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Phase-locked loop for communication between integrated circuit systems, has charge pump receiving control signals generated in response to comparison of reference clock signal and feedback signal
Phase-locked loop for communication between integrated circuit systems, has charge pump receiving control signals generated in response to comparison of reference clock signal and feedback signal
The loop (21) has a charge pump (22) receiving two control signals generated in response to a comparison of phases of a reference clock signal and a feedback signal. An operational amplifier with an input that receives a signal of the charge pump, and other two inputs receive the two control signals, respectively. A voltage controlled oscillator receives a control voltage signal and generates a feedback clock signal. Independent claims are also included for the following: (A) a memory system comprising a memory controller and memory modules with memory device (B) a method for receiving charge pump control signals.
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