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US 2016/0254931 A1Published application
Termination circuit, and interface circuit and system including the same
AssigneeSK hynix Inc.
InventorHae Kang JUNG
Life of this patent
Estimating the term…
Abstract
An interface circuit may include a termination resistor and a termination voltage generation unit. The termination resistor may be coupled between a reception pad and a termination node. The termination voltage generation unit may detect a voltage level of the termination node, and may drive the termination node to a level of a termination voltage when the voltage level of the termination node deviates from a predetermined range.
Claims19
An interface circuit comprising:
- a termination resistor coupled between a reception pad and a termination node;
- and
- a termination voltage generation circuit configured to detect a voltage level of the termination node, and drive the termination node to a level of a termination voltage when the voltage level of the termination node deviates from a predetermined range,
- wherein the termination voltage generation circuit comprises a first comparator configured to compare the voltage level of the termination node and an up reference voltage, and generate a first comparison signal, a pull-up driver configured to pull-up drive the termination node in response to the first comparison signal, a second comparator configured to compare the voltage level of the termination node and a down reference voltage, and generate a second comparison signal, and a pull-down driver configured to pull-down drive the termination node in response to the second comparison signal,
- wherein the pull-up driver comprises a first resistor element coupled with a power supply voltage, and a first switching element coupled between the first resistor element and the termination node, and configured to be turned on in response to the first comparison signal,
- wherein the pull-down driver comprises a second resistor element coupled with a ground voltage, and a second switching element coupled between the second resistor element and the termination node, and configured to be turned on in response to the second comparison signal,
- wherein an impedance value of the first resistor element is substantially the same as an impedance value of the second resistor element, and the impedance values of the first and second resistor elements are less than the impedance value of the termination resistor.
4 more elements
8-13. (canceled)
An interface circuit comprising:
- a termination resistor coupled between a reception pad and a termination node;
- and
- a termination voltage generation circuit configured to detect a voltage level of the termination node, and drive the termination node to a level of a termination voltage when the voltage level of the termination node deviates from a predetermined range,
- wherein the termination voltage generation circuit comprises a first comparator configured to compare the voltage level of the termination node and an up reference voltage, and generate a comparison signal, a second comparator configured to compare the voltage level of the termination node and a down reference voltage, and generate the comparison signal, a pull-up driver configured to pull-up drive the termination node in response to the comparison signal, and a pull-down driver configured to pull-down drive the termination node in response to the comparison signal.
1 more element
A system comprising:
- a transmission device configured to drive a signal transmission line and transmit a signal;
- and
- a reception device coupled with the signal transmission line, and configured to receive the signal,
- the reception device comprising:
- a termination resistor coupled between the signal transmission line and a termination node;
- and
- a termination voltage generation circuit configured to detect a voltage level of the termination node, and drive the termination node to a level of a termination voltage when the voltage level of the termination node deviates from a predetermined range,
- wherein the termination voltage generation circuit comprises a first comparator configured to compare the voltage level of the termination node and an up reference voltage, and generate a comparison signal, a second comparator configured to compare the voltage level of the termination node and a down reference voltage, and generate the comparison signal, a pull-up driver configured to pull-up drive the termination node in response to the comparison signal, and a pull-down driver configured to pull-down drive the termination node in response to the comparison signal.
5 more elements
18-19. (canceled)
A termination circuit comprising:
- a termination resistor;
- and
- a termination voltage generation circuit coupled to the termination resistor through a termination node,
- wherein the termination voltage generation circuit is configured to detect a voltage level of the termination node, and drive the termination node to a level of a termination voltage when the voltage level of the termination node deviates from a predetermined range,
- wherein the termination voltage generation circuit comprises a first comparator configured to compare the voltage level of the termination node and an up reference voltage, and generate a comparison signal, a second comparator configured to compare the voltage level of the termination node and a down reference voltage, and generate the comparison signal, a pull-up driver configured to pull-up drive the termination node in response to the comparison signal, and a pull-down driver configured to pull-down drive the termination node in response to the comparison signal.
2 more elements
Dependencies are inferred from the claim text.