Patent ID: 9535266
Date: 2017-01-03
CPC Classifications: A61F,G02C,H02J,H03K

Claim:
1. An electronic system including a wake circuit configured for use in at least one of on or in the body, the electronic system comprising: functional electronics, including a digital controller and additional circuitry; a power supply for supplying power to the functional electronics; a wake logic circuit having a storage state and an active state configured to decouple the power supply from the functional electronics to minimize leakage current from the power supply when in the storage state; a switching element coupled to the power source, the wake logic circuit and the functional electronics; a first power-on reset circuit coupled between the power supply and the wake logic circuit and configured to ensure a proper initial state for the wake logic circuit on power-up and hold the wake circuit in a reset condition for at least as long as a power-up stabilization time of the wake logic circuit; a second power-on reset circuit coupled between the switching element and the functional electronics and configured to ensure a proper initial state for the functional electronics on power-up; and a sensor coupled to the wake logic circuit, the sensor comprising a photodetector and wherein the wake logic circuit is configured to switch from the storage state to the active state when at least one of the sensor is activated in response to light having an intensity greater than a predetermined threshold being shone on the photodetector or in response to an output of the second power-on reset circuit.