A mixer-filter combination of a direct conversion receiver for DVB-H applications in 65nm CMOS

Author

Heimo Uhrmann;Lukas D?rrer;Franz Kuttner;Kurt Schweiger;Horst Zimmermann

Author_Institution

Institute of Electrodynamics, Microwave and Circuit Engineering, Vienna University of Technology, Gusshausstra?e 25/354, Austria, 1040 Vienna

fYear

2010

fDate

4/1/2010 12:00:00 AM

Firstpage

209

Lastpage

212

Abstract

A mixer and operational amplifier filter combination in 65 nm CMOS technology for DVB-H is presented. Special focus is laid on the design of the operational amplifier, which is a nested-Miller compensated, 3-stage feed-forward operational amplifier. Characteristic of the operational amplifier is the supply voltage of 2.5 V to enlarge the output signal swing of the operational amplifier. Cascodes are used avoiding the electrical destruction. The operational amplifier has a gain of 89 dB, a gain-bandwidth of 1.1 GHz, and phase margin of 53.3 deg at a load of 1 pF on each of the two differential outputs. The current consumption is 5.85 mA. This operational amplifier is used in a first-order low-pass filter after a passive mixer. This mixer-filter combination is characterized as well. A conversion gain of 24 dB and a bandwidth of 4 MHz are realized. Furthermore a noise figure of 16.1 dB and an IIP3 of +10dBm are achieved.

Keywords

"Digital video broadcasting","Operational amplifiers","CMOS technology","Gain","Feedforward systems","Voltage","Differential amplifiers","Band pass filters","Low pass filters","Passive filters"

Publisher

ieee

Conference_Titel

Design and Diagnostics of Electronic Circuits and Systems (DDECS), 2010 IEEE 13th International Symposium on

Print_ISBN

978-1-4244-6612-2

Type

conf

DOI

10.1109/DDECS.2010.5491782

Filename

5491782