CN2154577Y

CN2154577Y - Channal unit for radio microphone

Info

Publication number: CN2154577Y
Application number: CN 93206051
Authority: CN
Inventors: 杨朝明
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-03-17
Filing date: 1993-03-17
Publication date: 1994-01-26
Anticipated expiration: 2003-03-17

Abstract

The utility model relates to a transmitter for radio microphones, which is used for amplifying sound at meeting places and platforms. The utility model comprises an emitter and a receiver. A signal processing circuit is arranged in the emitter. The receiver is used for receiving signals emitted from the emitter and is plugged directly into the input holes of the microphone of an ordinary audio amplifier or a radio recorder through plug-in parts after the signals are amplified, so that the transmitting effect of using the microphone is obtained.

Description

Channal unit for radio microphone

The utility model relates to a kind of radio microphone conveyer, and particularly a kind of mat high frequency transmits to reach the radio microphone conveyer that signal transmits purpose.

In the modern life, people pay much attention to the entertainment life, a lot of families or individual have music or radio-tape recorder, except energy broadcast listening or recording, still can record various acoustical signals by pick up devices such as microphones, because Karaoke in recent years is in vogue and the development of industry and commerce, in relatively large meeting place, speech occasion etc., microphone is more widely-used, but when generally using microphone, the microphone output line must be connected to expander, owing to limited by holding wire, often cause the restriction of activity space, and very easily cause attachment plug to come off, very inconvenience because of touching holding wire.

Though there is commercially available radio microphone present stage, except that the radio device of specialty usefulness, the situation of utilizing the broadcast receiver broadcasting channel to receive is also arranged.The specialty radio device can't extensively be promoted the use of because its particular characteristic and price are high, and the latter's receive mode, owing to must utilize the broadcast receiver broadcasting channel, and can't be used in the enlarger.

Main purpose of the present utility model is to provide a kind of radio microphone conveyer, mainly comprise an emitter, the acoustical signal that microphone is picked up, via being sent to the reception body after the processing of emitter high-frequency signal, and should receive body and be plugged in expander, and realize that radio microphone transmits effect, during use, be not subjected to spatial limitation, and the trouble of not having backguy, more because the setting of volume, deciphering produces interference phenomenon in the time of can avoiding two groups or more sound reinforcement system to use simultaneously, so that the maximum function of use of microphone performance.

Radio microphone conveyer of the present utility model comprises that an emitter and receives the body emitter and comprises microphone, signal processing circuit and transmitting antenna, receives body and comprises reception antenna, signal processing circuit; The emitter pick-up of acoustic signals, be sent to the reception body through signal processing, it is characterized in that, receive body and also comprise the connector that is connected in signal processing circuit, it directly is plugged in the microphone input hole of expander, the signal of microphone is sent to the reception body by wireless transmission method, is amplified through expander.

The signal processing circuit of described emitter comprises, pre-amplification circuit, high-frequency circuit and coding circuit; Receive the body signal processing circuit and comprise high-frequency amplifier circuit, switching circuit, pre-amplification circuit, decoding circuit; Emitter after pre-amplification circuit amplifies, inputs to high-frequency amplifier circuit by the microphone pick-up of acoustic signals, and cryptochannel is transported to high-frequency amplifier circuit with code signal, and output signal is launched by antenna; Receive body and receive the signal that emitter is launched by antenna, input to high-frequency amplifier circuit, decoding circuit is decoded to the signal of high-frequency circuit, is exported by connector after switching circuit and pre-amplification circuit amplification through the signal of high frequency amplification and decoding processing.

Effect of the present utility model: this conveyer is except that the result of use that has possessed radio microphone, again because the setting of mat coding and decoding circuit, more can reach mutually do not disturb, purpose of power saving owing to adopt wireless transmission method, no longer be subjected to the restriction of electric wire during use; Reception body of the present utility model can directly be plugged on the general sound amplifier and use; It is a practical conveyer.

Conjunction with figs. and embodiment are described as follows the utility model:

Fig. 1: use schematic diagram of the present utility model;

Fig. 2: reception body device schematic diagram of the present utility model;

Fig. 3: circuit block diagram of the present utility model;

Fig. 4: emitter circuit diagram of the present utility model;

Fig. 5: reception body circuit diagram of the present utility model.

As shown in Figure 1, this device is provided with emitter 10, be sent to reception body 12 by the signal processing circuit processing and with signal with wireless transmission method, receive the microphone input jack that body 12 is plugged in expander or radio-tape recorder 13, and via after expander or radio-tape recorder 13 amplifications, by loud speaker 14 output acoustical signals.

As shown in Figure 2, receiving body 12 is a box-like device, and the signal of reception is plugged in the microphone input port 23 of expander or radio-tape recorder via connector 45 after internal circuit gives preposition amplification, and amplifies via expander or radio-tape recorder 13.

As shown in Figure 3, circuit block diagram of the present utility model is when microphone 30 is obtained signal after after being amplified by pre-amplification circuit 31, input to high-frequency amplifier circuit 33, set coding is locked via coding circuit 32, and locking signal is imported high-frequency circuit 33, via antenna 34 emissions.

When the antenna 40 that receives body receives the signal that electric emitter launches, via high-frequency amplifier circuit 41 signal is amplified, and set with sending out by decoding circuit 42 and to establish signal and obtain synchronously, and switching circuit 43 is opened, to supply with pre-amplification circuit 44 power supplys, signal is amplified after by microphone connector 45, import expander via pre-amplification circuit 44.

As shown in Figure 4, it is the circuit diagram of emitter of the present utility model, and wherein, pre-amplification circuit 31 mainly comprises triode Q ₁₀₁, capacitor C ₁₀₁, high-frequency circuit 33 mainly comprises triode Q ₁₀₂, capacitor C ₁₀₂It is the integrated circuit of HT-12E that coding circuit 32 adopts model; Microphone 30 picks up voice signal, through capacitor C ₁₀₁Be coupled to triode Q ₁₀₁Base stage, carry out voltage amplification, again through the capacitor-coupled of high-frequency circuit 33 to triode Q ₁₀₂, set coding is added to triode Q via coding circuit 32 ₁₀₂, treated high-frequency signal is through triode Q ₁₀₂Collector electrode by antenna 34 output.

As shown in Figure 5, it is a reception body circuit diagram of the present utility model, and wherein high-frequency amplifier circuit 41 mainly comprises triode Q ₂₀₂Pre-amplification circuit 44 mainly comprises triode Q ₂₀₁It is the integrated circuit of HT-12D that decoding circuit 42 is taked model; It is the TDA7010 integrated circuit that switching circuit 43 is taked model.

Claims

1, a kind of radio microphone conveyer, it comprises that an emitter and receives body, emitter comprises microphone, signal processing circuit and transmitting antenna, receive body and comprise reception antenna, signal processing circuit, the emitter pick-up of acoustic signals, be sent to the reception body through signal processing, it is characterized in that, receive body and also comprise the connector that is connected in signal processing circuit, it directly is plugged in the microphone input hole of expander, and the signal of microphone is sent to the reception body by wireless transmission method, is amplified through expander.

2, radio microphone conveyer according to claim 1 is characterized in that, the signal processing circuit of described emitter comprises.Pre-amplification circuit, high-frequency circuit and coding circuit; Receive the body signal processing circuit and comprise high-frequency amplifier circuit, switching circuit, pre-amplification circuit, decoding circuit; Emitter after pre-amplification circuit amplifies, inputs to high-frequency amplifier circuit by the microphone pick-up of acoustic signals, and cryptochannel is transported to high-frequency amplifier circuit with code signal, and output signal is launched by antenna; Receive body and receive the signal that emitter is launched by antenna, input to high-frequency amplifier circuit, decoding circuit is decoded to the signal of high-frequency circuit, is exported by connector after switching circuit and pre-amplification circuit amplification through the signal of high frequency amplification and decoding processing.

3, radio microphone conveyer according to claim 1, it is characterized in that, it is the integrated circuit of HT-12E that described coding circuit is taked model, and it is the integrated circuit of HT-12D that decoding circuit is taked model, and it is the integrated circuit of TDA7010 that switching circuit is taked model.