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US 10,707,757 B2Granted
Reference voltage generator with adaptive voltage and power circuit
AssigneeAudiowise Technology Inc.
InventorLien-Sheng Wei
Life of this patent
Estimating the term…
Abstract
There is provided a reference voltage generator for providing an adaptive voltage. The reference voltage generator includes a steady current source and a PMOS transistor and an NMOS transistor cascaded to each other. A reference voltage provided by the reference voltage generator is determined by gate-source voltages of the PMOS transistor and the NMOS transistor. As said gate-source voltages vary with the temperature and manufacturing process, the reference voltage forms a self-adaptive voltage.
Claims17
A reference voltage generator, comprising:
- a steady current source configured to provide a steady current;
- a PMOS transistor, a source electrode of the PMOS transistor being configured to receive the steady current, wherein the PMOS transistor has a first gate-source voltage;
- and
- an NMOS transistor, a drain electrode of the NMOS transistor being electrically connected to a drain electrode of the PMOS transistor at a node, wherein the NMOS transistor has a second gate-source voltage,
- wherein a reference voltage provided by the reference voltage generator is outputted at the source electrode of the PMOS transistor, and determined by the first gate-source voltage and the second gate-source voltage,
- the first gate-source voltage and the second gate-source voltage self-adjust with temperature and manufacturing process to cause the reference voltage to automatically vary with the temperature and the manufacturing process, and
- gate electrodes of the PMOS transistor and the NMOS transistor are connected to the node such that the drain and gate electrodes of the PMOS transistor and the drain and gate electrodes of the NMOS transistor are connected together.
4 more elements
A reference voltage generator, comprising:
- a PMOS transistor having a first gate-source voltage;
- an NMOS transistor, a drain electrode of the NMOS transistor being electrically connected to a drain electrode of the PMOS transistor at a node, wherein the NMOS transistor has a second gate-source voltage;
- and
- a steady current source configured to provide a steady current flowing out from a source electrode of the NMOS transistor,
- wherein a reference voltage provided by the reference voltage generator is outputted at the source electrode of the NMOS transistor, and determined by the first gate-source voltage and the second gate-source voltage,
- the first gate-source voltage and the second gate-source voltage self-adjust with temperature and manufacturing process to cause the reference voltage to automatically vary with the temperature and the manufacturing process, and
- gate electrodes of the PMOS transistor and the NMOS transistor are connected to the node such that the drain and gate electrodes of the PMOS transistor and the drain and gate electrodes of the NMOS transistor are connected together.
4 more elements
A power circuit, comprising:
- a reference voltage generator comprising a steady current source, a PMOS transistor and an NMOS transistor cascadely coupled to one another, wherein the PMOS transistor has a first gate-source voltage, the NMOS transistor has a second gate-source voltage, and the reference voltage generator is configured to provide a reference voltage which is determined by the first gate-source voltage and the second gate-source voltage;
- and
- a regulator configured to receive the reference voltage and generate an adaptive voltage, wherein
- the first gate-source voltage and the second gate-source voltage self-adjust with temperature and manufacturing process to cause the reference voltage to automatically vary with the temperature and the manufacturing process.
1 more element
Dependencies are inferred from the claim text.