US 7,456,650 B2Granted

Memory system with stable termination of a pair of differential signals transmitted via a pair of transmission lines

AssigneeSamsung Electronics Co., Ltd.

InventorDong-yang Lee

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Abstract

Provided is a memory system in which a pair of differential signals transmitted via a pair of transmission lines are prevented from being terminated at the same voltage during a standby mode, thereby preventing a receiver from entering an unstable state. The memory system includes a pair of transmission lines, a transmitter that outputs a pair of differential signals to the pair of transmission lines, and a receiver that receives the pair of differential signals via the pair of transmission lines. A first termination voltage is applied to one of the pair of transmission lines, and a second termination voltage is applied to the other transmission line. The first termination voltage is determined to be different from the second termination voltage.

Claims6

Dependent claims

A system comprising:

a single-ended transmission line;
a pair of differential transmission lines;
a transmitter outputting a single-ended signal to the single-ended transmission line and a pair of differential signals to the pair of differential transmission lines;
a receiver receiving the single-ended signal via the single-ended transmission line and the pair of differential signals via the pair of differential transmission lines;
a first termination voltage applied to one of the pair of differential transmission lines;
a second termination voltage applied to the other differential transmission line;
and
a third termination voltage applied to the single-ended transmission line;
a first termination resistor, one end of which is connected to one of the pair of differential transmission lines;
a second termination resistor, one end of which is connected to the other of the pair of differential transmission lines;
a third termination resistor, one end of which is connected to the single-ended transmission line,
wherein the first termination voltage is different from the second termination voltage, and the third termination voltage is half a power supply voltage applied to the transmitter, and
wherein the resistance values of the first termination resistor, the second termination resistor and the third termination resistor are substantially equivalent.

10 more elements

Dependencies are inferred from the claim text.