US 10,700,652 B2 · Ethernet line driver

Abstract

Some aspects of the disclosure provide for a circuit. In an example, the circuit includes an amplifier, a first transistor network, a second transistor network, a first resistor, a second resistor, and a third resistor. The amplifier has first and second inputs and first, second, third, and fourth outputs. The first transistor network is coupled to the first output of the amplifier and the second output of the amplifier. The second transistor network is coupled to the third output of the amplifier and the fourth output of the amplifier. The first resistor is coupled between the first transistor network and the second transistor network. The second resistor is coupled between the first transistor network and the first input of the amplifier. The third resistor is coupled between the second transistor network and the second input of the amplifier.

Claims18

Dependent claims

A circuit, comprising:

an amplifier having first and second inputs and first, second, third, and fourth outputs;
a first transistor network coupled to the first output of the amplifier and the second output of the amplifier;
a second transistor network coupled to the third output of the amplifier and the fourth output of the amplifier;
a first resistor coupled between the first transistor network and the second transistor network;
a second resistor coupled between the first transistor network and the first input of the amplifier;
and
a third resistor coupled between the second transistor network and the second input of the amplifier;
wherein the first transistor network comprises:
a first mirrored stage comprising a first transistor and a second transistor;
and
a first output stage comprising a third transistor and a fourth transistor.

8 more elements

A circuit, comprising:

an amplifier having first and second inputs and first, second, third, and fourth outputs;
a first transistor network coupled to the first output of the amplifier and the second output of the amplifier;
a second transistor network coupled to the third output of the amplifier and the fourth output of the amplifier;
a first resistor coupled between the first transistor network and the second transistor network;
a second resistor coupled between the first transistor network and the first input of the amplifier;
and
a third resistor coupled between the second transistor network and the second input of the amplifier;
wherein the second transistor network comprises:
a second mirrored stage comprising a fifth transistor and a sixth transistor;
and
a second output stage comprising a seventh transistor and an eighth transistor.

8 more elements

A circuit, comprising:

a fully-differential amplifier having first and second inputs and first, second, third, and fourth outputs;
an output transistor stage;
a mirrored transistor stage;
a first resistor coupled between the mirrored transistor stage and the output transistor stage;
a second resistor coupled between the mirrored transistor stage and the output transistor stage;
and
a third resistor coupled between first resistor and the second resistor;
wherein the mirrored transistor stage comprises:
a first transistor having a source terminal coupled to a voltage supply node, a drain terminal coupled to a first node, and a gate terminal coupled to the first output of the amplifier;
a second transistor having a source terminal coupled to a ground node, a drain terminal coupled to the first node, and a gate terminal coupled to the second output of the amplifier;
a third transistor having a source terminal coupled to the voltage supply node, a drain terminal coupled to a second node, and a gate terminal coupled to the third output of the amplifier;
and
a fourth transistor having a source terminal coupled to the ground node, a drain terminal coupled to the second node, and a gate terminal coupled to the fourth output of the amplifier.

10 more elements

A circuit, comprising:

a current-mode driver, comprising:
a fully-differential amplifier having first and second inputs and first, second, third, and fourth outputs;
a first transistor network comprising:
a first transistor having a source terminal coupled to a voltage supply node, a drain terminal coupled to a first node, and a gate terminal coupled to the first output of the amplifier;
a second transistor having a source terminal coupled to a ground node, a drain terminal coupled to the first node, and a gate terminal coupled to the second output of the amplifier;
a third transistor having a source terminal coupled to the voltage supply node, a drain terminal coupled to a second node, and a gate terminal coupled to the first output of the amplifier;
a fourth transistor having a source terminal coupled to the ground node, a drain terminal coupled to the second node, and a gate terminal coupled to the second output of the amplifier;
a second transistor network comprising:
a fifth transistor having a source terminal coupled to the voltage supply node, a drain terminal coupled to a third node, and a gate terminal coupled to the third output of the amplifier;
and
a sixth transistor having a source terminal coupled to the ground node, a drain terminal coupled to the third node, and a gate terminal coupled to the fourth output of the amplifier;
a seventh transistor having a source terminal coupled to the voltage supply node, a drain terminal coupled to a fourth node, and a gate terminal coupled to the third output of the amplifier;
and
an eighth transistor having a source terminal coupled to the ground node, a drain terminal coupled to the fourth node, and a gate terminal coupled to the fourth output of the amplifier;
a first resistor coupled between the first node and the second node;
a second resistor coupled between the third node and the fourth node;
and
a third resistor coupled between the first node and the third node;
a receiver;
and
a controller coupled to the current-mode driver and the receiver.

18 more elements

Dependencies are inferred from the claim text.

Ethernet line driver

Life of this patent

Ethernet line driver

Life of this patent

Abstract

Claims18