Title :
Dual bias feed SiGe HBT low noise linear amplifier
Author :
Taniguchi, E. ; Maeda, K. ; Ikushima, T. ; Sadahiro, K. ; Itoh, K. ; Suematsu, N. ; Takagi, T.
Author_Institution :
Inf. Technol. R&D Center, Mitsubishi Electr. Corp., Kanagawa, Japan
Abstract :
A 2 GHz-band SiGe HBT low noise amplifier (LNA) achieving high saturation power and low distortion performance is described. It has a novel diode/resistor dual bias feed circuit for the base of the HBT to extend its P1 dB. In the small signal region, the conventional resistor feed circuit is a dominant base current source, but the in large signal region, the diode turns on and the diode feed circuit can supply base current like a voltage source which allows higher output power and linearity. The fabricated dual feed type LNA shows the P1 dB improvement of 5 dB compared with the conventional resistor feed LNA.
Keywords :
Ge-Si alloys; MMIC amplifiers; UHF amplifiers; UHF integrated circuits; bipolar MMIC; bipolar analogue integrated circuits; heterojunction bipolar transistors; integrated circuit noise; semiconductor materials; 2 GHz; SiGe; SiGe HBT LNA; diode/resistor dual bias feed circuit; dual bias feed HBT LNA; high saturation power; low distortion performance; low noise linear amplifier; Circuit noise; Current supplies; Diodes; Feeds; Germanium silicon alloys; Heterojunction bipolar transistors; High power amplifiers; Low-noise amplifiers; Resistors; Silicon germanium;
Conference_Titel :
Microwave Symposium Digest, 2001 IEEE MTT-S International
Conference_Location :
Phoenix, AZ, USA
Print_ISBN :
0-7803-6538-0
DOI :
10.1109/MWSYM.2001.966889
