Patent ID: 8787865

Claim:
An activation circuit for activating an electronic communication device, the activation circuit comprising: a first accelerometer in the electronic communication device; a second accelerometer configured to be activated by a movement signal from the first accelerometer; a circuit connected to the second accelerometer to generate an output signal when the circuit detects two or more connected movement signals from the second accelerometer analyzed as a series of sequential components that match a movement gesture; an input device; a threshold detector circuit connected to an output of the second accelerometer and configured to compare the output against a threshold value and generate an activation signal when the threshold value is exceeded; and a monitoring circuit connected to the input device, the monitoring circuit comprising a plurality of staged latches that generate a trigger signal used to provide power to the input device based on a slow clock signal and a reset signal provided to the plurality of staged latches, the slow clock signal and the reset signal being generated by a microprocessor in the electronic communication device, wherein the first accelerometer is an analog accelerometer and the second accelerometer is a digital accelerometer.