US 9,312,846 B2Granted

Driver circuit for signal transmission and control method of driver circuit

AssigneeMediatek Inc.

InventorsChien-Hua Wu, Yan-Bin Luo

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Abstract

A driver circuit for receiving a data input and generating an output signal according to at least the data input is provided. The driver circuit includes a pair of differential output terminals, a current mode drive unit and a voltage mode drive unit. The pair of differential output terminals has a first output terminal and a second output terminal. The current mode drive unit is arranged for outputting a first reference current from one of the first and second output terminals and receiving the first reference current from the other of the first and the second output terminals according to the first data input. The voltage mode drive unit is arranged for coupling a first reference voltage to one of the first and the second output terminals and coupling a second reference voltage to the other of the first and the second output terminals according to the first data input.

Claims20

Dependent claims

A driver circuit for receiving a first data input and generating an output signal to a termination element according to at least the first data input, the driver circuit comprising:

a pair of differential output terminals, arranged for outputting the output signal, wherein the pair of differential output terminals has a first output terminal and a second output terminal;
a first current mode drive unit, coupled to the pair of differential output terminals, the first current mode drive unit arranged for generating a first reference current, outputting the first reference current from one of the first output terminal and the second output terminal to the termination element according to the first data input, steering the first reference current to flow into the termination element such that the first reference current outputted from the first current mode drive unit flows through the termination element and is used as at least a portion of a current flowing through the termination element, and receiving the first reference current from the other of the first output terminal and the second output terminal according to the first data input;
and
a voltage mode drive unit, coupled to the pair of differential output terminals, the voltage mode drive unit arranged for providing a first reference voltage and a second reference voltage different from the first reference voltage, coupling the first reference voltage to one of the first output terminal and the second output terminal according to the first data input, and coupling the second reference voltage to the other of the first output terminal and the second output terminal according to the first data input.

1 more element

A control method of a driver circuit, the driver circuit receiving a first data input and generating an output signal to a termination element according to at least the first data input, the driver circuit comprising a pair of differential output terminals for outputting the output signal, the pair of differential output terminals having a first output terminal and a second output terminal, the control method comprising:

generating a first reference current;
outputting the first reference current from one of the first output terminal and the second output terminal to the termination element according to the first data input, steering the first reference current to flow into the termination element such that the first reference current outputted from the pair of differential output terminals flows through the termination element and is used as at least a portion of a current flowing through the termination element, and receiving the first reference current from the other of the first output terminal and the second output terminal according to the first data input;
providing a first reference voltage and a second reference voltage different from the first reference voltage;
and
coupling the first reference voltage to one of the first output terminal and the second output terminal according to the first data input, and coupling the second reference voltage to the other of the first output terminal and the second output terminal according to the first data input.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/280,701Filed 19 May 2014 · us provisional application
Priority: 16 Jul 2013
Published: US 2015/0022243 A122 Jan 2015
Granted: 12 Apr 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

H03K 17/16
Electronic switching or gating, i.e. not by contact-making and –breaking: modifications for eliminating interference voltages or currents
H03K 19/018578
Of complementary type, e.g. CMOS: with at least one differential stage
H03K 19/018585
Using field effect transistors only: programmable
H04L 25/00
Baseband systems