Patent ID: 8509857
Filing Date: 2013-08-13
Classification: H04M,H04R

Abstract:
1. A headset detector comprises: A first flag generator configured to detect a connection of an accessory and to generate a first flag in response to the connection of the accessory, the accessory including a microphone and a switch connected to the microphone; a second flag generator including a low current source and a high current source, wherein the low current source is enabled during both a first time period and a second time period, the second flag generator configured to periodically detect a signal above a predetermined threshold for each of a first comparator and a second comparator, to enable the high current source only during the second time period, to set, in response to the first flag being generated during the first time period, a state of a second flag based on an output state of the first comparator, wherein the output of the first comparator is based on a current from the low current source during the first time period, and to set, in response to the first flag being generated during the second time period, the state of the second flag based on an output state of the second comparator, wherein the output of the second comparator is based on a current from the high current source during the second time period.