Clock generation circuit and voltage generation circuit including the clock generation circuit
AssigneeSK hynix Inc.
InventorHyun Chul Lee
Life of this patent
Estimating the term…
Abstract
A clock generation circuit includes a control clock generation circuit and first and second clock synchronization circuits. The control clock generation circuit compares a reference voltage with first and second feedback clock signals to generate first and second control clock signals. The first clock synchronization circuit makes the first and second feedback clock signals transit in synchronization with the first and second control clock signals. The second clock synchronization circuit generates first and second phase clock signals in synchronization with the first feedback clock signal and the second feedback clock signal.
Claims8
A clock generation circuit comprising:
- an initialization control circuit generating a first initialization signal and a second initialization signal, which transition at different time points, based on a control pulse signal;
- a first clock generation circuit generating a first phase clock signal and a second phase clock signal having different phases from each other through a synchronization operation based on the first initialization signal;
- and
- a second clock generation circuit generating a third phase clock signal and a fourth phase clock signal having different phases from each other through a synchronization operation based on the second initialization signal
- wherein the control pulse signal includes a pulse corresponding to a half period of a target phase clock signal, and
- wherein the initialization control circuit controls a time point when the first initialization signal transitions based on a first edge of the pulse included in the control pulse signal and controls a time point when the second initialization signal transitions based on a second edge of the pulse included in the control pulse signal.
Dependencies are inferred from the claim text.