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A fully integrated THz phase-locked loop (PLL) is proposed. It is consists of a fundamental PLL and a frequency doubler. In order to improve the oscillation frequency and reduced the phase noise, a feedback network composed of buffer amplifiers and capacitors is introduced to the voltage-controlled oscillator (VCO). The wide locking-range divider chain of PLL consists of an injection-locked frequency...
In this paper, a fully integrated 24GHz integer-N PLL for a 60GHz wireless transceiver is presented. A VCO with tail-feedback technique is used to improve the phase noise by modulating the tail current, and a switched varactor array is also adopted together with a switched capacitor array to compensate the variation of KVCO over different bands. Moreover, benefiting from the careful optimization of...
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