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Stephens; Charles S.
Corvallis, OR
No. of patents:

Patent Number Title Of Patent Date Issued
6285236 Integrated circuit assembly having output pads with application specific characteristics September 4, 2001
An application specific integrated circuit, for use with a circuit having a particular electrical characteristic, e.g. ringing or impedance, has an output pad with an output transistor having a drain connected to the output pad and a gate connected to the drain of a predriver transistor.
6114895 Integrated circuit assembly having output pads with application specific characteristics and met September 5, 2000
An application specific integrated circuit for use with a circuit having particular electrical characteristic such as ringing or impedance. The circuit has an output pad with an output transistor having a drain connected to the output pad, and a gate connected to the drain of a predr
5734254 Battery pack and charging system for a portable electronic device March 31, 1998
A battery pack, adapter and integrated charging system for charging a battery pack of the type used in a portable electronic device such as a notebook computer, a cellular telephone, etc. The battery pack includes a battery coupled through a power converter to a secondary transformer
5602455 Portable battery charger with integrally attached output cable February 11, 1997
A battery charger is connected to a power source via an input cable. The battery charger has charge switching circuitry for delivering a charge to a battery under the control of a controller. The controller has state detection logic for detecting the current state of the battery, and
5506527 Low power diode April 9, 1996
A common dictionary definition of a "diode" is "any electronic device that restricts current flow chiefly to one direction." This definition covers not only the conventional two lead PN junction semiconductor device presently known in the prior art (referred to herein as a "conventional
5489835 Cell type determination of battery under charge conditions February 6, 1996
The cell type (i.e. alkaline, Ni-Cd, etc.) of a battery is determined by reference to characteristics of its electrical behavior during charging. Exemplary characteristics include the magnitude of the initial voltage rise and the rate of initial voltage rise. Depending on the outcome of
5485090 Method and apparatus for differentiating battery types January 16, 1996
The cell type of a battery is determined by characterizing the series resistance behavior of various cell types to determine ranges of series resistance values exhibited by batteries of a particular cell type. The series resistance of a battery of unknown cell type is then measured. If
5416403 Current stabilizing circuit May 16, 1995
A circuit topology useable in a battery impedance tester to latch a source current to a constant magnitude includes an inductor, a comparator, a driver and a storage capacitor. The inductor is connected in series with a current path between a source and a load. The inductor produces a vo

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