Transmission device and communication system

Patent metadata

Field	Value
Publication number	US-11115245-B2
Application number	US-202016857522-A
Country	US
Kind code	B2
Filing date	Apr 24, 2020
Priority date	Mar 25, 2014
Publication date	Sep 7, 2021
Grant date	Sep 7, 2021

Abstract

A transmission device of the disclosure includes a first selector configured to select one of a first signal and a second signal, and output the selected signal; a second selector configured to select one of an inversion signal of the first signal, the second signal, and an inversion signal of the second signal, and output the selected signal; a first control signal generator configured to generate a first control signal, a second control signal, and a third control signal, based on the first signal, the second signal, and a third signal; a first driver configured to set a voltage of a first output terminal, based on an output signal of the first selector and the first control signal; and a second driver configured to set a voltage of a second output terminal, based on an output signal of the second selector and the second control signal.

First claim

The invention claimed is:

1. A transmission device comprising:
a transmitter including:
a controller that selects one of a plurality of operation modes including a first operation mode transmitting data by means of differential signals and a second operation mode transmitting data by means of three-phase signals and generates control signals according to the selected mode;
a plurality of output terminals, wherein the plurality of output terminals are divided into at least one group based on the selected mode, and voltages of output terminals in each group are set based on the control signals, respectively; and
wherein the controller operates so that in the first operation mode, each group includes two output terminals that are a first output terminal and a second output terminal, and
voltages of two output terminals are configured to constitute a differential signal, and
in the second operation mode, each group includes three output terminals that are the first output terminal and the second output terminal and a third output terminal, and voltages of three output terminals are configured to constitute a three-phase signal.

2. The transmission device to claim 1 , wherein the transmitter further comprises
a first selector that selects one of a plurality of signals having a first signal according to control signals from the controller; and
a second selector that selects one of a plurality of signals having an inversion signal of the first signal and a second signal according to control signals from the controller.

3. The transmission device according to claim 2 , wherein
the controller operates so that in the first operation mode, the second selector selects the inversion signal of the first signal when the first selector selects the first signal and in the second operation mode, the second selector selects the second signal.

4. The transmission device according to claim 3 , wherein
the controller operates so that in second operation mode, voltages of three output terminals including a voltage of the first output terminal and a voltage of the second output terminal and a voltage of the third output terminal are set to voltage levels different from one another.

5. The transmission device according to claim 4 , wherein
the controller operates so that voltages of three out terminals including a voltage of the first output terminal, a voltage of the second output terminal, and a voltage of the third output terminal are set to a high-level voltage, a low-level voltage, and a medium-level voltage different from one another.

6. The transmission device according to claim 2 , wherein
the first selector selects and outputs one of a plurality of signals further having the second signal according to control signals from the controller.

7. The transmission device according to claim 2 , wherein
control signals from the controller includes a first control signal and a second control signal,
the first selector selects according to the first control signal, and
the second selector selects according to the second control signal.

8. The transmission device according to claim 7 , wherein
the first driver has a first driver circuit coupled to the first output terminal and a first driver controller generating to a signal input to the first driver circuit and
the second driver has a second driver circuit coupled to the second output circuit and a second driver controller generating to a signal input to the second driver circuit.

9. The transmission device according to claim 1 , wherein
the output terminals in the each group in the first operation mode are disposed adjacent to each other.

10. The transmission device according to claim 1 , wherein
the controller operates so that a voltages of three out terminals including a voltage of the first output terminal, a voltage of the second output terminal, and a voltage of the third output terminal constitute a three-phase signal.

11. The transmission device according to claim 1 , wherein
the transmitter further includes
a first driver setting the voltage of the first output terminal, and
a second driver setting the voltage of the second output terminal.

12. The transmission device according to claim 11 , wherein
the first driver sets the voltage of the first output terminal based on a third control signal, and
the second driver sets the voltage of the second output terminal based on a fourth signal.

13. The transmission device to claim 12 , further comprising:
a first selector that selects one of a plurality of signals having a first signal according to control signals from the controller; and
a second selector that selects one of a plurality of signals having an inversion signal of the first signal and a second signal according to control signals from the controller, wherein
the first driver controller generates to a signal input to the first driver circuit based on a signal output from the first selector
the second driver controller generates to a signal input to the second driver circuit based on a signal output from the second selector.

14. The transmission device according to claim 12 , wherein
the first driver circuit has a first transistor, a second transistor, a first resistor and a second resistor.

15. The transmission device according to claim 14 , wherein
a gate of the first transistor corresponds to the positive input terminal of the first driver circuit,
a source of the first transistor is coupled to one end of the first resistor

and
a gate of the second transistor corresponds to the negative input terminal of the first driver circuit.

16. The transmission device according to claim 1 , wherein the transmitter comprises a plurality of serializers, and wherein in the first operation mode, a serializer, which is corresponding to output terminals in one group and in the plurality of serializers, output a positive signal and a negative signal to the first output terminal and the second output terminal which is adjacent to the first output terminal respectively to constitute a differential signal; and
in the second operation mode, three serializers, which are corresponding to output terminals in one group and in the plurality of serializers, output signals to the first terminal and the second terminal and the third terminal to constitute a three-phase signal.

17. The transmission device according to claim 16 , wherein the transmitter comprises a plurality of selectors corresponding to the plurality of output terminals respectively, and each of the plurality of selectors selects, based on the control signals, one from output signals, which are from one or more serializers corresponding to the output terminals in one group.

18. The transmission device according to claim 17 , wherein the transmitter comprises a plurality of drivers, each of the plurality of drivers
comprises:
driver controller configured to generate driving control signal based on the control signals;
a plurality of driver circuits connect to one of the plurality of output terminals, wherein the driver circuits generate a high-level voltage, a low-level voltage, or a medium-level voltage based on the driving control signal.

19. The transmission device according to claim 18 , wherein in the first operation mode and the second operation mode, each of the plurality of driver circuits comprises:
a first transistor of which the gate is connected to the driver controller;
a first resistor connected to the first transistor,
a second transistor of which the gate is connected to

Assignees

• Sony Corp

Inventors

• Saeki Takanori

Classifications

• H04L25/028

  Arrangements specific to the transmitter end · CPC title

• H04L25/0278 Primary

  Arrangements for impedance matching · CPC title

• H03M9/00

  Parallel/series conversion or vice versa (digital stores in which the information is moved stepwise per se G11C19/00) · CPC title

• H04L25/0272

  Arrangements for coupling to multiple lines, e.g. for differential transmission · CPC title

• G06F21/602

  Providing cryptographic facilities or services · CPC title