High-speed wide-band low-power level shifter for high-speed applications
AssigneeNXP USA, Inc.
InventorsSiamak Delshadpour, Xueyang Geng, David Edward Bien
Life of this patent
Estimating the term…
Abstract
Embodiments of level shifters are disclosed. In an embodiment, a level shifter includes a transistor connected between an input terminal of the level shifter and an output terminal of the level shifter, a first resistor connected between a first terminal of the transistor and one of the input terminal of the level shifter and the output terminal of the level shifter, a capacitor connected between the input terminal of the level shifter and the output terminal of the level shifter, a current source connected between the output terminal of the level shifter and a fixed voltage, and a resistor divider connected between the first resistor and the output terminal of the level shifter.
Claims20
A level shifter comprising:
- a transistor connected between an input terminal of the level shifter and an output terminal of the level shifter;
- a first resistor connected between a first terminal of the transistor and the output terminal of the level shifter;
- a capacitor connected between the input terminal of the level shifter and the output terminal of the level shifter;
- a current source connected between the output terminal of the level shifter and a fixed voltage;
- and
- a resistor divider connected between the first resistor and the output terminal of the level shifter.
A level shifter comprising:
- a transistor connected between an input terminal of the level shifter and an output terminal of the level shifter;
- a first resistor connected between a first terminal of the transistor and the output terminal of the level shifter;
- a capacitor connected between a second terminal of the transistor and the output terminal of the level shifter, wherein the capacitor is connected to the input terminal of the level shifter;
- a current source connected between the first resistor and ground;
- and
- a resistor divider connected between the first resistor and the output terminal of the level shifter,
- wherein the transistor and the first resistor are located in a first signal path for a low-frequency component of an input signal received at the input terminal of the level shifter, and
- wherein the capacitor is located in a second signal path for a high-frequency component of the input signal received at the input terminal of the level shifter.
A differential level shifter comprising:
- a first transistor connected between a first input terminal of the differential level shifter and a first output terminal of the differential level shifter;
- a first resistor connected between a first terminal of the first transistor and the first output terminal of the differential level shifter;
- a first capacitor connected between a second terminal of the first transistor and the first output terminal of the differential level shifter, wherein the first capacitor is connected to the first input terminal of the differential level shifter;
- a first current source connected between the first resistor and ground;
- a second transistor connected between a second input terminal of the differential level shifter and a second output terminal of the differential level shifter;
- a second resistor connected between a first terminal of the second transistor and the second output terminal of the differential level shifter;
- a second capacitor connected between a second terminal of the second transistor and the second output terminal of the differential level shifter, wherein the second capacitor is connected to the second input terminal of the differential level shifter;
- a second current source connected between the second resistor and ground;
- and
- a resistor divider connected between the first resistor and the second resistor.
Dependencies are inferred from the claim text.