ULTRA HIGH FREQUENCY BAND AMPLIFIED SPEAKER SYSTEM

PURPOSE: A UHF(Ultra High Frequency) speaker amplifier system is provided to increase an output of an audio amplifier and improve noise and howling sound by forming a UHF receiver and the audio amplifier with one body. CONSTITUTION: An RF amplifier portion(10) receives radio frequencies of 700MHz or...

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Bibliographische Detailangaben
1. Verfasser: HAN, DAE HYEON
Format: Patent
Sprache:eng ; kor
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Beschreibung
Zusammenfassung:PURPOSE: A UHF(Ultra High Frequency) speaker amplifier system is provided to increase an output of an audio amplifier and improve noise and howling sound by forming a UHF receiver and the audio amplifier with one body. CONSTITUTION: An RF amplifier portion(10) receives radio frequencies of 700MHz or 900MHz. The first local oscillation circuit(20) generates the first oscillation frequency to the first mixer circuit(30). The first mixer circuit(30) generates the first intermediate frequency. The second local oscillation circuit(40) generates the second oscillation frequency to an output amplifier(500). The second mixer circuit(50) generates the second intermediate frequency. An IF amplification portion(60) amplifies the second intermediate frequency of a receiver(400). A muting switch(70) drives a muting driver and indicates a LED. An expander(80) compresses a signal of the muting switch(70) and filters an unnecessary S/N ratio. An audio frequency amplification portion(90) amplifies an output signal of the expander(80). A pre-amplification portion(100) and a tone control and a wire/wireless connection portion(110) are used for controlling a tone. A power supply portion(120) supplies internal driving power. An audio amplification portion(130) amplifies an audio signal of the pre-amplification portion(100). A protective circuit portion(140) protects an output transformer or a speaker(150). 본 발명은 출력앰프가 내장되는 스피커 기술에 관한 것으로, 특히 UHF(Ultra High Frequency: 극초단파) 대역을 사용하여 원격의 무선 송신기와 오디오 대출력 앰프를 내장한 스피커로 구성되는 극초단파 스피커 앰프 시스템에 관한 것이다. 본 발명은 UHF 대역 수신기와 오디오 앰프가 일체형으로 결합된 극초단파 스피커 앰프 시스템을 구현함으로써 기존 앰프의 소출력 저효율의 문제점을 개선하여 대출력을 구현할 수 있으며, 사용의 편리성, 원가절감 및 대량 양산 체제 구축할 수 있으며, 노이즈와 하울링을 개선한다.