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摘要
A modified divide-by-2 regenerative frequency divider (RFD) is presented in this paper. The effects of modified active loads on the bandwidth of RFD are demonstrated and analyzed in detail by introducing the equivalent circuit using pi model. Using the transimpedance amplifier structure with resistive shunt-shunt feedback and shunt-peaked inductor as the active loads of the generative frequency divider, the loop bandwidth and the loop gain can be increased at higher frequencies to extend the bandwidth. Based on the theoretical analysis and design methodology, an RFD with improved active loads is designed and fabricated in 1 mu m GaAs heterojunction bipolar transistor technology with a total chip area of 0.83mm x 0.75mm. The measured phase noise at the divider output is less than -110 dBc/Hz with 100kHz offset and is -127.6 dBc/Hz with 1MHz offset. The operation frequency range is from 10 to 26GHz. The power consumption of the divider core is 166.44mW, and the frequency bandwidth is 16GHz at a supply voltage of -6V.
- 出版日期2018-3
- 单位西安电子科技大学
