Phase detection circuit
AssigneeSK hynix Inc.
InventorsMyeong Jae Park, Kyung Hoon Kim, Kyu Young Kim, Woo Yeol Shin
Life of this patent
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Abstract
A phase detection circuit includes a sampling signal generation circuit configured to generate a plurality of sampling signals in response to a plurality of phase change clocks having different phases and data; a charging voltage generation circuit configured to compare the plurality of sampling signals, and change a voltage level of one charging voltage between a first charging voltage and a second charging voltage; and a comparison circuit configured to compare voltage levels of the first and second charging voltages, and generate a result signal.
Claims19
A phase detection circuit comprising:
- a sampling signal generation circuit configured to generate a plurality of sampling signals in response to a plurality of phase change clocks having different phases and data;
- a charging voltage generation circuit configured to include capacitors and compare the plurality of sampling signals, and change a voltage level of one charging voltage between a first charging voltage and a second charging voltage;
- and
- a comparison circuit configured to compare voltage levels of the first and second charging voltages, and generate a result signal,
- wherein the comparison circuit compares the voltage levels of the first and second charging voltages and generates the result signal, each time an update signal is enabled, and wherein the update signal is enabled with a predetermined cycle.
A phase detection circuit comprising:
- a first sampling circuit configured to sample data at a first sampling time, and output a first sampling signal;
- a second sampling circuit configured to sample the data at a second sampling time, and output a second sampling signal;
- a third sampling circuit configured to sample the data at a third sampling time, and output a third sampling signal;
- a charging voltage generation circuit configured to include capacitors and raise a voltage level of a first charging voltage according to whether the first and second sampling signals are the same or raise a voltage level of a second charging voltage according to whether the second and third sampling signals are the same;
- and
- a comparison circuit configured to compare the voltage levels of the first and second charging voltages, and generate a result signal,
- wherein the comparison circuit compares the voltage levels of the first and second charging voltages and generates the result signal, each time an update signal is enabled, and wherein the update signal is enabled with a predetermined cycle.
Dependencies are inferred from the claim text.