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Phase comparator with improved comparison precision and synchronous semiconductor memory device employing the same
Phase comparator with improved comparison precision and synchronous semiconductor memory device employing the same
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机译:具有提高的比较精度的相位比较器以及使用该相位比较器的同步半导体存储装置
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摘要
The phase comparator receives an output of a buffer receiving the first input signal and an output of a buffer receiving the second input signal, and outputs signals SLOW, FAST as a result of phase comparison. The phase comparator includes a waveform processing circuit for enlarging the phase difference between two input signals, and a comparison circuit for performing phase comparison based on the phase difference enlarged by the waveform processing circuit and outputting signals SLOW, FAST. Because of the function of the waveform processing circuit, the performance of the phase comparator can be improved significantly, without having to largely improve the performance of the comparison circuit.
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