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US 2025/0224754 A1Published application
Bandgap circuit
AssigneesSTMicroelectronics (Grenoble 2) SAS, STMicroelectronics (Alps) SAS
InventorsVratislav MICHAL, Regis ROUSSET
Life of this patent
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Abstract
A band-gap circuit for generating a bandgap reference signal includes a first bipolar transistor and a second bipolar transistor of a same type among PNP and NPN types. The first and second bipolar transistors are configured to generate a current varying proportionally with the temperature. A capacitor is connected between a base and an emitter of one or both of the first and second bipolar transistors.
Claims15
A circuit, comprising:
- a band-gap circuit for generating a bandgap reference signal, comprising:
- a first NPN bipolar transistor;
- a second NPN bipolar transistor;
- wherein an emitter of the first NPN bipolar transistor is coupled to a supply node;
- a first resistor coupled between a base of the first NPN bipolar transistor and the supply node;
- a second resistor coupled between an emitter of the second NPN bipolar transistor and the supply node;
- where a base of the second NPN bipolar transistor is coupled to a collector of the first NPN bipolar transistor;
- and
- a third resistor having a first terminal directly connected to the base of the first NPN bipolar transistor and a second terminal directly connected to the base of the second NPN bipolar transistor;
- wherein the first and second NPN bipolar transistors are configured to generate a current varying proportionally with temperature;
- and
- a first capacitor having a first and second terminals connected, respectively, to the base and the emitter of one of the first and second NPN bipolar transistors.
9 more elements
A circuit, comprising:
- a band-gap circuit for generating a bandgap reference signal, comprising:
- a first NPN bipolar transistor;
- a second NPN bipolar transistor;
- wherein an emitter of the first NPN bipolar transistor is coupled to a supply node;
- a first resistor coupled between a base of the first NPN bipolar transistor and the supply node;
- a second resistor coupled between an emitter of the second NPN bipolar transistor and the supply node;
- where a base of the second NPN bipolar transistor is coupled to a collector of the first NPN bipolar transistor;
- and
- a third resistor having a first terminal directly connected to the base of the first NPN bipolar transistor and a second terminal directly connected to the base of the second NPN bipolar transistor;
- wherein the first and second NPN bipolar transistors are configured to generate a current varying proportionally with temperature;
- and
- a first capacitor connected between the base and the emitter of one of the first and second NPN bipolar transistors;
- and
- a second capacitor connected between the base and the emitter of the other of the first and second NPN bipolar transistors.
11 more elements
Dependencies are inferred from the claim text.