A 40~900MHz Broadband CMOS Differential LNA with Gain-Control for DTV RF Tuner

Author

Huang, D.-R. ; Chuang, H.-R. ; Chu, Y.-K.

Author_Institution

Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan

fYear

2005

fDate

1-3 Nov. 2005

Firstpage

465

Lastpage

468

Abstract

This paper presents a 40-900 MHz broadband CMOS differential LNA with gain control for DTV RF tuner application. The LNA is fabricated in a TSMC 0.18-mum CMOS process. The broadband differential LNA uses dual-feedback and shunt-shunt feedback topologies to achieve high and flat broadband response. The LNA is designed with 75 Omega/75 Omega differential input/output impedance for 75-Omega TV system application. The circuit measurement is performed using an FR-4 PCB test fixture. In the frequency range of 40~900MHz, the LNA exhibits a gain of 20.26 plusmn 0.41 dB, noise figure less than 5dB, and input P_1dB between -19.5 ~ plusmn;20.3 dBm. The gain tuning range is from 20 to -42.8 ~ 5 dB over 40-900 MHz range. The power consumption is 43 mW at VDD = 1 8 V

Keywords

CMOS integrated circuits; circuit feedback; differential amplifiers; digital television; low noise amplifiers; printed circuit testing; tuning; wideband amplifiers; 0.18 micron; 1.8 V; 40 to 900 MHz; 43 mW; 75 ohm; CMOS process; DTV RF tuner; FR-4 PCB test fixture; TSMC; broadband CMOS LNA; differential LNA; dual-feedback; gain tuning range; gain-control; low noise amplifier; power consumption; shunt-shunt feedback topologies; CMOS process; Circuit testing; Circuit topology; Digital TV; Feedback; Gain control; Impedance; Performance evaluation; Radio frequency; Tuners;

fLanguage

English

Publisher

ieee

Conference_Titel

Asian Solid-State Circuits Conference, 2005

Conference_Location

Hsinchu

Print_ISBN

0-7803-9162-4

Electronic_ISBN

0-7803-9163-2

Type

conf

DOI

10.1109/ASSCC.2005.251766

Filename

4017632