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US 2006/0215296 A1Published application
Bidirectional referenceless communication circuit
AssigneeGennum Corporation
InventorRyan Latchman
Life of this patent
Estimating the term…
Abstract
A referenceless clocking generator circuit in a bidirectional communication circuit is operable to receive a first clock signal recovered from a transmit clock and data recovery circuit and a second clock signal recovered from a received clock and data recovery circuit and compare the frequency of the second clock signal to the first clock signal to generate a referenceless clocking signal based on the comparison.
Claims20
A bidirectional communication circuit, comprising:
- a transmit clock and data recovery circuit operable to receive transmit input data, derive a first clock signal from the transmit input data, and transmit the transmit input data over a transmit channel;
- a receive clock and data recovery circuit operable to receive receive input data over a receive channel and to receive a referenceless clocking signal, derive a second clock signal from the receive input data and the refrenceless clocking signal, and reclock the receive input data to generate reclocked data;
- and
- a referenceless clocking generator circuit operable to receive the first clock signal and the second clock signal and compare the frequency of the second clock signal to the first clock signal and generate the referenceless clocking signal based on the comparison.
1 more element
A bidirectional communication method, comprising:
- receiving transmit input data for transmission over a transmit channel;
- deriving a first clock signal from the transmit input data;
- receiving receive input data;
- deriving a second clock signal from the receive input data and a referenceless clocking signal;
- and
- comparing the frequency of the second clock signal to the first clock signal and generating the referenceless clocking signal based on the comparison.
3 more elements
A bidirectional communication circuit, comprising:
- means for receiving transmit input data for transmission over a transmit channel;
- means for deriving a first clock signal from the transmit input data;
- means for receiving receive input data;
- means for deriving a second clock signal from the receive input data and a referenceless clocking signal;
- and
- means for comparing the frequency of the second clock signal to the first clock signal and for generating the referenceless clocking signal based on the comparison.
3 more elements
Dependencies are inferred from the claim text.