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A high performance current-reused CMOS LC-voltage-controlled oscillator (LC-VCO) for WiMAX communication and internet application is fabricated in TSMC 0.18-µm CMOS process. The proposed VCO applies the complementary cross-coupled technique and uses differentially tuned accumulation MOS varactors. Measured results achieve 27.86% frequency tuned range when biased between 0–1.8 V, tunable output frequency...
A digital third-order MASH 1-1-1 delta-sigma (ΔΣ) modulator (DSM) is designed and implemented on field programmable gate array (FPGA) customer board (Lyrtech) in fractional-N phase-locked loop (PLL). Fractional-N frequency synthesizers have many advantages over their conventional counterparts, integer-N synthesizers. These include, among others, high frequency resolution, fast channel switching speed,...
A system in package low-voltage bandgap voltage reference (BGR) implemented in 90 nm CMOS process is designed, simulated, and measured. The bandgap reference circuit is optimized before fabrication in order to generate a temperature independent voltage reference. The load of output stage is a MOSFET active device controlled by the voltage reference so that the output accuracy increases. The overall...
A low-power and area-efficient LC-VCO is designed for 10 GHz application. The proposed VCO circuit applies PMOS cross-coupled pairs LC circuits and implemented in TSMC 0.18-um CMOS process. Measured results achieve tuning range of 9.25 to 9.782 GHz, corresponding to 5.6 %, phase noise of -116 dBc/Hz at 1 MHz offset from 9.78 GHz while the tuned control voltage is adjustable from 0 to 0.9V and output...
A 1-V 5.8 GHz CMOS front-end applying in dedicated biomedical systems has been successfully implemented by TSMC 0.18 µm CMOS process. This system has built in near-infrared laser-driven (NIRLD) might be a promising wireless electrical power source and phase in wake up receiver technology using direct active RF detection for biomedical nanodevices power saving. This proposed prototype includes an input...
Peak shift is the function to shift the daytime's mobile electronic device power demand to the nighttime. Peak shift application program controls "forced battery operation mode" and "disable battery charge mode" based on the time table. "Forced battery operation mode" is the status that EC turns off the AC adapter power line switch.mobile electronic device is switched...
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