Current reference circuit
AssigneeNXP USA, Inc.
InventorThierry Michel Alain Sicard
Life of this patent
Estimating the term…
Abstract
A current reference circuit, comprises a main resistor, comprising: a first force contact terminal at a first end of the main resistor and coupled to a first metal-oxide-semiconductor (MOS) component; a second force contact terminal at a second end of the main resistor and coupled to a second MOS component; a first sense contact terminal coupled to one bipolar junction transistor (BJT); and a second sense contact terminal opposite the first sense contact by a length of the main resistor and coupled to another bipolar junction transistor, wherein the first and second sense contact terminals exchange a current reference independently of the first and second force contact terminals.
Claims20
A current reference circuit, comprising:
- a main resistor comprising a poly resistor, the main resistor comprising:
- a first force contact terminal at a first end of the main resistor and coupled to a first metal-oxide-semiconductor (MOS) component;
- a second force contact terminal at a second end of the main resistor and coupled to a second MOS component;
- a first sense contact terminal coupled to one bipolar junction transistor (BJT);
- a second sense contact terminal opposite the first sense contact terminal by a length of the main resistor and coupled to another bipolar junction transistor, wherein the first and second sense contact terminals exchange a current reference independently of the first and second force contact terminals;
- and
- a resistor arrangement configured to provide a resistance ratio, the resistor arrangement including a first poly resistor and a second poly resistor.
A battery management system, comprising:
- a current reference circuit, comprising:
- a main resistor comprising a poly resistor, the main resistor comprising:
- a first force contact terminal at a first end of the main resistor and coupled to a first metal-oxide-semiconductor (MOS) component;
- a second force contact terminal at a second end of the main resistor and coupled to a second MOS component;
- a first sense contact terminal coupled to one bipolar junction transistor (BJT);
- and
- a second sense contact terminal opposite the first sense contact terminal by a length of the main resistor and coupled to another bipolar junction transistor, wherein the first and second sense contact terminals exchange a current reference independently of the first and second force contact terminals;
- and
- a resistor arrangement configured to provide a resistance ratio, the resistor arrangement including a first poly resistor and a second poly resistor.
A current reference circuit, comprising:
- a main resistor, comprising:
- a first force contact terminal at a first end of the main resistor;
- a second force contact terminal at a second end of the main resistor;
- a first sense contact terminal coupled to one bipolar junction transistor (BJT);
- and
- a second sense contact terminal opposite the first sense contact terminal by a length of the main resistor and coupled to another bipolar junction transistor;
- and
- a resistor arrangement that provides a resistance ratio, comprising:
- a first poly resistor and a second poly resistor, each of the first and second poly resistors comprising:
- a first force contact terminal;
- a second force contact terminal;
- a first sense contact terminal;
- and
- a second sense contact terminal, wherein the current reference circuit generates a sub-bandgap voltage that has a temperature coefficient adjusted by a ratio of a length of the first poly resistor defined by the first and second contact terminals of the first poly resistor and a length of the second poly resistor defined by the first and second contact terminals of the second poly resistor.
Dependencies are inferred from the claim text.