Back to results
US 8,265,218 B2Granted
Phase detection circuit
AssigneeSK hynix Inc.
InventorsYong Ju Kim, Kun Woo Park, Jong Woon Kim, Hee Woong Song, Ic Su Oh, Hyung Soo Kim, Tae Jin Hwang
Life of this patent
Estimating the term…
Abstract
A phase detection circuit includes a phase frequency detector for comparing a first input signal and a second input signal and outputting a first phase comparison signal and a second phase comparison signal, and a sensing circuit for sensing a pulse width difference between the first phase comparison signal and the second phase comparison signal and outputting phase detection signals which have different logic values.
Claims22
A phase detection circuit comprising:
- a phase frequency detector configured to compare a first input signal and a second input signal and output a first phase comparison signal and a second phase comparison signal;
- and
- a sensing circuit configured to select, as an output, a sensing result or an integration value of a plurality of the sensing result based on an operation mode signal, wherein
- the sensing result is generated by sensing a pulse width difference between the first phase comparison signal and the second phase comparison signal,
- the phase detection circuit is configured to support a coarse mode and a fine mode of a Delay Locked Loop circuit, and
- the operation mode signal defines one mode of the coarse mode and the fine mode.
3 more elements
A phase detection circuit comprising:
- a phase frequency detector configured to compare a first input signal and a second input signal and output a first phase comparison signal and a second phase comparison signal;
- a sensing circuit configured to select, as an output a sensing result or an integration value of a plurality of the sensing result based on an operation mode signal, wherein the sensing result is generated by sensing a pulse width difference between the first phase comparison signal and the second phase comparison signal, and the output of the sensing circuit is precharged in response to a precharge signal;
- and
- a control circuit configured to vary a sensing period of the sensing circuit in response to the operation mode signal, wherein
- the phase detection circuit is configured to support a coarse mode and a fine mode of a Delay Locked Loop circuit, and
- the operation mode signal defines one mode of the coarse mode and the fine mode.
3 more elements
Dependencies are inferred from the claim text.