Youngho Cho

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A CMOS RF digitally programmable gain amplifier, covering various terrestrial mobile Digital TV standards (DMB, ISDB-T, and DVB-H) is implemented. 13 dB IIP3 improvement is attained without losing out on other performance criteria like gain, NF, CMRR, etc. at similar power consumption. This is achieved by applying a newly proposed differential circuit gm�(More)
—Trust based approaches have been widely used to counter insider attacks in wireless sensor networks because traditional cryptography-based security mechanisms such as authentication and authorization are not effective against such attacks. A trust model, which is the core component of a trust mechanism, provides a quantitative way to evaluate the(More)
This paper addresses a modeling and analysis methodology for investigating the stochastic harmonics and resonance concerns of wind power plants (WPPs). Wideband harmonics from modern wind turbines (WTs) are observed to be stochastic, associated with real power production, and they may adversely interact with the grid impedance and cause unexpected harmonic(More)
Low power CMOS RF digitally programmable gain amplifiers for dual-band (Band-III and L-Band) DAB/T-DMB receiver IC are implemented using 0.18 µ µ µ µm CMOS process. For a stable operation among large interference situation, it is required to have wide gain range and fine resolution in RF domain. In order to meet such requirements, various programmable gain(More)
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