HIGH SPEED SWITCHING
First Claim
1. An apparatus comprising:
- a transistor having a source and drain connected in series between an input port and an output port, and a gate configured and arranged to switch the transistor between an on state in which the transistor connects the input port to the output port, and an off state in which the transistor disconnects the input port from the output port;
a charge storage circuit configured and arranged to store a charge; and
a switching circuit configured and arranged to switch the transistor between the on state and the off state byin a first charging mode, coupling a voltage across the charge storage circuit and storing a charge in the charge storage circuit while decoupling the transistor from the charge storage circuit, andin a second discharge mode, switching the transistor from the off state to the on state by coupling the stored charge across the gate and one of the source and drain of the transistor.
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Accused Products
Abstract
Switching circuits are implemented in a manner that facilitates fast switching, which can be effected while also maintaining relatively low power dissipation. As may be implemented in connection with one or more embodiments, an apparatus includes a transistor connected between an input port and an output port, and a gate that switches between on and off states. A charge storage circuit stores a charge, and a switching circuit operates by switching the transistor between the on and off states as follows. In a first charging mode, a voltage is coupled across the charge storage circuit and a charge is stored therein, while decoupling the transistor from the charge storage circuit. In a second discharge mode, the transistor is switched from the off state to the on state, while coupling the stored charge across the gate and one of the source and drain of the transistor.
2 Citations
20 Claims
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1. An apparatus comprising:
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a transistor having a source and drain connected in series between an input port and an output port, and a gate configured and arranged to switch the transistor between an on state in which the transistor connects the input port to the output port, and an off state in which the transistor disconnects the input port from the output port; a charge storage circuit configured and arranged to store a charge; and a switching circuit configured and arranged to switch the transistor between the on state and the off state by in a first charging mode, coupling a voltage across the charge storage circuit and storing a charge in the charge storage circuit while decoupling the transistor from the charge storage circuit, and in a second discharge mode, switching the transistor from the off state to the on state by coupling the stored charge across the gate and one of the source and drain of the transistor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus comprising:
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a first circuit configured and arranged to store a charge; a transistor having a source, drain and gate, the transistor being configured and arranged to operate in an on state in which data is passed between an input port and an output port via the source and drain, and in an off state in which data is not passed between the input port and the output port; and a second circuit configured and arranged to operate in a first mode by coupling a supply voltage to the first circuit and storing a charge in the first circuit, and operate in a second mode by coupling the supply voltage to the gate, decoupling the supply voltage from the first circuit and, after decoupling the supply voltage from the first circuit, coupling the stored charge across the gate and one of the source and drain of the transistor. - View Dependent Claims (12, 13, 14)
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15. A method comprising:
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storing a charge in a charge storage circuit; and using a switching circuit, operating a transistor having a source and drain connected in series between an input port and an output port, and a gate that switches the transistor between an on state, in which the transistor connects the input port to the output port, and an off state, in which the transistor disconnects the input port from the output port, by in a first charging mode, coupling a voltage across the charge storage circuit and storing a charge in the charge storage circuit while decoupling the transistor from the charge storage circuit, and in a second discharge mode, switching the transistor from the off state to the on state by coupling the stored charge across the gate and one of the source and drain of the transistor. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification