Patent ID: 6931136
Filing Date: 2005-08-16
Classification: H04B,H04R

Abstract:
1. An infrared emitter, being used as an emitting source of a stereophonic amplifier with left sound channel and right sound channel, comprising: a preamplifier of which one end is an input source of its left sound channel and right sound channel, and of which the other end amplifies and emits sounds of said left sound channel and right sound channel; an infrared RF emitter including a channel A, a channel B and two set of mixers, said channel A includes a left sound channel of a first frequency and a right sound channel of a third frequency; said channel B includes a left sound channel of a second frequency and a right sound channel of a fourth frequency; one end of said infrared RF emitter is used to receive amplified sounds of said left sound channel and right sound channel of said preamplifier; the other end is used to emit said sounds of said left sound channel and right sound channel wirelessly in a mode of FM carrier wave; an infrared channel controller connecting with said infrared RF emitter for switching between said channel A and said channel B in said infrared RF emitter; and a photodiode emitting-medium to receive and emit said sounds of the channel A and the channel B emitted from said infrared RF emitter, said photodiode emitting-medium includes two Darlington amplifying circuits and four diodes A, B, C and D, wherein said diodes A, B are infrared emitting diodes for left sound channel, and said diodes C, D are infrared emitting diodes for right sound channel; one of said Darlington amplifying circuits is juxtaposed with said infrared emitting diodes A, C, the other of said Darlington amplifying circuits is juxtaposed with said infrared emitting diodes B, D; and said infrared emitting diode A is of said first frequency, said infrared emitting diode B is of said third frequency, said infrared emitting diode C is of said second frequency, while said infrared emitting diode D is of said fourth frequency; thereby, crosstalk disturbance during transmitting carrier waves is inhibited by switching between said channel A and said channel B with said infrared channel controller and by a mode of arrangement of said infrared emitting diodes on parts in said photodiode emitting-medium, as well as by using said two set of mixers to respectively control energy adjustment of said diodes A and B and energy adjustment of said diodes C and D.