EQUALIZING TRANSMITTER AND METHOD OF OPERATION
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Abstract
A transmitter for providing channel equalization that includes a first driver and second driver having a high pass filter. The first driver generates a first output signal representing a digital input signal. The second driver generates a second output signal representing a high pass filtered version of the digital input signal. The first and second output signals are summed to provide a third output signal that is channel equalized for transmission over a channel.
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Citations
68 Claims
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1-44. -44. (canceled)
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45. A transmitter comprising:
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a first driver to generate a first signal representing a digital input signal; and a second driver having at least one high pass filter to generate a second signal representing a high pass filtered version of the digital input signal, the second signal including a spike corresponding to each transition of the digital input signal, each spike in the second signal having a rapid rise or fall from a zero signal level followed by a gradual decay to the zero signal level, the first and second signals being combined to produce an output signal. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57)
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58. A transmitter comprising:
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a driver to generate a first signal representing a digital input signal; and a passive high-pass network having a high-frequency gain and a DC gain, wherein the passive high-pass network is adapted to receive the digital input signal and to generate a second signal having a spike corresponding to each transition in the digital input signal, the transmitter being configured to combine the first and the second signals to form an output signal. - View Dependent Claims (59, 60, 61, 62, 63)
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64. A method comprising:
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generating a first signal representing a digital input signal; generating a second signal representing a high pass filtered version of the digital input signal, the second signal including a spike corresponding to each transition of the digital input signal, each spike in the second signal having a rapid rise or fall from a zero signal level followed by a gradual decay to the zero signal level; combining the first and second signals to produce an output signal; and sending the output signal along a signal path to a receiver. - View Dependent Claims (65, 66)
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67. A method of data transmission comprising the steps of accepting a digital input signal having a plurality of discrete values corresponding to respective ones of a plurality of successive time intervals, and transmitting an output signal having a signal parameter which varies substantially as a combination of:
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a first function having one of a plurality of discrete values for each one of a series of data intervals, respective ones of the plurality of discrete values representing respective ones of the plurality of digital values; and a second function corresponding to a high-pass filtered version of the first function, the second function including a pulse corresponding to each transition in the first function, each pulse including a sharp change from a steady state value of the second function followed by a gradual decay toward the steady state value that follows, at least approximately, an exponential decay pattern.
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68. A transmitter comprising:
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first driver means for generating a first signal representing a digital input signal; second driver means for generating a second signal substantially corresponding to a high pass filtered version of the digital input signal, the second signal including a spike corresponding to each transition of the digital input signal, each spike in the second signal having a rapid rise or fall from a zero signal level followed by a gradual decay to the zero signal level; and means for combining the first and second signals to produce an output signal.
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Specification