System and method for power-efficient charging and discharging of a capacitive load from a single source
First Claim
1. A system for efficiently charging and discharging a capacitive load from a single voltage source of a first potential consisting of:
- a first switch for selectively charging the load;
a second switch for selectively discharging the load;
plural capacitive elements; and
switch means for selectively connecting each of the capacitive elements to the capacitive load to gradually charge or discharge the capacitive load.
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Abstract
A system and method for efficiently charging and discharging a capacitive load from a single voltage source. The system includes a first switch for selectively connecting the voltage source to the load and a second switch for selectively providing a short across the load as may be common in the art. A particularly novel aspect of the invention resides in the provision of plural capacitive elements and a switching mechanism for selectively connecting each of the capacitive elements to the load whereby the load is gradually charged or discharged. In the illustrative embodiment, the switching mechanism includes a set of switches for selectively connecting each of the capacitive elements to the capacitive load and a switch control mechanism for selectively activating the switches.
88 Citations
12 Claims
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1. A system for efficiently charging and discharging a capacitive load from a single voltage source of a first potential consisting of:
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a first switch for selectively charging the load;
a second switch for selectively discharging the load;
plural capacitive elements; and
switch means for selectively connecting each of the capacitive elements to the capacitive load to gradually charge or discharge the capacitive load. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for efficiently charging and discharging a capacitive load from a single voltage source including the steps of:
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providing a first switch for selectively connecting the voltage source to the load;
providing a second switch for selectively providing a short across the load;
providing plural capacitive elements;
providing plural third switches for selectively connecting each of the capacitive elements to the capacitive load; and
selectively activating the first, second and third switches to gradually charge or discharge the capacitive load.
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12. A system for charging and discharging a capacitive load comprising:
Specification