Network driving circuit and method of driving network device
AssigneeRealtek Semiconductor Corp.
InventorChien-Ming Wu
Life of this patent
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Abstract
A method of driving a network device for outputting signals to a physical network transmission medium. The network device includes a DAC circuit that comprises a plurality of digital-to-analog conversion units. Each digital-to-analog conversion unit includes a first auxiliary current source and a second auxiliary current source. The method includes the steps of: detecting a length of the physical network transmission medium; generating a control signal according to the length; generating a bias signal according to the control signal; applying the bias signal to the first auxiliary current source and the second auxiliary current source to control the currents of the first auxiliary current source and the second auxiliary current source.
Claims18
A network driving circuit comprising:
- a digital-to-analog converter (DAC) circuit configured for converting a digital output signal to an analog output signal;
- a line driver circuit, coupled to said DAC circuit, configured for amplifying said analog output signal;
- a transformer circuit, coupled to said line driver circuit, for coupling said analog output signal to a physical network transmission medium;
- a control circuit, coupled to said DAC circuit, configured for generating a control signal according to a length of said physical network transmission medium;
- and
- a bias circuit, coupled to said control circuit, configured for generating a bias signal associated with said length according to said control signal;
- wherein, said DAC circuit comprises a plurality of digital-to-analog conversion units, each digital-to-analog conversion unit comprising a main current source and an auxiliary current source, and a bias voltage of said auxiliary current source is controlled by said bias signal.
A network driving circuit for outputting a signal to a physical network transmission medium, comprising:
- a digital-to-analog converter (DAC) circuit that comprises a plurality of digital-to-analog conversion units and configured to convert a digital output signal to an analog output signal, each digital-to-analog conversion unit comprising:
- a first auxiliary current source;
- and
- a second auxiliary current source;
- a transformer circuit, coupled to said DAC circuit, for coupling said analog output signal to said physical network transmission medium;
- and
- a bias circuit configured for generating a bias signal associated with a length of said physical network transmission medium to control currents of said first auxiliary current source and said second auxiliary current source.
A method of driving a network device to output a signal to a physical network transmission medium, said network device comprising a digital-to-analog converter (DAC) circuit that comprises a plurality of digital-to-analog conversion units, each digital-to-analog conversion unit comprising a first auxiliary current source and a second auxiliary current source, said method comprising:
- detecting a length of said physical network transmission medium;
- generating a control signal according to said length;
- generating a bias signal according to said control signal;
- and
- applying said bias signal to said first auxiliary current source and said second auxiliary current source to control currents of said first auxiliary current source and said second auxiliary current source.
Dependencies are inferred from the claim text.