Hynix Semiconductor Inc.

Si-Hong Kim

Sang-Sic Yoon

Young-Jin Yoon

An apparatus for controlling a latency in a synchronous semiconductor device. The apparatus includes a first counting block for counting a cycle of a first clock signal to thereby generate a first binary code; a second counting block for counting a cycle of a second clock signal to thereby generate a second binary code. The second clock signal is obtained by delaying the first clock signal by a predetermined delay amount, A code comparison block stores the second binary code in response to a command and compares the first binary code with the second binary code to thereby generate a latency control signal.

Apparatus and method for latency control in high frequency synchronous semiconductor device

A synchronous memory device which generates a data output enable signal corresponding to a set CAS latency mode including: a control clock generator for generating an A-type first control clock and a B-type first control clock; a first redundancy enable signal generator for shifting an internal read signal by a predetermined interval in synchronization with one of the A-type first control clock and the B-type first control clock and generating a plurality of first redundancy enable signals; a second redundancy enable signal generator for synchronizing the plurality of first redundancy enable signals with a DLL clock and generating a plurality of second redundancy enable signals; and an output enable signal generator for selecting one redundancy enable signal corresponding to the set CAS latency mode among the first redundancy enable signals and the second redundancy enable signals and generating the selected redundancy enable signal as the data output enable signal.

Memory device with improved output operation margin

A semiconductor device has a DLL circuit for generating an internal clock signal by receiving an external clock signal, wherein the DLL circuit includes a delay model for modeling delay time of an intern clock signal delayed from an external clock signal and a power supply for adjusting a core voltage by an input output voltage and supplying the adjusted voltage to the delay model.

Growing community of inventors

Ichon-shi, South Korea

Si-Hong Kim