FAST OVERVOLTAGE PROTECTION CIRCUIT WITH DIGITAL CONTROL
First Claim
Patent Images
1. An apparatus comprising:
- a receiver including a signal detection circuit;
a transmitter; and
a control circuit configured to receive an overvoltage signal from the receiver and to disable an output of the transmitter based on the overvoltage signal,wherein;
the signal detection circuit is operable in a special mode to detect an overvoltage event at an input port of the receiver, andthe control circuit is configured to disable the output of the transmitter for a programmable time period.
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Abstract
A wired communication apparatus includes a receiver, a transmitter and a control circuit. The receiver includes a signal detection circuit. The transmitter includes a number of digital-to-analog converter (DAC) cells. The control circuit can receive an overvoltage signal from the receiver and can disable an output of the transmitter based on the overvoltage signal. The signal detection circuit is operable in a special mode to detect an overvoltage event at an input port of the receiver, and the control circuit can disable the output of the transmitter for a programmable time period.
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Citations
20 Claims
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1. An apparatus comprising:
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a receiver including a signal detection circuit; a transmitter; and a control circuit configured to receive an overvoltage signal from the receiver and to disable an output of the transmitter based on the overvoltage signal, wherein; the signal detection circuit is operable in a special mode to detect an overvoltage event at an input port of the receiver, and the control circuit is configured to disable the output of the transmitter for a programmable time period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of overvoltage protection for a transceiver, the method comprising:
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receiving, at a receiver of the transceiver, one or more link pulses and signals; detecting, by the receiver, an overvoltage caused by a link pule; sending, by the receiver, an overvoltage signal to a control circuit; and controlling, by the control circuit, an output of a transmitter of the transceiver in response to the overvoltage signal. wherein; controlling the output of the transmitter comprises disabling the output of the transmitter for a programmable time period, the link pulse is receivable from the transmitter when a link between the transceiver and a far-end transceiver is not active. - View Dependent Claims (14, 15, 16, 17)
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18. A wired communication device comprising:
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a transmitter configured to transmit signals and link pulses to a far-end device; a receiver including a signal detection circuit configured to detect an overvoltage event and generate an overvoltage signal in response to detection of the overvoltage event; and a control circuit configured to disable an output of the transmitter in response to receiving the overvoltage signal, wherein; the control circuit is configured to disable the output of the transmitter for a programmable time period, and the overvoltage event is caused by a link pulse of the transmitter when a link to the far-end device is not active. - View Dependent Claims (19, 20)
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Specification