TWO STAGE POWER CONTROL SYSTEM FOR AUTOMOTIVE DEVICES
First Claim
1. A power control circuit for controlling first power from a power supply provided to a first circuit, the power control circuit, the power control circuit comprising:
- a first stage comprising a low power energy detector and a first power switch, the low power energy detector configured to provide second power via the first switch in response to energy; and
a second stage comprising a signal detector configured to detect a characteristic of a signal associated with the energy in response to the second power, wherein the signal detector is configured have the first power provided to the first circuit in response to the characteristic being detected.
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Abstract
A system and method includes a power control circuit for controlling first power from a power supply provided to a first circuit includes a first stage and a second stage. The first stage includes a low power energy detector and a first power switch. The low power energy detector is configured to provide second power via the first switch in response to energy. The second stage includes a signal detector configured to detect a characteristic of a signal associated with the energy in response to the second power. The signal detector is configured have the first power provided to the first circuit in response to the characteristic being detected.
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Citations
20 Claims
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1. A power control circuit for controlling first power from a power supply provided to a first circuit, the power control circuit, the power control circuit comprising:
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a first stage comprising a low power energy detector and a first power switch, the low power energy detector configured to provide second power via the first switch in response to energy; and a second stage comprising a signal detector configured to detect a characteristic of a signal associated with the energy in response to the second power, wherein the signal detector is configured have the first power provided to the first circuit in response to the characteristic being detected. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of providing a power signal, the method comprising:
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detecting a signal at an input of a first circuit using a first circuit in a first power mode; validating the signal using a second circuit in a second power mode; and providing the power signal to a third circuit if the first signal is validated. - View Dependent Claims (9, 10, 11, 12, 13)
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14. An apparatus, comprising:
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a first detector; a second detector; a first power switch comprising a first control input and a first power output, the first control input being coupled the first detector and the first power output being coupled to the second detector; and a second power switch comprising a second control input and a second power output, the second control input being coupled the second detector, wherein the first detector is configured to operate in a first power mode and is configured to detect a signal and control the first power switch to provide first power to the first power output in response to a detection of the signal, wherein the second detector is configured to operate in a second power mode and is configured to validate the signal and control the second power switch to provide second power to the second power output in response to a validation of the signal. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification