Clock matching tune circuit
AssigneeTexas Instruments Incorporated
InventorsGebhard Haug, Dirk Preikszat
Life of this patent
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Abstract
In an example, a system includes circuitry on a first side of an isolation barrier and circuitry on a second side of the isolation barrier, where the isolation barrier is operable to electrically isolate the first side from the second side. The system also includes a trimmed oscillator, a first transmitter, and a first receiver on the first side, the trimmed oscillator coupled to the first transmitter. The system includes a tunable oscillator, a second transmitter, and a second receiver on the second side, the tunable oscillator coupled to the second receiver and the second transmitter. In the system, the first side is configured to transmit a training sequence to the second side, and the second side is configured to tune the tunable oscillator based on the training sequence.
Claims18
A method, comprising:
- receiving a training sequence signal from a first oscillator on a first side of an isolation barrier to a receiver on a second side of the isolation barrier;
- tuning a second oscillator on the second side of the isolation barrier based on the training sequence signal;
- responsive to a frequency of the second oscillator reaching a predetermined range, transmitting a data signal from the second side to the first side of the isolation barrier;
- responsive to the first side successfully decoding the data signal, transmitting a data sequence to the second side;
- and
- responsive to the first side successfully decoding the data signal, providing a success message to a multiplexer.
A system having circuitry on a first side of an isolation barrier and circuitry on a second side of the isolation barrier, the system comprising:
- the isolation barrier operable to electrically isolate the first side from the second side;
- a trimmed oscillator, a first transmitter, and a first receiver on the first side, the trimmed oscillator coupled to the first transmitter;
- a tunable oscillator, a second transmitter, and a second receiver on the second side, the tunable oscillator coupled to the second receiver and the second transmitter;
- wherein the first side is configured to transmit a training sequence to the second side, and the second side is configured to tune the tunable oscillator based on the training sequence;
- and
- wherein the first side is configured to count a number of faults from the second side.
A method of operating a system having circuitry on a first side of an isolation barrier and circuitry on a second side of the isolation barrier, the method comprising:
- receiving data at the first side from the second side, wherein the first side includes a trimmed oscillator and the second side includes a tunable oscillator;
- counting a number of faults in the data at the first side;
- responsive to the number of faults reaching a predetermined threshold, transmitting a training sequence from the first side to the second side;
- tuning the tunable oscillator based on the training sequence;
- transmitting a data signal from the second side to the first side of the isolation barrier;
- and
- responsive to the first side successfully decoding the data signal, transmitting a data sequence to the second side.
Dependencies are inferred from the claim text.