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Man Lui Phones & Addresses

  • West Point, CA
  • 62 Court Ln, Foster City, CA 94404
  • 247 Boothbay Ave, San Mateo, CA 94404
  • Millbrae, CA
  • San Francisco, CA
  • Sacramento, CA

Publications

Us Patents

Regulation Of Recovery Rates In Charge Pumps

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US Patent:
20100148856, Jun 17, 2010
Filed:
Dec 17, 2008
Appl. No.:
12/337050
Inventors:
Man Lung Lui - Santa Clara CA, US
Seungpil Lee - San Ramon CA, US
Hao Thai Nguyen - San Jose CA, US
International Classification:
G05F 1/10
US Classification:
327536
Abstract:
A method is presented of setting a frequency of a clock for a charge pump system including the clock and a charge pump. This includes setting an initial value for the frequency of the clock and, while operating the charge pump system using the clock running at the initial frequency value, determining the ramp rate of an output voltage for the charge pump during a recovery phase. The frequency of the clock is then adjusted so that the ramp rate of the output voltage for the charge pump during the recovery phase falls in a range not exceeding a predetermined maximum rate. A charge pump system is also described that includes a register having a settable value, where the charge pump clock frequency is responsive to the register value, and count and comparison circuitry is connectable to receive the pump's output voltage and the clock signal and determine from them the number of clock cycles the charge pump uses to recover from a reset value to a predetermined value.
Man See Lui from West Point, CA, age ~50 Get Report