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公开(公告)号：US20180309447A1
公开(公告)日：2018-10-25
申请号：US15849752
申请日：2017-12-21
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Anurag ARORA , Hariharan NAGARAJAN , Sumantra SETH
CPC classification number: H03K19/0016 , H04L12/12 , H04L12/40006
Abstract: A wakeup circuit includes an amplification stage circuit and a filter stage circuit. The amplification stage circuit is configured to, in response to receiving an input signal, generate an amplified digital signal that is proportional to the input signal. The filter stage circuit is configured to, in response to receiving a threshold number of toggles of the amplified digital signal within a pre-defined time period (such as one clock period of a clock signal), generate a wakeup signal as an output signal of the filter stage circuit.
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