Systems and methods of bidirectional communication across an isolation barrier
First Claim
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1. A bi-directional isolation system for providing an isolated communication channel for a source data signal synchronized by a source clock signal, comprising:
- a bi-directional isolation barrier;
a source interface circuit coupled on one side of the isolation barrier and configured to multiplex the source clock signal on the source data signal and to transmit the multiplex signal across the isolation barrier; and
an isolated interface circuit coupled on an opposite side of the isolation barrier and configured to generate from the multiplex signal a recovered data signal and a recovered clock signal synchronized with the source clock signal.
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Abstract
A bi-directional isolation scheme is described in which digital data, including clock information, may be communicated bi-directionally across a single isolation barrier without requiring a phase locked loop (PLL) based clock recovery procedure. In this way, the lead-time needed by the receiving circuit to recover the data clock signal may be reduced and the polarity (or 180° phase) ambiguities often associated with PLL-based methods may be avoided.
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Citations
22 Claims
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1. A bi-directional isolation system for providing an isolated communication channel for a source data signal synchronized by a source clock signal, comprising:
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a bi-directional isolation barrier;
a source interface circuit coupled on one side of the isolation barrier and configured to multiplex the source clock signal on the source data signal and to transmit the multiplex signal across the isolation barrier; and
an isolated interface circuit coupled on an opposite side of the isolation barrier and configured to generate from the multiplex signal a recovered data signal and a recovered clock signal synchronized with the source clock signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A bi-directional isolation method for providing an isolated communication channel across a bi-directional isolation barrier for a source data signal synchronized by a source clock signal, comprising:
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on one side of the isolation barrier, multiplexing the source clock signal on the source data signal and transmitting the multiplex signal across the isolation barrier; and
on an opposite side of the isolation barrier, generating from the multiplex signal a recovered data signal and a recovered clock signal synchronized with the source clock signal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification