2024-03-29T06:06:13Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/585402022-11-17T02:08:08Zhdl_2115_20045hdl_2115_139Design and fabrication of 2.4 GHz pre-biased rectifierOtsu, YutaroKubo, KeishiIkebe, MasayukiSano, EiichiRectifierSensor network2.4 GHzRFLow-power pulse generatorSubthreshold CMOS549A 2.4 GHz rectifier operating in a region of low RF input power was developed. The rectifier has a cross-coupled bridge configuration and is driven by a differential RF input signal. Since a rectifier needs an RF signal higher than the threshold voltage of transistors, we introduced a pre-biasing circuit to compensate for the threshold voltage. A low-voltage digital circuit, subthreshold voltage regulator, and low-power level shifter were introduced for reducing the power consumption of the pre-biasing circuit and increasing the driving voltage for the switches at the same time. The circuit simulations revealed that the pre-biasing circuit was effective in a low RF input power region. However, the output voltage was degraded in a high power region. Then, we combined the pre-biased rectifier in parallel with a non-biased rectifier. Three types of rectifiers consisting of LC matching circuits, three-stage rectifier cells, and biasing circuits were designed and fabricated using a 0.18-mu m mixed signal/RF CMOS process with one poly and six metal layers. The fabricated pre-biased rectifier operated in a region of RF input power of less than -15 dBm, while the non-biased rectifier could not operate in this region. The parallel combination of pre-biased and non-biased rectifiers effectively solved the drawback of the pre-biased rectifier in a high RF input power region.SpringerJournal Articleapplication/pdfhttp://hdl.handle.net/2115/58540https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/58540/1/AICSP79-2%20301-307.pdf0925-1030Analog integrated Circuits and Signal Processing7923013072014-05enginfo:doi/10.1007/s10470-014-0256-6The final publication is available at link.springer.comauthor