Resources Contact Us Home
Multiple output charge pump

Image Number 11 for United States Patent #6636104.

A single mode buck/boost charge pump has multiple outputs and is adapted to power a plurality of separate loads, such as light emitting diodes, in a highly efficient manner. The multiple outputs have different voltages. The output current or voltage of at least one of the multiple outputs is regulated by a feedback circuit. The feedback circuit provides a control signal based on a comparison of a reference voltage with a feedback voltage. The feedback voltage is proportional to an output voltage when the charge pump is configured to regulate the output voltage. Alternately, the feedback voltage is a sense voltage across a sense resistor connected in series with a load when the charge pump is configured to regulate output current provided to the load.

  Recently Added Patents
Simultaneous image distribution and archiving
Organic light emitting diode light source device
Authenticated secret sharing
Mode detection for DVB receiver
Method and apparatus for focusing electrical stimulation in the brain during electro-convulsive therapy
Near-field optical disk having surface plasmon amplification by stimulated emission of radiation
Off-line converter with digital control
  Randomly Featured Patents
Digital protractor
Surface treating agent, article and fluorinated ether compound
Sub-optimal variable length coding
Combined panlid holder and spoonrest
5-substituted ornithine derivatives
Antibiotic preparations having increased effectiveness, processes for their manufacture and method for increasing the antibiotic action of antibiotics
Method of manufacturing LED package for formation of molding member
Combined cutting tool and sharpener
Patterning device holding apparatus and application thereof
Article of furniture