Patent ID: 8693877
Filing Date: 2014-04-08
Classification: H03K,H04B,H04M

Abstract:
1. An apparatus to sense proximity, to sense infrared (IR) data signals, and to sense ambient light, the apparatus comprising: an emitter of an IR proximity signal; a sensor configured to detect the IR proximity signal, an IR data signal, and an ambient light signal, wherein each of the IR proximity signal, the IR data signal, and the ambient light signal are in a different frequency band; a single time division multiplexing filter coupled to the sensor and configured to demodulate and pass the detected IR proximity signal when the apparatus is sensing proximity, the detected IR data signal when the apparatus is detecting IR data, and the detected ambient light signal when the apparatus is detecting ambient light, wherein the single time division multiplexing filter comprises a programmable filter coupled to the sensor, a programmable demodulator/amplitude detector coupled to the programmable filter, a timing sequence controller coupled to the programmable demodulator/amplitude detector, and a microcontroller coupled to the timing sequenced controller; and a microprocessor coupled to the single time division multiplexing filter and configured to process the passed IR proximity signal, the passed IR data signal, and the passed ambient light signal to operate the apparatus.