A 5.8-GHz FREQUENCY SYNTHESIZER CHIP DESIGN FOR WORLDWIDE INTEROPERABILITY FOR MICROWAVE ACCESS APPLICATION

作者：Huang Jhin Fang^*; Shih Chun Wei; Liu Ron Yi

来源：Microwave and Optical Technology Letters, 2011, 53(12): 2931-2935.

DOI：10.1002/mop.26405

• frequency synthesizer
• voltage-controlled oscillator
• VCO
• phase noise
• programmable divider

A 5.8-GHz frequency synthesizer using wideband LC-tank voltage-controlled oscillator (VCO) for worldwide interoperability for microwave access applications with a 1.8 V voltage supply has been designed and successfully implemented in TSMC 0.18 mu m CMOS process. In this proposed circuit, two important ideas are applied. First, a 3-bit binary weighted capacitor array in the VCO is adopted to extend the tuning range and reduce the phase noise. Second, a class-AB current mode logic is utilized in first divider stage to handle the high frequency signal. Measured results show that output frequency of VCO is tunable from 5.3 to 6.1 GHz corresponding to 14.1%, and phase noise is -110.2 dBc/Hz at 1 MHz offset, output power spectrum is -9.24 dBm at frequency of 5.73 GHz, power consumption is 32 mW, and including pads, chip area is 0.53 ( 0.82 x 0.65) mm(2).

• 出版日期2011-12