An Accurate Expression for the Noise Figure of Bipolar Transistors Including Crowding Effect

1978 ◽  
pp. 26-29
Author(s):  
J. Caminade ◽  
G. Gac ◽  
G. Blasquez
Keyword(s):  
Noise Figure ◽  
Bipolar Transistors ◽  
Crowding Effect ◽  
Accurate Expression

A more accurate expression for the noise figure of transistors

1976 ◽  
Vol 19 (2) ◽  
pp. 149-151 ◽  
Author(s):  
A. van der Ziel ◽  
J.A. Cruz-Emeric ◽  
R.D. Livingstone ◽  
J.C. Malpass ◽  
D.A. McNamara
Keyword(s):  
Noise Figure ◽  
Accurate Expression

scholarly journals Noise Parameter Analysis of SiGe HBTs for Different Sizes in the Breakdown Region

2016 ◽  
Vol 2016 ◽  
pp. 1-5
Author(s):  
Chie-In Lee ◽  
Yan-Ting Lin ◽  
Wei-Cheng Lin
Keyword(s):  
Heterojunction Bipolar Transistors ◽  
Silicon Germanium ◽  
Noise Figure ◽  
Rf Circuits ◽  
Bipolar Transistors ◽  
Parameter Analysis ◽  
Noise Performance ◽  
Noise Spectral Density ◽  
Breakdown Mechanism ◽  
Breakdown Region

Noise parameters of silicon germanium (SiGe) heterojunction bipolar transistors (HBTs) for different sizes are investigated in the breakdown region for the first time. When the emitter length of SiGe HBTs shortens, minimum noise figure at breakdown decreases. In addition, narrower emitter width also decreases noise figure of SiGe HBTs in the avalanche region. Reduction of noise performance for smaller emitter length and width of SiGe HBTs at breakdown resulted from the lower noise spectral density resulting from the breakdown mechanism. Good agreement between experimental and simulated noise performance at breakdown is achieved for different sized SiGe HBTs. The presented analysis can benefit the RF circuits operating in the breakdown region.

The effect of vertical emitter ballasting resistors on the emitter current crowding effect in heterojunction bipolar transistors

2002 ◽  
Vol 46 (11) ◽  
pp. 1997-2000 ◽  
Author(s):  
Yuchun Chang ◽  
Guotong Du ◽  
Junfeng Song ◽  
Songxin Wang ◽  
Hailin Luo ◽  
...  
Keyword(s):  
Heterojunction Bipolar Transistors ◽  
Bipolar Transistors ◽  
Current Crowding ◽  
Crowding Effect ◽  
Emitter Current
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