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UHF 대역 RFID Tag용 저전력 아날로그 회로 설계
심현철(H. C. Shim),박종태(J. T. Park),유종근(C. G. Yu) 대한전자공학회 2006 대한전자공학회 학술대회 Vol.2006 No.11
This paper describes a low-power analog front-end block for UHF(860~960㎒) band RFID tags. It satisfies ISO/IEC 18000-6 type C(EPCgolbal class1. generation2.) and operates with an internally generated power supply of 1V. It contains a rectifier, a voltage regulator, an ASK demodulator, a bandgap reference, a clock generator, a power-on-reset circuit, and a backscatter modulator. It is designed using a 0.18㎛ CMOS technology. The simulation results show that the designed circuit can operate properly with an input as low as 0.2Vpeak and consumes 25.2㎂.
차충현(C. H. Cha),심현철(H. C. Shim),전석희(S. H. Jeon),유종근(C. G. Yu) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.10
In this paper, a 10Gb㎰ Clock and Data Recovery circuit is designed in 0.18㎛ CMOS Technology. The circuit incorporates a multiphase LC oscillator, a quarter-rate Bang-Bang phase detector, a Charge Pump and a second order loop filter. The simulation results show that the designed circuit has a peak-to-peak clock jitter of 4.1㎰ and a peak-to-peak recovered data jitter of 8㎰ while consuming about 44㎽ from a I.8V supply.
박준규(J. K. Park),심현철(H. C. Shim),박종태(J. T. Park),유종근(C. G. Yu) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.10
This paper describes a 2.5V, 320㎒ low-noise and low-power Phase Locked Loop(PLL) using a noise-rejected Voltage Controlled ring Oscillator(VCO) fabricated in a TSMC 0.25㎛ CMOS technology. In order to improve the power consumption and oscillation frequency of the PLL, The VCO consist of three-stage fully differential delay cells that can obtain the characteristic of high speed, low power and low phase noise. The VCO operates at 7㎒-670㎒. The oscillator consumes 1.58㎃ from a 320㎒ frequency and 2.5V supply. When the PLL with fully-differential ring VCO is locked 320㎒, the jitter and phase noise measured 26㎰ (rms), 157㎰ (p-p) and -97.09㏈ at 100㎑ offset. We introduce and analysis the conditions in which ring VCO can oscillate for low-power operation.