Line driver with an integrated termination
AssigneeIntel Corporation
InventorStephen C. Thilenius
Life of this patent
Estimating the term…
Abstract
A line driver with an integrated termination comprises a driver current mirror, a feedback resistor, and a controlled current buffer. The feedback resistor and controlled current buffer may be coupled between the output and the input of the driver current mirror. The controlled current buffer may respond to the static current flowing through the feedback resistor. In an embodiment, the controlled current buffer output a static current that is reduced compared to other line drivers.
Claims9
A line driver with an integrated termination, the line driver comprising:
- a driver current mirror having an input and an output;
- an internal resistor having a first end and a second end, the first end of the internal resistor being coupled with a bias voltage;
- a first buffer current mirror having an input and an output, the output of the first buffer current mirror being coupled with the second end of the internal resistor;
- and
- a second buffer current mirror having an input coupled with the output of the first buffer current mirror and an output coupled with the input of the driver current mirror;
- and
- a feedback resistor having a first end and a second end, the first end of the feedback resistor being coupled with the output of the driver current mirror, and the second end of the feedback resistor being coupled with the input of the first buffer current mirror.
A line driver with an integrated termination, the line driver comprising:
- a first bipolar transistor having a collector and a base coupled together;
- a second bipolar transistor having collector and a base, the base of the second bipolar transistor being coupled with the base of the first bipolar transistor;
- an internal resistor having a first end and a second end, the first end of the internal resistor being coupled with a bias voltage;
- a first buffer current mirror having an input and an output, the output of the first buffer current mirror being coupled with the second end of the internal resistor;
- and
- a second buffer current mirror having an input coupled with the output of the first buffer current mirror and an output coupled with the collector of the first bipolar transistor;
- and
- a feedback resistor having a first end and a second end, the first end of the feedback resistor being coupled with the collector of the first bipolar transistor, and the second end of the feedback resistor being coupled with the input of the first buffer current mirror.
Dependencies are inferred from the claim text.