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Data strobe signal generator for generating data strobe signal based on adjustable preamble value and semiconductor memory device with the same
Data strobe signal generator for generating data strobe signal based on adjustable preamble value and semiconductor memory device with the same
A data strobe signal generator includes a control unit, a pulse delay unit, a clock generator, and a data strobe output unit. The control unit generates a CAS latency signal and a preamble signal. The pulse delay unit delays a pulse signal for predetermined time and outputs a delayed pulse signal. The clock generator outputs a control clock signal. The data strobe output unit outputs a data strobe signal. The data strobe signal generator and the semiconductor memory device having the same generate a data strobe signal based on an adjustable preamble value, thereby ensuring the stabilized data output operation of a high-speed memory device.
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