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We design PDLL that has a PLL and a DLL with different roles. The DLL, which is used for phase compensation, is digital with low power consumption. The PLL, which is used for jitter reduction, is a charge-pump type with dual KVCO and self-mode-shifting scheme, using an unregulated power supply for flexibility in operating range. Powering the PLL with an unregulated power supply is made possible by...
We design a DLL that has a slew-rate controlled duty-cycle-correction (DCC) with a fully digital controlled duty-cycle-error detector and has the update gear circuit to shift update mode for low power consumption. The DLL is composed of a dual loop and two types of digital DCC, at the input and output, which have a higher DCC capability when combined. We also design a clock receiver that generates...
A new low power, low cost and high performance register-controlled digital delay locked loop with wide locking range is presented. The DLL has dual loops with single replica block, duty cycle correction enhance controller (DCCEC), smart power down controller (SPDC) for reducing the standby current during power down, and locking range doubler for wide locking range. The digital DLL used for 3 Gbps...
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