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US 9,851,740 B2Granted
Systems and methods to provide reference voltage or current
AssigneeQUALCOMM Incorporated
InventorsChao Song, Kevin Wang
Life of this patent
Estimating the term…
Abstract
A current mirroring circuit including: a first portion having a first resistor and a first transistor, the first transistor having a control terminal coupled to a control terminal of a first diode-connected transistor; and a second portion having a second resistor and a second transistor, the second transistor having a control terminal coupled to a control terminal of a second diode-connected transistor, the first portion being in electrical communication with a first power level and the second portion being in electrical communication with a second power level, the first portion being coupled to the second portion.
Claims28
A current mirroring circuit comprising:
- a first portion having a first resistor and a first transistor, the first transistor having a control terminal coupled to a control terminal of a first diode-connected transistor;
- and
- a second portion having a second resistor and a second transistor, the second transistor having a control terminal coupled to a control terminal of a second diode-connected transistor, the first portion being in electrical communication with a first power level and the second portion being in electrical communication with a second power level, the first portion being coupled to the second portion, wherein the first diode-connected transistor is included in a first diode-connected pair of transistors including an NMOS transistor and a PMOS transistor, further wherein the second diode-connected transistor is included in a second diode-connected pair of transistors including an NMOS transistor and a PMOS transistor.
A method comprising:
- mirroring a first current and a second current, wherein a path of the first current between a power source and ground includes a first resistor, a first transistor, and a first diode-connected NMOS and PMOS pair, further wherein a path of the second current between the power source and ground includes a second resistor, a second transistor, and a second diode-connected NMOS and PMOS pair, wherein mirroring includes:
- maintaining a gate of the first transistor and gates of the second diode-connected NMOS and PMOS pair at a same voltage;
- maintaining a gate of the second transistor and the first diode-connected NMOS and PMOS pair at a same voltage;
- and
- outputting a reference voltage from a node disposed between the first transistor and the first diode-connected NMOS and PMOS pair.
2 more elements
A semiconductor device comprising:
- a first current path between a power source and ground, wherein the first current path includes in series:
- a first resistor, a first transistor, and a first diode-connected NMOS and PMOS pair;
- a second current path between the power source and ground, wherein the second current path includes in series:
- a second resistor, a second transistor, and a second diode-connected NMOS and PMOS pair, wherein a control terminal of the first transistor and a control terminal of the second diode-connected NMOS and PMOS pair are coupled and wherein a control terminal of the second transistor is coupled to a control terminal of the first diode-connected NMOS and PMOS pair;
- and
- a reference voltage output terminal in communication with the first current path and disposed between the first transistor and the first diode-connected NMOS and PMOS pair.
3 more elements
A semiconductor device comprising:
- a first portion having first means for providing a nonlinear voltage drop, the first means for providing a nonlinear voltage drop including a first resistor and having a control terminal coupled to a gate terminal of second means for providing a nonlinear voltage drop, the second means for providing a nonlinear voltage drop including a first non-linear device;
- and
- a second portion having third means for providing a nonlinear voltage drop, the third means for providing a nonlinear voltage drop including a second resistor and having a control terminal coupled to a gate terminal of fourth means for providing a nonlinear voltage drop, the fourth means for providing a nonlinear voltage drop including a second non-linear device, the first portion being in electrical communication with a power supply and the second portion being in electrical communication with ground, the first portion being coupled to the second portion, wherein the first means for providing a nonlinear voltage drop includes a first transistor in series with the first resistor, wherein the first resistor is disposed between the first transistor and the power supply, and wherein the first non-linear device includes a first diode-connected NMOS and PMOS pair.
Dependencies are inferred from the claim text.