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Seoul, South Korea

Jung J.,Gwangju Institute of Science and Technology | Kwak C.,Luxen Technologies Inc. | Lee J.,Gwangju Institute of Science and Technology
Radioengineering | Year: 2012

In this paper, the third order intermodulation distortion (IMD3) of three-stage power amplifier (PA) is analyzed using the Volterra series. The analysis explains how the total IMD3 of the three-stage power amplifier can be reduced by the first-stage bias condition. The threestage PA, which is fabricated using InGaP/GaAs heterojunction bipolar transistor (HBT), operates with an optimized first driver stage bias for higher P1dB and good gain flatness. The power amplifier has been designed for 1626.5 MHz~1660.5 MHz satellite mobile communications. With π/4 DQPSK modulation signals, this PA can deliver a highly linear output power of 33 dBm from 3.6V supply voltage. At 33 dBm output power, it shows a gain of 31.9 dB, a power-added efficiency (PAE) of 39.8%, an adjacent channel power ratio (ACPR) of -28.2 dBc at a 31.25 kHz offset frequency. Source


Patent
Luxen Technologies Inc. | Date: 2012-02-17

Embodiments of the present invention provide a computer-implemented method for parallel readout for an X-ray image sensor module having a pixel array. Specifically, among other things, embodiments of the present invention provide a computer-implemented infrastructure comprising: generating a pixel data for each pixel within a respective pixel row of the pixel array based on a photon count; receiving a first serial pixel data, wherein the first serial pixel data comprises pixel data from a plurality of pixels of a first column; receiving a second serial pixel data, wherein the second serial pixel data comprises pixel data from a plurality of pixels of a second column; and shifting the first serial pixel data from the first column register to the second column register.


Patent
Luxen Technologies Inc. | Date: 2012-03-02

Embodiments of the present invention provide a computer-implemented method for parallel readout for an X-ray image sensor module having a pixel array. Specifically, among other things, embodiments of the present invention provide a computer-implemented infrastructure comprising: generating a first pixel data for each pixel within a first pixel row of the pixel array based on a first photon count; generating a second pixel data for each pixel within a second pixel row of the pixel array based on a second photon count; receiving the first serial pixel data at a buffer; transmitting the first serial data to a column bus line; and receiving the second serial pixel data at the buffer, wherein the second serial pixel data is received at the buffer in parallel to the transmitting the first serial data to the column bus line.


Patent
Luxen Technologies Inc. | Date: 2012-03-28

Embodiments of the present invention provide a computer-implemented method for determining an amplification gain for an X-ray image sensor module. Specifically, among other things, embodiments of the present invention provide a computer-implemented infrastructure comprising: capturing an electrical signal by a pixel sensor; and determining an amplification gain of the electrical signal at a charge sensitive amplifier by turning a switch on or off, wherein the switch connects the pixel sensor to a capacitor.


Embodiments of the present invention provide an approach for improving overall chip speed by providing one or more sampling circuits in an ROIC so that signal processing and signal reading out operations may occur simultaneously instead of successively.

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