Search Results - james+hwang

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Monolithic High Voltage Impulse Amplifier Using HBT
A novel amplifier has been developed that is capable of producing significantly more power in comparison to currently existing amplifiers. The given impulse amplifier is able to generate narrow impulses with high amplitudes, high gain, high efficiency, and is compact in size. The amplifier also contains additional control circuits designed for fine-tuning...
Published: 10/20/2009   |   Updated: 10/14/2009   |   Inventor(s): James Hwang, Subrata Halder, Renfeng Jin
Keywords(s):  
Category(s): Electronics
Adaptive Dummy-gate (field-plate) Bias Technique for RF LDMOSFETs (Technology#: 090506-01)
This invention uncovers a method of applying a suitable modulated bias to the dummy-gate (or field-plate) in RF-LDMOSFETs to improve the efficiency and output power. Initial tests of this technique show a 60% improvement in the maximum output power, and a 10% improvement in the efficiency of the device. The increase in output power will translate...
Published: 10/14/2009   |   Updated: 2/20/2009   |   Inventor(s): James Hwang, Marvin Marbell
Keywords(s): Adaptive Bias, Dummy-Gate, RF power amplifiers
Category(s): Wireless
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