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US 9,871,506 B2Granted
Switchable decoupling capacitors
AssigneeQUALCOMM Incorporated
InventorsRyan Michael Coutts, Mikhail Popovich
Life of this patent
Estimating the term…
Abstract
Aspects of an integrated circuit are disclosed. The integrated circuit includes a first circuit configured to be powered by a first voltage source, a second circuit configured to be powered by a second voltage source, a decoupling capacitor, and a controller configured to switch the decoupling capacitor between the first and second voltage source.
Claims9
An integrated circuit, comprising:
- a first circuit configured to be powered by a first voltage source;
- a second circuit configured to be powered by a second voltage source;
- a decoupling capacitor;
- and
- a controller configured to switch the decoupling capacitor between the first and second voltage sources, the controller comprising:
- a first switch circuit between the decoupling capacitor and the first voltage source:
- a second switch circuit between the decoupling capacitor and the second voltage source;
- and
- a switch decoder configured to control the first and second switch circuits, wherein each of the first and second switch circuits comprises a variable resistance, the switch decoder further configured to control the first switch circuit to charge the decoupling capacitor from the first voltage source through a first resistance, and to control the second switch circuit to supply current from the charged decoupling capacitor to the second circuit through a second resistance, the first resistance being higher than the second resistance.
6 more elements
An integrated circuit, comprising:
- first processing means for processing data, the first processing means being configured to be powered by a first voltage source;
- second processing means for processing data, the second processing means being configured to be powered by a second voltage;
- decoupling means for decoupling the first and second processing means;
- and
- means for switching the decoupling means between the first and second voltage sources, the means for switching comprising:
- first switching means for controlling a connection between the decoupling means and the first voltage source;
- second switch means for controlling a connection between the decoupling means and the second voltage source;
- and
- means for controlling the first and second switch means, wherein each of the first and second switching means comprises a variable resistance, the means for controlling the first and second switch means further configured to control the first switching means to charge the decoupling means from the first voltage source through a first resistance, and to control the second switch means to supply current from the charged decoupling means to the second processing means through a second resistance, the first resistance being higher than the second resistance.
6 more elements
A method of decoupling first and second circuits, comprising:
- processing data with the first circuit powered by a first voltage source;
- processing data with the second circuit powered by a second voltage;
- and
- switching a decoupling capacitor between the first and second voltage sources, wherein the decoupling capacitor is switched by controlling a connection between the decoupling capacitor and the first voltage source with a first switching circuit, and controlling a connection between the decoupling capacitor and the second voltage source with a second switching circuit, each of the first and second switching circuits comprising a variable resistance, the connection between the decoupling capacitor and the first voltage source controlled to charge the decoupling capacitor from the first voltage source through a first resistance, and wherein the connection between the decoupling capacitor and the second voltage source is controlled to supply current from the charged decoupling capacitor to the second circuit, through a second resistance, the first resistance being higher than the second resistance.
1 more element
Dependencies are inferred from the claim text.