Remote control wake up detector system
First Claim
1. A remote control system having a device and an input digital data stream, the device having a sleep mode of operation to conserve energy and an awake mode operation, the input digital data stream having a frequency, said system comprising:
- an analog filter for removing noise and for passing the input digital data stream, said passed input digital data stream having a transient response comprising an oscillating signal of increasing peak-to-peak amplitude; and
a switch for comparing said transient response of said passed input digital data stream with a threshold voltage, and for switching the device from the sleep mode of operation to the awake mode of operation if said transient response of said passed input digital data stream reaches said threshold voltage.
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Accused Products
Abstract
A wake up detector system is provided having a device with a sleep mode of operation to conserve energy and an awake mode operation, and an input digital data stream having a frequency. The system includes an analog filter for removing noise, and for passing the input digital data stream such that the passed input digital data stream includes a transient response consisting of an oscillating signal of increasing peak-to-peak amplitude. The system further includes a switch for comparing the transient response of the passed input digital data stream with a threshold voltage, and for switching the device from the sleep mode of operation to the awake mode of operation when the transient response of the passed input digital data stream reaches the threshold voltage.
42 Citations
19 Claims
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1. A remote control system having a device and an input digital data stream, the device having a sleep mode of operation to conserve energy and an awake mode operation, the input digital data stream having a frequency, said system comprising:
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an analog filter for removing noise and for passing the input digital data stream, said passed input digital data stream having a transient response comprising an oscillating signal of increasing peak-to-peak amplitude; and a switch for comparing said transient response of said passed input digital data stream with a threshold voltage, and for switching the device from the sleep mode of operation to the awake mode of operation if said transient response of said passed input digital data stream reaches said threshold voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A receiver for receiving a remote control signal and for generating a serial digital data stream having an operating frequency, said receiver comprising:
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a processing system having a sleep mode of operation to conserve energy and an awake mode operation; a wake up detector for switching said processing system between said sleep mode and said awake mode, said wake up detector comprising; a passband filter for receiving said serial digital data stream, for removing noise, and for passing said serial digital data stream as an output having a transient response comprising an oscillating signal of increasing peak-to-peak amplitude, said passband filter having a center frequency substantially equal to said operating frequency of said serial digital data stream; and a switch for comparing said transient response of said passed serial digital data stream with a threshold voltage, and for switching said processing system from said sleep mode to said awake mode if said transient response of said passed serial digital data stream reaches said threshold voltage. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A remote control system remotely controlled by an analog remote control signal, said remote control system comprising:
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a radio frequency receiver for receiving said analog remote control signal, and for generating a serial digital data stream having an operating frequency; a microprocessor having a sleep mode of operation to conserve energy, and an awake mode of operation to process information; and a wake up detector for switching said microprocessor between said sleep mode and said awake mode, said wake up detector comprising; an active analog passband filter for receiving said serial digital data stream, for removing noise, and for passing said input digital data stream as an output having a transient response comprising an oscillating signal of increasing peak-to-peak amplitude, said analog passband filter having a center frequency substantially equal to said operating frequency of said serial digital data stream; and a switch for comparing said transient response of said output of said active analog passband filter with a threshold voltage, and for switching said microprocessor from said sleep mode to said awake mode of operation if said transient response of said output of said active analog passband filter reaches said threshold voltage, said switch comprising; a feedback impedance for protecting said microprocessor; and a comparator for comparing said transient response of said output of said active analog passband filter with said threshold voltage. - View Dependent Claims (18, 19)
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Specification