Current-driven passive mixers; down-conversion gain; noise figure; quadrature chain; wireless receivers (RXs);

fLanguage

English

Journal_Title

Circuits and Systems II: Express Briefs, IEEE Transactions on

Publisher

ieee

ISSN

1549-7747

Type

jour

DOI

10.1109/TCSII.2012.2234993

Filename

6476652