Analog Integrated Circuits and Signal Processing ( IF 1.4 ) Pub Date : 2020-08-04 , DOI: 10.1007/s10470-020-01694-x Qingshan Liu , Changchun Chai
A novel temperature-compensated LC-VCO is presented for RFID applications. By employing a low pass passive filter and an auxiliary varactor loop, the frequency drift is reduced by 70% without using any other active device. The effectiveness of the technique is demonstrated on a frequency synthesizer of a RFID transceiver. The frequency synthesizer is fabricated on a 0.18 μm RF process with a single supply of 1.8 V. The empirical measurements show that the VCO achieves a current consumption of 6 mA, while the passive temperature-compensated circuit does not increase the power consumption. The VCO has a tuning range of 1.6–2.1 GHz and phase a noise of − 124 dBc/Hz at 1 MHz offset from the 1.824 GHz carrier.
中文翻译:
用于RFID收发器的1.8 GHz温度漂移补偿LC-VCO
提出了一种针对RFID应用的新型温度补偿LC-VCO。通过采用低通无源滤波器和辅助变容环路,无需使用任何其他有源器件即可将频率漂移降低70%。在RFID收发器的频率合成器上证明了该技术的有效性。频率合成器采用0.18μm射频工艺制造,单电源为1.8V。经验测量表明,VCO达到6 mA的电流消耗,而无源温度补偿电路并未增加功耗。VCO的调谐范围为1.6–2.1 GHz,与1.824 GHz载波偏移1 MHz时,相位噪声为− 124 dBc / Hz。