Method and apparatus for modifying right half-plane zero in...

Details Method and apparatus for modifying right half-plane zero in... Method and apparatus for modifying right half-plane zero in...

2011-07-12

2011-07-12

Nguyen, Matthew (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S222000

Reexamination Certificate

active

07977928

ABSTRACT:
A method to generate a substantially DC output having a voltage level different than a DC input, constituted of receiving a feedback signal representing at least one of the voltage level and the current level of the generated substantially DC output; relatively emphasizing the high frequency portion of the feedback signal; controlling the buck function of a cascaded buck-boost converter with a first switching signal having a first duty cycle, the first duty cycle being a first function of the received feedback signal responsive to said relatively emphasized high frequency portion; and controlling the boost function with a second switching signal having a second duty cycle, the second duty cycle being a second function of the received feedback signal, wherein the first switching signal and the second switching signal are continuously enabled to facilitate a continuous conduction mode.

REFERENCES:
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patent: 6348781 (2002-02-01), Midya et al.
patent: 6744647 (2004-06-01), Cohen
patent: 6788033 (2004-09-01), Vinclarelli
patent: 7298125 (2007-11-01), Ritter
patent: 7777457 (2010-08-01), Haiplik
patent: 2010/0231272 (2010-09-01), Chen et al.

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