Electronic Device and Method Providing a Voltage Reference
AssigneeTexas Instruments Incorporated
InventorsVadim V. Ivanov, Johannes Gerber, Ralf Brederlow
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Abstract
An electronic device includes a bandgap reference voltage generation stage. The bandgap reference voltage generation stage comprises a device with a PN-junction, a current source feeding a first current during a first period of time and a second higher current during a second period of time through the PN-junction. The bandgap reference voltage is generated from a combination of a first voltage drop across the PN-junction during the first period of time and a second voltage drop across the PN-junction during the second period of time. This bandgap reference voltage is formed using switched capacitors.
Claims9
An electronic device having a bandgap reference voltage generation stage comprising:
- a device with a PN-junction;
- a current source operable to supply a current of a first magnitude during a first period of time and a current of a second magnitude during a second period of time through the PN-junction;
- and
- an output stage generating a voltage as the bandgap reference voltage from a combination of a first voltage drop across the PN-junction during the first period of time and a second voltage drop across the PN-junction during the second period of time.
A method of generating a bandgap reference voltage, the method comprising the steps of:
- feeding a current of a first magnitude to a PN-junction during a first period of time;
- feeding a current of a second magnitude to the PN-junction during a second period of time;
- and
- forming a voltage output for use as a bandgap reference voltage from a combination of a first voltage drop across the PN-junction caused by the first current during the first period of time and a second voltage drop across the PN-junction caused by the second current during the second period of time.
Dependencies are inferred from the claim text.