| US 7,583,067 B2 | ||
| Variable power output regulator | ||
| Marian Niculae, San Jose, Calif. (US); and Constantin Bucur, Santa Clara, Calif. (US) | ||
| Assigned to O2Mcro International Limited, Georgetown, Grand Cayman (Cayman Islands) | ||
| Filed on Aug. 22, 2006, as Appl. No. 11/466,291. | ||
| Application 11/466291 is a continuation of application No. 11/094983, filed on Mar. 31, 2005, granted, now 7,095,217, filed on Aug. 22, 2006. | ||
| Prior Publication US 2006/0279264 A1, Dec. 14, 2006 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. G05F 1/00 (2006.01) | ||
| U.S. Cl. 323—274 | 17 Claims |
| 1. Power control circuitry for controlling a variable output power source, said power control circuitry comprising:
a first comparator configured to compare a signal representative of an output current level of said variable output power
source with a threshold current level and provide a first output signal in response to said comparison;
threshold current input circuitry configured to provide said threshold current level to said first comparator, said threshold
current level comprising a linearly variable threshold current level having a slope that decreases with increasing voltage
over a first range of output voltage values extending between a first fixed voltage and a second fixed voltage where said
second fixed voltage is greater than said first fixed voltage level; and
power limiting control circuitry configured to provide a control signal to said variable output DC power source in response
to said first output signal from said first comparator.
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