Reference current generator

Details Reference current generator Reference current generator

2008-05-20

2008-05-20

Nguyen, Matthew V (Department: 2838)

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

C323S313000, C323S314000, C323S316000

Reexamination Certificate

active

07375504

ABSTRACT:
Provided is a low-reference-current generator that includes a circuit employing two feedback loops enabling it to operate even at a low voltage, has a high power supply rejection ratio (PSRR) to control power supply noise, and simply forms a voltage without a voltage-to-current converter used in a conventional general reference current generator. The reference current generator includes: a first voltage generator receiving a predetermined current and generating a first voltage that decreases as temperature increases; a second voltage generator generating a second voltage that increases as temperature increases; a first current generator generating a first current corresponding to the first voltage; a second current generator generating a second current corresponding to the second voltage; and a reference current generator receiving the first current and the second current and generating a reference current that is the sum of the first current and the second current.

REFERENCES:
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Hironori Banba et al, “A CMOS Bandgap Reference Circuit with Sub-1-V Operation,” IEEE Journal of Solid-State Circuits, vol. 34, No. 5, May 1999, pp. 670-674.

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