Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2008-02-08
2009-12-15
Wells, Kenneth B. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C323S313000
Reexamination Certificate
active
07633334
ABSTRACT:
Bandgap voltage reference circuitry working under a wide supply range is provided. The bandgap reference circuitry in accordance with the invention may provide an accurate reference voltage for systems with a supply voltage that may range from approximately 1.8V to approximately 5.5V. The circuitry may be designed using a standard process and standard devices without requiring the use of special low-threshold devices or deep N-well processes and may generate an internal regulated supply voltage that may remain at a substantially stable voltage level, in spite of variations in the power supply voltage. The bandgap reference circuitry may further use a voltage clamping structure to reduce leakage currents.
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Li Ying Tian
Zhang Yayue
Marvell International Ltd.
Wells Kenneth B.
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