An integrated talk back module and talk back system based on this module
An intercom module and baseband processing technology, applied in the field of wireless communication, can solve problems such as poor consistency of stability and technical parameters, complex production and debugging, and high cost, so as to improve technical parameters and stability, solve complex circuit structure differentiation, and cost cheap effect
Active Publication Date: 2008-02-20
泉州力同科技有限公司
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Problems solved by technology
However, with the development of walkie-talkies towards small size, low cost, strong functions, high reliability, and more commercialization, this traditional analog signal processing technology also shows more and more problems.
For example, the differentiation of the circuit structure is complicated, and there are hundreds of discrete components, which seriously limits the R&D and innovation of walkie-talkie products; in addition, the production and debugging of its products are complicated, the consistency of stability and technical parameters is poor, and the cost is high.
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[0018] The present invention will be further described below in conjunction with specific embodiments with reference to the accompanying drawings.
[0019] As shown in FIGS. 1 and 2 , the integrated intercom module according to the embodiment of the present invention includes a radio frequency receiving part 1 , a radio frequency transmitting part 2 , a baseband signal processing part 3 and a digital interface control part 4 . The radio frequency receiving part 1 includes a low-noise amplifier 11 , a mixer 12 , a low-pass filter 13 , a programmable amplifier 14 , a first analog-to-digital converter 15 , a digital processing unit 16 , and a digital FM demodulator 17 . The radio frequency transmitting part 2 includes an FM depth adjuster 21 , a phase-locked loop frequency synthesizer 22 and a power amplifier 23 . The baseband signal processing part 3 includes a filter shaper 331, a first speech filter 311, a digital-to-analog converter 312, a speech amplifier 313, a second analo...
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The utility model discloses an integrated talkback module and a module-based talkback system. The integrated talkback module comprises a radio frequency receiving part, a radio frequency emitting part and a baseband signal processing part. The radio frequency receiving part is used to receive the radio frequency signal; demodulate the voice signal and the signaling signal and output the voice signal and the signaling signal to the baseband signal processing part. The baseband signal processing part is used to process the voice signal and the signaling signal received from the radio frequency receiving part and input the processed voice signal and signaling signal to the radio frequency emitting part. The radio frequency emitting part is used to modulate the voice signal and the signaling signal received from the baseband signal processing part on the radio frequency carrier for outputting. The radio frequency receiving part, the radio frequency emitting part and the baseband signal processing part are integrated in a single chip via the CMOS technology. Because all the circuits are integrated in a single chip, the device of the utility model has the advantages of simple circuit, low cost, improved technical parameter and strong stability.
Description
technical field [0001] The invention relates to the field of wireless communication, in particular to an integrated intercom module and an intercom system based on the module. Background technique [0002] Existing walkie-talkies are divided into two categories: professional and civilian (public walkie-talkies). A professional machine refers to a machine with a transmission power greater than 4W, which is mainly used for applications with a long communication distance, such as: public security, security and professional mountaineering athletes, etc.; a civilian machine refers to a machine with a transmission power of no more than 0.5W, which mainly meets the requirements for communication distances. Applications with less strict requirements, such as: restaurants, hotels, exhibitions and outings, etc.; in the current walkie-talkie market, whether it is a professional machine or a civilian machine, the leading technology is based on phase-locked loop frequency synthesis techn...
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IPC IPC(8): H04Q5/24H04B1/40H04B1/3827
Inventor 蔡东志匡国生
Owner 泉州力同科技有限公司