Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Patent
1998-08-18
2000-09-05
Han, Jessica
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
323281, 323316, 323314, G05F 322
Patent
active
061148431
ABSTRACT:
A voltage regulator circuit in an integrated circuit (IC) device such as a Complex Programmable Logic Device (CPLD) includes a reference voltage generator, a tuning circuit, and an output driver circuit. The reference voltage generator converts an external supply voltage provided to the IC device into a stable reference voltage. The tuning circuit converts the stable reference voltage into a desired internal supply voltage, such as the reduced voltage required by deep sub-micron transistors. The output driver circuit provides the desired internal supply voltage with sufficient current to properly power the circuits of the IC device. The tuning circuit includes an op-amp and resistive elements configured in a voltage divider configuration in the negative feedback loop of the op-amp. The output of the op-amp can be set to the desired internal supply voltage by properly sizing the resistive elements. By making at least one of the resistive elements adjustable, a variable internal supply voltage can be provided by the voltage regulator circuit.
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Koichiro Ishibashi; Katsuro Sasaki; and Hiroshi Toyoshima, "A Voltage Down Converter with Submicroampere Standby Current for Low-Power Static RAM's", IEEE Journal of Solid-State Circuits, vol. 27, No. 6, Jun. 1992, pp. 920-926.
Rakesh Patel; Wilson Wong; John Lam; Tin Lai; Tom White; and Sammy Cheung, "A 3.3-V Programmable Logi Device that Addresses Low Power Supply and Interface Trends", IEEE 1997 Custom Integrated Circuits Conference, 1997, pp. 539-542. (no month).
"The Programmable Logic Data Book 1998", available from Xilinx, Inc., 2100 Logic Drive, San Jose, CA 95124, pp. 3-5 through 3-15, Nov. 10, 1997.
Bever Patrick T.
Han Jessica
Harms Jeanette S.
Xilinx , Inc.
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