Bidirectional data link
AssigneeTexas Instruments Incorporated
InventorsAbishek Manian, Amit Rane
Life of this patent
Estimating the term…
Abstract
A bidirectional data link includes a forward channel transmitter circuit and a forward channel receiver circuit. The forward channel transmitter circuit includes a forward channel driver circuit, and a back channel receiver circuit. The back channel receiver circuit is coupled to the forward channel driver circuit. The back channel receiver circuit includes a summation circuit and an active filter circuit. The summation circuit is coupled to the forward channel driver circuit. The active filter circuit is coupled to the summation circuit. The forward channel receiver circuit includes a forward channel receiver, and a back channel driver circuit. The back channel driver circuit is coupled to the forward channel receiver.
Claims10
A bidirectional data link, comprising:
- a forward channel transmitter circuit, including:
- a forward channel driver circuit;
- and
- a back channel receiver circuit coupled to the forward channel driver circuit, the back channel receiver circuit including:
- a summation circuit coupled to the forward channel driver circuit;
- and
- an active filter circuit coupled to the summation circuit;
- and
- a forward channel receiver circuit, including:
- a forward channel receiver;
- and
- a back channel driver circuit coupled to the forward channel receiver, the back channel driver having active side transistors driving a common mode signal and dummy side transistors.
A transceiver circuit, including:
- a forward channel driver circuit comprising a differential output;
- and
- a back channel receiver circuit coupled to the differential output, the back channel receiver circuit including:
- a replica driver circuit providing a scaled replica of at least a portion of the forward channel drive circuit;
- a summation circuit;
- and
- an active filter circuit coupled to the summation circuit.
A bidirectional data link, comprising:
- a forward channel driver circuit having an input terminal coupled to a first data channel terminal, a forward channel driver positive output terminal, and a forward channel driver negative output terminal configured to be coupled to a first end of a single- ended transmission medium;
- a back channel receiver circuit having a first input coupled to the forward channel driver positive output terminal, a second input coupled to the forward channel driver negative output terminal, and generating a back channel receiver output signal at a back channel receiver output terminal, wherein the back channel receiver output signal is generated by summing the signals at the forward channel driver positive output terminal and the forward channel driver negative output terminal;
- a forward channel receiver circuit having a first input terminal configured to be coupled to a second end of the single-ended transmission medium, a second input terminal, and a forward channel receiver output terminal, wherein the signal at the forward channel receiver output terminal is the difference between the signals at the first input terminal and the second input terminal;
- a back channel driver circuit having an input terminal coupled to a second data channel terminal, a first output terminal coupled to the first input terminal of the forward channel receiver circuit, and a second output terminal coupled to the second terminal of the forward channel receiver circuit.
Dependencies are inferred from the claim text.