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US 2019/0097631 A1Published application
Low leakage power switch
AssigneeApple Inc.
InventorsJaemyung Lim, Jaroslav Raszka, Mohamed H. Abu-Rahma
Life of this patent
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Abstract
Computer systems may include multiple power switch circuits for coupling circuit blocks to power supply signals. Different power supply signals may be selected for use in the generation a control signal for a power switch device in the power switch circuit. For example, during a particular operating mode of a power switch circuit coupled to a circuit block, a power supply signal with a voltage level greater than an power supply signal for the circuit block may be used to generate the control signal.
Claims20
An apparatus, comprising:
- a switch device configured to selectively couple a power terminal of a circuit block to a first power supply signal based on a switch control signal;
- and
- a control circuit configured to:
- receive a mode control signal and an input control signal;
- select one of the first power supply signal and a second power supply signal based on the mode control signal, wherein a voltage level of the second power supply signal is greater than a voltage level of the first power supply signal;
- and
- generate the switch control signal using the input control signal and a selected power supply signal.
4 more elements
A method, comprising:
- receiving an input control signal by a power switch circuit that includes a switch device coupled between a power terminal of a circuit block and a first power supply signal;
- selecting, based on a mode control signal, either the first power supply signal or a second power supply signal, wherein a voltage level of the second power supply signal is greater than a voltage level of the first power supply signal;
- and
- selectively deactivating the switch device based on the input control signal and using a selected one of the first and second power supply signals.
1 more element
A system, comprising:
- a plurality of circuit blocks;
- a power management unit configured to generate a plurality of internal power supply signals using an external power supply signal;
- a first power switch circuit coupled between a power terminal of a particular one of the plurality of circuit blocks and a first internal power supply signal of the internal power supply signals, wherein the first power switch circuit is configured to:
- receive a mode control signal and an input control signal;
- select one of the first internal power supply signal and a second internal power supply signal of the plurality of internal power supply signals based on the mode control signal, wherein a voltage level of the second internal power supply signal is greater than a voltage level of the first internal power supply signal;
- generate a switch control signal using the input control signal and a selected internal power supply signal;
- and
- selectively couple the power terminal to the first internal power supply signal based on the switch control signal.
5 more elements
Dependencies are inferred from the claim text.