Low noise bandgap reference apparatus
AssigneeIntel Corporation
InventorMatthias EBERLEIN
Life of this patent
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Abstract
An apparatus comprising: a first supply node; a second supply node; a first transistor coupled to the first supply node, the first transistor is to provide a first current which is complementary to absolute temperature (CTAT); a second transistor coupled to the first supply node, the second transistor is to provide a second current which is proportional to absolute temperature (PTAT); a resistive device coupled in series at a node with the first and second transistors, and coupled to the second supply node, wherein the node is to sum the CTAT and the PTAT currents.
Claims20
An apparatus comprising:
- a first supply node;
- a second supply node;
- a first transistor coupled to the first supply node, wherein the first transistor is to provide a first current which is complementary to absolute temperature (CTAT);
- a second transistor coupled to the first supply node, wherein the second transistor is to provide a second current which is proportional to absolute temperature (PTAT);
- a resistive device coupled in series at a node with the first and second transistors, and coupled to the second supply node, wherein the node is to sum the CTAT and the PTAT currents.
An apparatus comprising:
- a current mirror coupled to a first power supply node;
- a pair or bi-polar junction devices coupled to the current mirror;
- a transistor coupled to the first power supply node, the current mirror, and the pair of bi-polar junction devices such that the transistor is to be biased by a feedback electrical path comprising the current mirror and the pair or bi-polar junction devices;
- and
- a resistor coupled in series with the transistor, and to a second supply node.
An apparatus comprising:
- a first circuitry to provide a first current which is complementary to absolute temperature (CTAT);
- a second circuitry to provide a second current which is proportional to absolute temperature (PTAT);
- and
- a node to sum the first and second currents and to provide a bandgap reference voltage which is to be less than 1 V.
A system comprising:
- a memory;
- a processor coupled to the memory, the processor including a bandgap reference circuit which includes:
- a first circuitry to provide a first current which is complementary to absolute temperature (CTAT);
- a second circuitry to provide a second current which is proportional to absolute temperature (PTAT);
- and
- a node to sum the first and second currents and to provide a bandgap reference voltage;
- and
- a wireless interface to allow the processor to communicate with another device.
Dependencies are inferred from the claim text.