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1. (WO2018157340) INFRARED RECEIVER AND INFRARED SIMULTANEOUS INTERPRETATION SYSTEM

Pub. No.:    WO/2018/157340    International Application No.:    PCT/CN2017/075375
Publication Date: Sat Sep 08 01:59:59 CEST 2018 International Filing Date: Fri Mar 03 00:59:59 CET 2017
IPC: H04B 10/69
Applicants: SHENZHEN TAIDEN INDUSTRIAL CO., LTD.
深圳市台电实业有限公司
Inventors: ZHOU, Qingxu
周庆叙
ZHANG, Zhishuo
张知硕
Title: INFRARED RECEIVER AND INFRARED SIMULTANEOUS INTERPRETATION SYSTEM
Abstract:
An infrared receiver and an infrared simultaneous interpretation system. In the infrared receiver, a central controller (3) controls a local oscillation signal generation module (101) so that same outputs a local oscillation signal to a first mixer (102) and a second mixer (104); the first mixer (102) receives a pre-processed sub-carrier combined signal, mixes same with the local oscillation signal and then outputs a first sum difference frequency signal to a band-pass filter (103); the band-pass filter (103) filters the first sum difference frequency signal and then outputs an intermediate frequency signal to the second mixer (104); the second mixer (104) mixes the intermediate frequency signal with the local oscillation signal and then outputs a second sum difference frequency signal to a low-pass filtering module (105); and the low-pass filtering module (105) filters the second sum difference frequency signal and then outputs a single-path sub-carrier signal to an infrared processing chip (7). Therefore, the present invention economically and practically solves the problem that existing infrared receivers have a poor receiving effect on high-frequency band sub-carriers.