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 lad 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.
0 Assignments
0 Petitions
Accused Products
Abstract
A system and method for efficiently charging and discharging a capacitive load from a single voltage source. The system includes a brat switch for selectively connecting the voltage source to the load and a second switch for selectively providing a short across the load as may he 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.
21 Citations
80 Claims
-
1. A system for efficiently charging and discharging a capacitive lad 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method for efficiently charging and discharging a capacitive load from a single voltage source including the steps of:
-
providing a flat 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.
-
-
12. An apparatus for driving a capacitive load, comprising:
-
a voltage source; and
a switch network, wherein the switch network is operable to electrically connect the capacitive load and the voltage source to drive the load to a first voltage level, wherein the switch network is further operable to electrically connect the capacitive load and a capacitive storage system, and wherein when the capacitive storage system and the capacitive load are electrically connected by the switch network, a voltage level of the capacitive storage system tends to self stabilize to a second voltage level; and
wherein the switch network is further operable to cause charge to be transferred from the capacitive storage subsystem to the capacitive load and is still further operable to cause charge to be transferred from the capacitive load to the capacitive storage subsystem. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
-
-
24. An apparatus comprising:
-
a capacitive load;
a voltage source;
a switch network; and
a capacitive storage system, wherein the switch network is operable to electrically connect the capacitive load and the voltage source to drive the load to a first voltage level, wherein the switch network is further operable to electrically connect the capacitive load and the capacitive storage system, and wherein when the capacitive storage system and the capacitive load are electrically connected by the switch network, a voltage level of the capacitive storage system tends to self stabilize to a second voltage level, and wherein the switch network is further operable to cause charge to be transferred from the capacitive storage subsystem to the capacitive load and is still further operable to cause charge to be transferred from the capacitive load to the capacitive storage subsystem. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
-
-
35. An apparatus for driving a capacitive load, comprising:
-
a voltage source; and
a switch network, wherein the switch network is operable to electrically connect the capacitive load and the voltage source to drive the load to a first voltage level, wherein the switch network is further operable to electrically connect the capacitive load and a capacitive storage system, and wherein when the capacitive storage system and the capacitive load are electrically connected by the switch network, the capacitive storage system is electrically isolated from the voltage source, and wherein the switch network is further operable to cause charge to be transferred from the capacitive storage subsystem to the capacitive load and is still further operable to cause charge to be transferred from the capacitive load to the capacitive storage subsystem. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
-
-
47. An apparatus comprising:
-
a capacitive load;
a voltage source;
a switch network; and
a capacitive storage system, wherein the switch network is operable to electrically connect the capacitive load and the voltage source to drive the load to a first voltage level, wherein the switch network is further operable to electrically connect the capacitive load and the capacitive storage system, and wherein when the capacitive storage system and the capacitive load are electrically connected by the switch network, the capacitive storage system is electrically isolated from the voltage source, and wherein the switch network is further operable to cause charge to be transferred from the capacitive storage subsystem to the capacitive load and is still further operable to cause charge to be transferred from the capacitive load to the capacitive storage subsystem. - View Dependent Claims (48, 49, 50, 51, 52, 53, 54, 55, 56, 57)
-
-
58. An apparatus for driving a capacitive load, comprising:
-
a voltage source; and
a switch network, wherein the switch network is operable to electrically connect the capacitive load and the voltage source to drive the load to a first voltage level, wherein the switch network is further operable to electrically connect the capacitive load and a capacitive storage system, and wherein when the capacitive storage system and the capacitive load are electrically connected by the switch network, the capacitive storage system and the capacitive load are electrically floating, and wherein the switch network is further operable to cause charge to be transferred from the capacitive storage subsystem to the capacitive load and is still further operable to cause charge to be transferred from the capacitive load to the capacitive storage subsystem. - View Dependent Claims (59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69)
-
-
70. An apparatus comprising:
-
a capacitive load;
a voltage source;
a switch network; and
a capacitive storage system, wherein the switch network is operable to electrically connect the capacitive load and the voltage source to drive the load to a first voltage level, wherein the switch network is further operable to electrically connect the capacitive load and the capacitive storage system, and wherein when the capacitive storage system and the capacitive load are electrically connected by the switch network, the capacitive storage system and the capacitive load are electrically floating, and wherein the switch network is further operable to cause charge to be transferred from the capacitive storage subsystem to the capacitive load and is still further operable to cause charge to be transferred from the capacitive load to the capacitive storage subsystem. - View Dependent Claims (71, 72, 73, 74, 75, 76, 77, 78, 79, 80)
-
Specification