US Patent No: 8,207,722

Number of patents in Portfolio can not be more than 2000

DC/DC converter




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A boost DC/DC converter has a voltage dividing circuit connected between the output terminal and the ground, that outputs a divided voltage obtained by dividing the output voltage; a reference voltage generating circuit that generates a reference voltage based on the input voltage; an error amplifier that outputs a first signal corresponding to the difference between the divided voltage and the reference voltage; a feedforward circuit that detects the input voltage and outputs a second signal corresponding to a current inversely proportional to the input voltage; a multiplier that multiples the first signal by the second signal and outputs a third signal obtained; and a control circuit that outputs, based on the third signal, a control signal for controlling on/off of the switching transistor so that the divided voltage is equal to the reference voltage.

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Inventor Name Address # of filed Patents Total Citations
Otsuka, Masafumi Kawasaki, JP 8 12
Tanifuji, Ryo Fujisawa, JP 4 18
Tokai, Yoichi Tokyo, JP 23 204

Cited Art Landscape

Patent Info (Count) # Cites Year
Lambda Americas Inc. (1)
* 2006/0043,942 Power converter apparatus and methods using output current feedforward control 7 2005
* 2008/0122,422 Parallel Current Mode Control Using a Direct Duty Cycle Algorithm with Low Computational Requirements to Perform Power Factor Correction 13 2007
* 5,708,356 Apparatus for supplying stabilized power to a load having voltage-current characteristics exhibiting partial negative resistance 6 1996
* 5,949,229 Power factor correction circuit having an error signal multiplied by a current signal 45 1997
* Cited By Examiner

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