Design of a Programmable Low-pass Filter for UHF RFID ZIF Receivers
A programmable low-pass field for 860~960MHz UHF RFID ZIF(zero IF)receivers was designed in 0.18 μm CMOS process.Taking into account the high linearity requirements,the Active-RC field was selected.Moreover,a fully differential operational amplifier with common-mode feedback(CMFB)was employed as a critical building block.With a 4th-order but-terworth low-pass-type topology,based on the tow-thomas biquad,the field was synthesized.Its bandwidth can be programmed to 480/600/700/900/1100/1680 kHz with an attenuation greater than 50 dB at frequencies of 10 ×(f)c(cutoff frequency).The field exhibits many advantages,such as low order,low power consumption,small size,wide cutoff frequency selection range and high linearity.From a single 1.8V power supply,simulations show that the field has an input referred noise of 98.95 nV/√Hz,a third-order intercept point(IIP3)of 24.25 dBm,and a power consumption of 12.42mW.
C.C.Zhang C.Wang Y.F.Guo Y.M.Fang L.L.Liu D.Y.Chen W.Li
Power and RF Microelectronic Research Centre Nanjing University of Posts and Telecommunications,Nanj Power and RF Microelectronic Research Centre Nanjing University of Posts and Telecommunications,Nanj
国际会议
Progress in Electromagnetics Research Symposium 2013(2013年电磁学研究新进展学术研讨会)
台北
英文
914-918
2013-03-01（万方平台首次上网日期，不代表论文的发表时间）