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Full-Text Articles in Electronic Devices and Semiconductor Manufacturing
Lna Lowers Noise, Raises Oip3 At 3.5 Ghz, Chin-Leong Lim
Lna Lowers Noise, Raises Oip3 At 3.5 Ghz, Chin-Leong Lim
Chin-Leong Lim
A 3.5 GHz LNA with good noise figure, gain and linearity performances has been designed around a low-cost, QFN2x2-packaged monolithic integrated circuit (MMIC). Incorporation of bias regulator, ESD protection and stability network at chip-level reduces the external component count to 12. The proprietary 0.25 um EPHEMT process achieves +15-dB gain in single stage and less than 1 dB noise figure at 3.5 GHz.
Setting New Noise Performance Benchmarks Using Wideband Low-Noise High-Linearity Lnas, Chin-Leong Lim
Setting New Noise Performance Benchmarks Using Wideband Low-Noise High-Linearity Lnas, Chin-Leong Lim
Chin-Leong Lim
Objective: to design a 900 MHz Low-Noise Amplifier (LNA) using a MMIC fabricated on a new ultra low noise GaAs ePHEMT process. To demonstrate a new noise performance bench mark (F = 0.3 dB at IRL ≤ - 15 dB) for the plastic-packaged device class.
Material: The LNA consists of a Microwave Monolithic Integrated Circuit (MMIC) and 9 passive components mounted on a 21.5x18 mm2 Rogers RO4350 micro-strip PCB. The MMIC, which comprises a common-source amplifier and temperature-tracking active bias, is fabricated on a new GaAs ePHEMT process optimized for noise. As loss in the input matching network is proportional …
Mass-Market Designed-For-Cellular Mmics Can Be Gainfully Adapted For Use In Niche Applications On Different Frequencies, Chin-Leong Lim
Mass-Market Designed-For-Cellular Mmics Can Be Gainfully Adapted For Use In Niche Applications On Different Frequencies, Chin-Leong Lim
Chin-Leong Lim
Due to semiconductor manufacturers’ near exclusive focus on high growth markets such as cellular and wireless data, very little commercial RND resource is expended on developing Microwave Monolithic Integrated Circuits (MMIC) for the lower-volume traditional wireless services such as aviation and land mobile, etc. To circumvent the dearth of MMICs in those under-served market segments, we intend to show how off-the-shelf cellular MMICs can be leveraged into non-cellular applications. For this purpose, a MMIC originally conceived as a 900 MHz 0.5W driver amplifier is redeployed to two dissimilar applications: (i) a high linearity Low Noise Amplifier (LNA) for the 400~520 …