Internal reference voltage generation for integrated circuit...

Details Internal reference voltage generation for integrated circuit... Internal reference voltage generation for integrated circuit...

2007-07-24

2007-07-24

Callahan, Timothy P. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S530000

Reexamination Certificate

active

11039665

ABSTRACT:
For one or more disclosed methods, a supply voltage is supplied to an integrated circuit, the integrated circuit is placed in a test mode to select one of a plurality of reference voltage generators on the integrated circuit to supply to another voltage generator on the integrated circuit a reference voltage that is at least partially dependent on the supply voltage, and the integrated circuit is tested with the reference voltage supplied to the other voltage generator. One or more disclosed integrated circuits comprise a first voltage generator on the integrated circuit to generate a first voltage that is at least partially dependent on a supply voltage powering the integrated circuit, a second voltage generator on the integrated circuit to generate a second voltage, a third voltage generator on the integrated circuit to generate one or more internal voltages based on a reference voltage, and control circuitry to select the first voltage for use as the reference voltage in a test mode and to select the second voltage for use as the reference voltage in a non-test mode.

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