Electricity: power supply or regulation systems – In shunt with source or load – Using choke and switch across source
Reexamination Certificate
2007-02-20
2007-02-20
Sterrett, Jeffrey (Department: 2838)
Electricity: power supply or regulation systems
In shunt with source or load
Using choke and switch across source
C323S271000, C323S284000
Reexamination Certificate
active
10905018
ABSTRACT:
A switching circuit operates with a first operating state and a second operating state. During the first operating state, the switching circuit allows a switching current to linearly increase. During the second operating state, the switching circuit allows the switching current to linearly decrease. A control circuit is coupled to the switching circuit for controlling the switching circuit to operate with the first operating state or the second operating state. A setting circuit generates a threshold signal for the control circuit to ensure that during the first operating state the switching current linearly increases to become higher than or equal to a current value set by the threshold signal. Thereby, the switching current is prevented from linearly decreasing to reverse polarity during the second operating state.
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“High-Efficiency, SOT23 Step-Down, DC—DC Converter”, p. 1-18, SLVS417A-Mar. 2002 Revised Mar. 2002, Texas Instruments.
Chen Tien-Tzu
Tzeng Guang-Nan
Aimtron Technology Corp.
Hsu Winston
Sterrett Jeffrey
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