Highly linear down-conversion mixer in 65nm CMOS for a high supply voltage of 2.5V

Author

Schweiger, Kurt ; Zimmermann, Horst

Author_Institution

Inst. of Electrodynamics, Microwave & Circuit Eng., Vienna Univ. of Technol., Vienna, Austria

fYear

2010

fDate

14-16 April 2010

Firstpage

205

Lastpage

208

Abstract

A direct down conversion Gilbert-type mixer in combination with an active low-pass filter for 4MHz is presented. The Gilbert-type mixer is enhanced with a source degeneration to improve the linearity performance. The active filter is a linearity enhanced differential amplifier with feedback network. For the high supply voltage of 2.5V additional over-voltage protection with cascodes is added to the circuit parts. The entire receiver part consumes 6.88mA from a 2.5V supply. A high gain of 26.6dB is achieved by the active mixer in combination with the active filter. The noise figure of the entire circuit is only 11.8dB. The input referred intercept point of 3^rd-order is +18.6dBm.

Keywords

active filters; differential amplifiers; low-pass filters; mixers (circuits); CMOS; active low pass filter; cascodes; current 6.88 mA; differential amplifier; direct down conversion Gilbert-type mixer; feedback network; frequency 4 MHz; gain 26.6 dB; high supply voltage; linear down-conversion mixer; linearity performance; noise figure 11.8 dB; over-voltage protection; size 65 nm; source degeneration; voltage 2.5 V; Active filters; Baseband; CMOS technology; Circuit noise; Digital video broadcasting; Frequency; Linearity; Low pass filters; Receivers; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

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

Conference_Location

Vienna

Print_ISBN

978-1-4244-6612-2

Type

conf

DOI

10.1109/DDECS.2010.5491785

Filename

5491785