Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2007-02-20
2007-02-20
Laxton, Gary L (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
C323S266000, C323S268000, C323S282000, C327S536000, C363S060000
Reexamination Certificate
active
11402730
ABSTRACT:
A voltage regulator for supplying two types of loads on a common chip, namely a high current load and a low current load. The voltage regulator employs a feedback loop to supply the low current load with a fine degree of regulation and a feed forward arrangement to supply the high current load with a coarse degree of regulation. The feedback loop employs a bandgap reference source feeding a comparator, with an output driver transistor drawing current from a common supply and having an output electrode connected to a voltage divider, allowing a sample of the output to be fed back to the comparator to maintain the desired output voltage. The output electrode also feeds a control transistor for the feed forward arrangement that also draws current from the common supply and supplies the high current load directly. An example of a single chip circuit employing the present invention is a charge pump where the high current load is a series of large capacitors used to multiply charge to produce a high voltage and the low current load is a plurality of clock circuits that apply timing pulses to switches for proper phasing of the capacitors and associated switches to achieve the desired high voltage.
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P. Cappelletti et al., Flash Memories, Kluwer Academic Publishers, 1999, pp. 332-335. (6 pgs.)
Atmel Corporation
Laxton Gary L
Schneck Thomas
Schneck & Schneck
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