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US 5,684,429 AGranted
CMOS gigabit serial link differential transmitter and receiver
AssigneeNCR Corporation
InventorsIkuo Jimmy Sanwo, Joseph Dennis Russell, Juei-Po Lin
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Abstract
A CMOS differential transmitter and matched receiver apparatus and method for transmitting data. The system uses a CMOS bias network to create low voltage swings and optimize the voltage offsets to compensate for variations caused by the manufacturing process, and thereby increase data transmission rates to approximately 1 gigabit per second.
Claims11
A CMOS differential amplifier comprising:
- current source means for supplying a current to the CMOS differential amplifier;
- current sink means for sinking the current from the CMOS differential amplifier;
- positive amplifier means, coupled to the current source means and the current sink means, for receiving a positive input signal to be transmitted and directing the current from the current source means to a positive output and sinking current from the positive output to the current sink means in relation thereto;
- negative amplifier means, coupled to the current source means and the current sink means, for receiving a negative input signal to be transmitted and directing the current from the current source means to a negative output and sinking current from the negative output to the current sink means in relation thereto, and
- biasing means, coupled to the current source means and the current sink means, for defining output voltages at the positive and negative outputs of the CMOS differential amplifier based on a digital input to the biasing means.
2 more elements
Dependencies are inferred from the claim text.