Venable LLP
Apparatus and method of controlling operation frequency in DLL circuit
A frequency multiplier increases the frequency of an external clock and outputs a high-frequency external clock. A period determinator determines whether or not a predetermined period of the external clock elapses and outputs a period determination signal. A frequency selector selectively transmits the external clock or the high-frequency external clock to a clock input buffer under the control of a power-up signal and the period determination signal.
Hynix Semiconductor Inc.
H
H03L
inventional
Seong Jun
Lee