Transmission device and communication system

Patent metadata

Field	Value
Publication number	US-9621380-B2
Application number	US-201615057422-A
Country	US
Kind code	B2
Filing date	Mar 1, 2016
Priority date	Mar 25, 2014
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

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 first selector configured to select a first output signal from one of a first signal and a second signal;
a second selector configured to select a second output signal from one of an inversion signal of the first signal, the second signal, and an inversion signal of the second 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 the first output signal and the first control signal; and
a second driver configured to set a voltage of a second output terminal, based on the second output signal and the second control signal.

2. The transmission device according to claim 1 , wherein
a plurality of operation modes including a first operation mode are provided, and
in the first operation mode,
the first selector alternately selects the first signal and the second signal,
the second selector selects the inversion signal of the first signal when the first selector selects the first signal, and selects the inversion signal of the second signal when the first selector selects the second signal,
the first driver selectively sets the voltage of the first output terminal to one of a first voltage and a second voltage, based on the first output signal, and
the second driver selectively sets the voltage of the second output terminal to one of the first voltage and the second voltage, based on the second output signal.

3. The transmission device according to claim 2 , wherein
the operation modes include a second operation mode,
in the second operation mode,
the first selector selects the first signal,
the second selector selects the second signal,
the first driver selectively sets the voltage of the first output terminal to one of the first voltage and the second voltage, based on the first output signal when the first control signal is at a first logic, and the first driver sets the voltage of the first output terminal to a third voltage when the first control signal is at a second logic, and
the second driver selectively sets the voltage of the second output terminal to one of the first voltage and the second voltage, based on the second output signal when the second control signal is at the first logic, and the second driver sets the voltage of the second output terminal to the third voltage when the second control signal is at the second logic.

4. The transmission device according to claim 2 , wherein
the operation modes include a third operation mode,
in the third operation mode,
the first selector selects the first signal,
the second selector selects the second signal,
the first driver selectively sets the voltage of the first output terminal to one of the first voltage and the second voltage, based on the first output signal, and
the second driver selectively sets the voltage of the second output terminal to one of the first voltage and the second voltage, based on the second output signal.

5. The transmission device according to claim 3 , further comprising:
a third selector configured to select a third output signal from one of the third signal and a fourth signal;
a fourth selector configured to select a fourth output signal from one of an inversion signal of the third signal, the fourth signal, and an inversion signal of the fourth signal;
a third driver configured to set a voltage of a third output terminal, based on the third output signal and the third control signal; and
a fourth driver configured to set a voltage of a fourth output terminal, based on the fourth output signal.

6. The transmission device according to claim 5 , wherein
in the first operation mode,
the third selector alternately selects the third signal and the fourth signal,
the fourth selector selects the inversion signal of the third signal when the third selector selects the third signal, and selects the inversion signal of the fourth signal when the third selector selects the fourth signal,
the third driver selectively sets the voltage of the third output terminal to one of the first voltage and the second voltage, based on the third output signal, and
the fourth driver selectively sets the voltage of the fourth output terminal to one of the first voltage and the second voltage, based on the fourth output signal.

7. The transmission device according to claim 5 , wherein
in the second operation mode,
the third selector selects the third signal, and
the third driver selectively sets the voltage of the third output terminal to one of the first voltage and the second voltage, based on the third output signal when the third control signal is at the first logic, and the third driver sets the voltage of the third output terminal to the third voltage when the third control signal is at the second logic.

8. The transmission device according to claim 5 , further comprising:
a first serializer configured to generate the first signal;
a second serializer configured to generate the second signal;
a third serializer configured to generate the third signal; and
a fourth serializer configured to generate the fourth signal.

9. The transmission device according to claim 8 , wherein order of layout of the first output terminal, the second output terminal, the third output terminal, and the fourth output terminal is different from order of layout of the first serializer, the second serializer, the third serializer, and the fourth serializer.

10. The transmission device according to claim 8 , wherein each of the serializers uses a shift register, and is configured to change number of stages to be used in accordance with the operation modes.

11. The transmission device according to claim 1 , further comprising:
a third selector configured to select a third output signal from one of the third signal and a fourth signal;
a fourth selector configured to select a fourth output signal from one of an inversion signal of the third signal, the fourth signal, and an inversion signal of the fourth signal;
a fifth selector configured to select a fifth output signal from one of a fifth signal and a sixth signal;
a sixth selector configured to select a sixth output signal from one of an inversion signal of the fifth signal, the sixth signal, and an inversion signal of the sixth signal;
a second control signal generator configured to generate a fourth control signal, a fifth control signal, and a sixth control signal, based on the fourth signal, the fifth signal, and the sixth signal;
a third driver configured to set a voltage of a third output terminal, based on the third output signal and the third control signal;
a fourth driver configured to set a voltage of a fourth output terminal, based on the fourth output signal and the fourth control signal;
a fifth driver configured to set a voltage of a fifth output terminal, based on the fifth output signal and the fifth control signal; and
a sixth driver configured to set a voltage of a sixth output terminal, based on the sixth output signal and the sixth control signal.

12. The transmission device according to claim 1 , further comprising a third driver configured to set a voltage of a third output terminal, based on the third signal and the third control signal.

13. The transmission device according to claim 1 , wherein
each of the drivers includes a plurality of driver circuits, and
each of the driver circuits includes
a first switch having one end and an other end, the one end being led to a first power

Assignees

• Sony Corp

Inventors

• Saeki Takanori

Classifications

• 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

• H04L25/0278 Primary

  Arrangements for impedance matching · CPC title

• H04L25/028

  Arrangements specific to the transmitter end · CPC title

• G06F21/602

  Providing cryptographic facilities or services · CPC title