Switched-Mode Converter
First Claim
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1. A switched-mode converter comprising:
- a first chopper transistor;
a second chopper transistor; and
control means for;
maintaining the first and second chopper transistors respectively on and off during first operating phases;
maintaining the first and second transistors respectively off and on during second operating phases; and
applying an intermediary voltage to a gate of the second transistor during intermediary phases taking place between the first and second operating phases, the intermediary voltage being close to a threshold voltage of the second chopper transistor.
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Abstract
A switched-mode converter includes first and second chopper transistors, and control means for maintaining the first and second chopper transistors respectively on and off during first operating phases. The first and second chopper transistors are maintained respectively off and on during second operating phases. An intermediary voltage is applied to the gate of the second transistor during intermediary phases taking place between the first and second phases. This intermediary voltage is close to the threshold voltage of the second transistor.
10 Citations
40 Claims
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1. A switched-mode converter comprising:
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a first chopper transistor; a second chopper transistor; and control means for; maintaining the first and second chopper transistors respectively on and off during first operating phases; maintaining the first and second transistors respectively off and on during second operating phases; and applying an intermediary voltage to a gate of the second transistor during intermediary phases taking place between the first and second operating phases, the intermediary voltage being close to a threshold voltage of the second chopper transistor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A switched-mode converter comprising:
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a first chopper transistor; a second chopper transistor; and control circuitry configured to maintain the first chopper transistor on and the second chopper transistor off during first operating phases, to maintain the first chopper transistor off and the second chopper transistor on during second operating phases, and to apply an intermediary voltage to a control terminal of the second chopper transistor during intermediary phases that take place between the first and second operating phases, the intermediary voltage being close to a threshold voltage of the second chopper transistor. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A circuit comprising:
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a first transistor having a current path between a first source/drain region and a second source/drain region and a gate, the first source/drain region coupled to a first input terminal; a second transistor having a current path between a first source/drain region and a second source/drain region and a gate, the first source/drain region coupled to a second input terminal and the current path of the second transistor coupled in series with the current path of the first transistor; a diode-connected transistor having a current path between a first source/drain region and a second source/drain region and a gate, the second source/drain region of the diode-connected transistor being coupled to the gate of the diode-connected transistor; a current source coupled in series with the current path of the diode-connected transistor between the first input terminal and the second input terminal; a first switch coupled to the gate of the first transistor so as to connect the gate to either a gate high voltage terminal or to a gate low voltage terminal; and a second switch coupled to the gate of the second transistor so as to connect the gate to either the gate high voltage terminal or to a gate low voltage terminal or the gate of the diode-connected transistor. - View Dependent Claims (23, 24, 25, 26, 27)
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28. A circuit comprising:
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a first transistor having a current path between a first source/drain region and a second source/drain region and a gate, the first source/drain region coupled to a first input terminal; a second transistor having a current path between a first source/drain region and a second source/drain region and a gate, the first source/drain region coupled to a second input terminal and the current path of the second transistor coupled in series with the current path of the first transistor; a third transistor having a current path between a first source/drain region and a second source/drain region and a gate, the second source/drain region of the third transistor being coupled to the gate of the third transistor; a first switch coupled to the gate of the first transistor so as to connect the gate to either a gate high voltage terminal or to a gate low voltage terminal; a second switch coupled to the gate of the second transistor so as to connect the gate to either the gate high voltage terminal or to the gate low voltage terminal or the gate of the third transistor; a fourth transistor having a current path between a first source/drain region and a second source/drain region and a gate, the current path of the fourth transistor coupled in series with the current path of the third transistor; a third switch with a current path coupled in series with the current path of the third transistor and the current path of the fourth transistor; a fifth transistor having a current path between a first source/drain region and a second source/drain region and a gate, the second source/drain region of the fifth transistor being coupled to the gate of the fifth transistor and the gate of the fifth transistor being coupled to the gate of the fourth transistor; a sixth transistor having a current path between a first source/drain region and a second source/drain region and a gate, the second source/drain region of the sixth transistor being coupled to the gate of the sixth transistor; and a current source coupled in series with the current paths of the fifth transistor and the sixth transistor. - View Dependent Claims (29, 30, 31, 32, 33, 34)
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35. A method of operating a converter that comprises a first chopper transistor coupled in series with a second chopper transistor between input terminals, the method comprising:
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maintaining the first chopper transistor on and the second chopper transistor off during first operating phases; maintaining the first chopper transistor off and the second chopper transistor on during second operating phases; and applying an intermediary voltage to a gate of the second chopper transistor during intermediary phases that take place between the first and second operating phases, the intermediary voltage being close to a threshold voltage of the second chopper transistor. - View Dependent Claims (36, 37, 38, 39, 40)
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Specification