US 7,605,610 B2 · Differential current driving type transmission system

Abstract

There is provided a differential current driving current type transmission system. The system includes a transmission line pair for transmitting a signal by a differential scheme; a transmission unit having a transmission circuit for making the transmission line pair have a current difference according to a logic value of a transmission signal and equalizing the transmission line pair at a predetermined timing, and a transmission controller for controlling the signal transmission of the transmission circuit and the equalization of the transmission line pair; and a receiving unit having an I-V converter circuit for mirroring a current difference of the transmission line pair and converting the current difference into a voltage difference, and a differential amplifier for amplifying the voltage difference of the I-V converter circuit.

Claims30

Dependent claims

A transmitter for use in a differential current driving type system, comprising:

a current source means for supplying different current amount to a first and a second lines of a transmission line pair in response to a logic value of data transmitted through the first and the second lines;
and
a transmission controller for controlling the current source means,
wherein the current source means includes an equalizing switch for connecting the first line with the second line to equalize a first potential level of the first line and a second potential level of the second line
wherein the transmission controller controls the equalizing switch to be turned off for a predetermined time when the data to be transmitted in a current data period is different from a previous data bit transmitted in a previous data period, to be turned on after the predetermined time, and to maintain turn-on during a time period that the logic value of the data to be transmitted is not changed.

2 more elements

A differential current driving type transmission system, comprising:

a transmission line pair for transmitting a signal by a differential scheme;
a transmission unit including a transmission circuit for making the transmission line pair have a current difference according to a logic value of a transmission signal and equalizing the transmission line pair at a predetermined timing, and a transmission controller for controlling the signal transmission of the transmission circuit and the equalization of the transmission line pair;
and
a receiving unit including an I-V converter circuit for mirroring a current difference of the transmission line pair and converting the current difference into a voltage difference, and a differential amplifier for amplifying the voltage difference of the I-V converter circuit,
wherein the transmission circuit includes an equalizing switch for connecting the transmission line pair to each other to equalize a first potential level of a true line and a second potential level of a bar line
wherein the transmission controller controls the equalizing switch to be turned off for a predetermined time when the data to be transmitted in a current data period is different from a previous data bit transmitted in a previous data period, to be turned on after the predetermined time, and to maintain turn-on during a time period that the logic value of the data to be transmitted is not changed.

3 more elements

Dependencies are inferred from the claim text.

Differential current driving type transmission system

Life of this patent

Differential current driving type transmission system

Life of this patent

Abstract

Claims30