A Wideband SiGe HBT Gilbert Micromixer With Differential-to-Single CE-CC Output Stage

Author

Syu, Jin-Siang ; Meng, Chinchun ; Wu, Chih-Kai ; Huang, Guo-Wei

Author_Institution

Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu

fYear

2007

fDate

11-14 Dec. 2007

Firstpage

1

Lastpage

4

Abstract

A wideband downconversion mixer is demonstrated using 0.35-mum SiGe heterojunction bipolar transistor (HBT) technology. A micromixer topology is implemented in the RF port while a differential type shunt-shunt feedback amplifier and a differential-to-single CE-CC output buffer are used in the IF stage. The frequency response analysis and systematic measurement approach for a wideband Gilbert mixer are proposed in this paper for each individual stage of local frequency (LO), radio frequency (RF), and intermediate frequency (IF). The differential LO signals are generated by several off-chip 180 degree hybrids to cover more than 8:1 bandwidth. The downconversion Gilbert mixer achieves the conversion gain of 6 dB, IP₁ _dB of -17.5 dBm, and IIP3 of -7 dBm. The power consumption is 37.5 mW at 3.3 V supply voltage.

Keywords

frequency response; heterojunction bipolar transistors; mixers (circuits); conversion gain; downconversion Gilbert mixer; frequency response analysis; gain 6 dB; heterojunction bipolar transistor; micromixer topology; power 37.5 mW; shunt-shunt feedback amplifier; size 0.35 mum; voltage 3.3 V; wideband Gilbert mixer; wideband HBT Gilbert micromixer; wideband downconversion mixer; Feedback amplifiers; Frequency measurement; Frequency response; Germanium silicon alloys; Heterojunction bipolar transistors; Mixers; Radio frequency; Silicon germanium; Topology; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2007. APMC 2007. Asia-Pacific

Conference_Location

Bangkok

Print_ISBN

978-1-4244-0748-4

Electronic_ISBN

978-1-4244-0749-1

Type

conf

DOI

10.1109/APMC.2007.4554656

Filename

4554656