A novel BJT output stage for SAW drivers

Author

Stadius, Kari ; Järviö, Petri ; Halonen, Kari

Author_Institution

Electron. Circuit Design Lab., Helsinki Univ. of Technol., Espoo, Finland

Volume

1

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

329

Abstract

A receiver chain followed by a SAW filter suffers from a high current consumption in the last stage used for driving the filter. In this paper a new feedback scheme for improving the efficiency of a SAW driver is proposed. The required DC current in small-signal conditions is reduced with a factor of two and, at the same time, linearity is significantly improved. In addition, three 30-dB gain IF-amplifiers are described. The circuits are simulated with device models from a 0.9 μm SiGe HBT process

Keywords

Ge-Si alloys; circuit feedback; driver circuits; heterojunction bipolar transistors; intermediate-frequency amplifiers; semiconductor materials; surface acoustic wave filters; 0.9 micron; 30 dB; BJT output stage; IF amplifier; SAW driver; SAW filter; SiGe; SiGe HBT process; circuit feedback; efficiency; linearity; receiver chain; small-signal DC current; Circuit simulation; Driver circuits; Feedback; Germanium silicon alloys; Impedance; Linearity; SAW filters; Silicon germanium; Surface acoustic waves; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems, 2001. ICECS 2001. The 8th IEEE International Conference on

Print_ISBN

0-7803-7057-0

Type

conf

DOI

10.1109/ICECS.2001.957746

Filename

957746