Bandgap reference circuit
The field of the present invention is related to integrated circuit reference voltage generator circuits and more particularly to bandgap voltage generator circuits. A bandgap reference circuit includes a current-voltage mirror circuit having first, second, third, and fourth nodes, a transistor havi...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | The field of the present invention is related to integrated circuit reference voltage generator circuits and more particularly to bandgap voltage generator circuits.
A bandgap reference circuit includes a current-voltage mirror circuit having first, second, third, and fourth nodes, a transistor having a current path coupled between a source of supply voltage and the first node, a current mirror portion having an input coupled to the first node and a control terminal coupled to the fourth node, a serially coupled first resistor and first diode coupled between the output of the current mirror portion and ground, a serially coupled second resistor and second diode coupled between the third node and ground, a third diode coupled between the second node and ground, and a differential amplifier having a first input coupled to the fourth node, a second input coupled to the output of the current mirror portion for generating a bandgap reference voltage, and an output coupled to the gate of the transistor. |
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