Bidirectional communication circuit, system and method for bidirectional communication
AssigneeAptiv Technologies AG
InventorWojciech Typrowicz
Life of this patent
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Abstract
Communication circuit for bidirectional communication. A switching part is provided including a first BJT having a first base, a first collector, and a first emitter connected to an IO line. The first BJT is activated in response to an input data signal. A transmitter part is provided including a second BJT having a second base connected to the first collector, and a second collector connected to an output. A receiver part is provided comprising a third BJT having a third base connected to an input, and a third collector connected to the first base and to the IO line. A diode is provided in the IO line for impeding current associated with an input data signal and conducting a current associated with an output data signal.
Claims20
A communication circuit for bidirectional communication with a corresponding second communication circuit, the communication circuit comprising:
- an IO line for connection to a communicating device;
- a switching part comprising a first bipolar junction transistor, BJT, having a first base, a first collector, and a first emitter connected to the IO line at a first position, wherein the switching part is configured to activate the first BJT in response to an input data signal on the IO line;
- a transmitter part comprising a second BJT having a second base connected to the first collector and a second collector connected to an output for outputting a data signal to the second communication circuit when the second BJT is activated by the first BJT;
- a receiver part comprising a third BJT having a third base connected to an input for receiving a data signal from the second communication circuit and a third collector connected to the first base and to the IO line at a second position for generating an output data signal in the IO line, and
- wherein the first and third BJTs are one of NPN BJTs and PNP BJTs, and the second BJT is the other of the NPN BJT and PNP BJT, and
- wherein the switching part further comprises a diode in the IO line between the first and second positions for impeding current associated with an input data signal in the IO line and conducting a current associated with an output data signal in the IO line when the third BJT is activated.
A communication system comprising:
- a first communicator circuit configured for bidirectional communication with a second communicator circuit, the first communicator circuit and the second communicator circuit each comprising:
- an IO line for receiving an input data signal from a communication device;
- a switching part comprising a first bipolar junction transistor, BJT, having a first base, a first collector, and a first emitter connected to the IO line at a first position, wherein the switching part is configured to activate the first BJT in response to the input data signal on the IO line;
- a transmitter part comprising a second BJT having a second base connected to the first collector and a second collector connected to an output for outputting a data signal to the second communication circuit when the second BJT is activated by the first BJT;
- a receiver part comprising a third BJT having a third base connected to an input for receiving a data signal from the second communication circuit and a third collector connected to the first base and to the IO line at a second position for generating an output data signal in the IO line, and
- wherein the first and third BJTs are one of NPN BJTs and PNP BJTs, and the second BJT is the other of the NPN BJT and PNP BJT, and
- wherein the switching part further comprises a diode in the IO line between the first and second positions for impeding current associated with an input data signal in the IO line and conducting a current associated with an output data signal in the IO line when the third BJT is activated.
A method for bidirectional communication between a communication circuit and a corresponding second communication circuit, the method comprising:
- receiving an input data signal on an IO line from a communicating device;
- providing a switching part comprising a first bipolar junction transistor, BJT, having a first base, a first collector, and a first emitter connected to the IO line at a first position;
- configuring the switching part to activate the first BJT in response to an input data signal on the IO line;
- connecting, in a transmitter part, a second base of a second BJT to the first collector for activating the second BJT when the first BJT is activated;
- connecting a second collector of the second BJT to an output for outputting a data signal to the second communication circuit when the second BJT is activated;
- providing a receiver part comprising a third BJT having a third base connected to an input and a third collector connected to the first base and to the IO line at a second position;
- and
- receiving a data signal from the second communication circuit at the input for activating the third BJT for generating an output data signal in the IO line,
- wherein the first and third BJTs are one of NPN BJTs and PNP BJTs, and the second BJT is the other of the NPN BJT and PNP BJT, and
- wherein the switching part further comprises a diode in the IO line between the first and second positions for impeding current associated with an input data signal in the IO line and conducting a current associated with an output data signal in the IO line when the third BJT is activated.
Dependencies are inferred from the claim text.