Output driving circuit
AssigneeRealtek Semiconductor Corp.
InventorYi-Lin Chen
Life of this patent
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Abstract
Disclosed is an output driver, which comprises: a resistance element with resistance, coupled to an output terminal; a current mode driving circuit, coupled to the resistance element, for providing a first current to the output terminal, wherein at least one of the amount of the first current and the resistance of the resistance element is adjusted according to a control signal; and a control circuit for generating the control signal according to a mode signal, wherein the mode signal corresponds to at least two technology standards.
Claims20
An output driver for generating an output signal according to an input data signal to an output terminal, the output driver comprising:
- a resistance element, coupled to the output terminal, having a resistance;
- a current mode driving circuit, coupled to the resistance element and the output terminal, for providing a first current to the resistance element, wherein a voltage level of the output signal corresponds to the current amount of the first current;
- and
- a control circuit, coupled to the current mode driving circuit, for generating a control signal according to a mode signal and the input data signal to adjust at least one of the resistance of the resistance element and the first current, wherein the mode signal corresponds to at least two technical specifications, and a voltage level, a slew rate or both of the output signal is associated with the mode signal.
A method for outputting a driving current, and the method comprising:
- providing a resistance element, wherein the resistance element is coupled to an output terminal;
- providing a first current to the output terminal to form an output signal corresponding to the first current;
- providing a control signal according to a mode signal and an input data signal, wherein the mode signal corresponds to at least two technical specifications, and a voltage level, a slew rate or both of the output signal is associated with the mode signal;
- and
- adjusting at least one of the resistance of the resistance element and the first current according to the control signal to adjust the output signal such that the waveform of the output signal matches one of the at least two technical specifications.
Dependencies are inferred from the claim text.