JP3012112U - Sound collector - Google Patents

Abstract

(57) [Abstract] [Purpose] The combination of both the transmitting circuit and the receiving circuit allows the sound collector to fully exert its effect, and at the same time obtain an extremely good sound collecting effect without being restricted by the distance. Also, the sound collector is designed with safety in mind to protect the human body. [Structure] The present invention relates to a structure of a sound collector, which is composed of one transmitting circuit and one receiving circuit. Between the transmitting circuit and the receiving circuit, the transmitting antenna and the receiving antenna inside the both are connected to the transmission bridge. And on the transmission circuit, you can select from a large number of selection items such as telephone sound collection, microphone sound collection and television, sound with one selection switch,
The receiving circuit receives the transmission of the collected sound by the transmitting circuit, and also has the automatic volume control circuit and the high and low tone boosting circuit, provides the user with the proper collected sound volume and sound quality, and receives the sound volume at the distant place. It can have a good sound collecting effect.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improved structure of a kind of sound collector, and in particular, it is a sound collector suitable for obtaining a kind of sound collection for telephone, microphone sound collection and television, sound, etc. In addition, the present invention relates to a device capable of collecting sound at a long distance and a short distance, being not affected by the distance, and at the same time appropriately adjusting the collected sound volume to perform good sound collection.

[0002]

[Problems to be solved by the device]

 The sound collector of the present invention can be used for wireless transmission in various fields such as voice, telephone, voice frequency, television, sound, and video, voice, recording interface, and sound collection application. Another issue is to be able to receive FM broadcast signals as well.

In the sound collector of the present invention, one high and low sound enhancement circuit is installed inside the receiving circuit, and it is possible to amplify and collect a specific sound source (high sound or low sound) and achieve an extremely good sound collecting effect. The following purposes are also useful for users.

A third aspect of the sound collector of the present invention is to provide an automatic volume control circuit inside the receiving circuit to prevent the human ear from being injured due to the excessive volume of the volume. Target

[0005]

[Means for Solving the Problems]

 The sound collector of the present invention includes a transmission circuit and a reception circuit, and the transmission circuit includes a telephone signal coupling circuit, a microphone amplification circuit, a signal matching network, a selection switch, a stereo transmission circuit and a transmission antenna, and a reception circuit. Consists of a receiving antenna, FM receiving circuit, phase-locked loop stereo decoder, microphone amplification circuit, selection switch and amplification circuit.

The transmitting circuit and the receiving circuit have a transmitting antenna and a receiving antenna between them as a signal transmission interface. One end of the selection switch of the transmitting circuit is connected to a telephone signal coupling circuit, a microphone amplification circuit and a signal matching network, respectively. The other end of the selection switch is connected to the stereo transmission circuit and the transmission antenna, and one end of the selection switch in the reception circuit is connected to the reception antenna, the FM reception circuit, and the phase-locked loop stereo decoder. One selection term is connected to the microphone and the microphone amplifier circuit, the other end of the selection switch is connected to the output terminal of the amplifier circuit, and one is connected between the phase-locked loop stereo decoder of the reception circuit and the microphone amplification circuit. Two automatic volume control circuits and a bass boost circuit are provided.

The transmitter circuit is provided with a selection switch therein, and is used for selection of sound collection of various functions.

The receiving circuit can receive the radio wave of the FM broadcasting station by its receiving antenna.

[0009]

[Action]

 The present invention comprises one transmission circuit and one automatic volume control circuit, and the transmission circuit includes a telephone signal combination circuit, a microphone amplification circuit, a signal matching network, a selection switch, a stereo transmission circuit and a transmission antenna, The receiving circuit is composed of a receiving antenna, an FM receiving circuit, a phase locked loop stereo decoder, a microphone amplifier circuit, a selection switch, and an amplifier circuit. Among them, the transmitting circuit and the receiving circuit use the internal transmitting antenna and the receiving antenna as a medium for signal transmission, and on the transmitting circuit, one end of the selection switch is connected to the telephone signal coupling circuit, the microphone amplification circuit, and the signal matching network, respectively. To select various sound collecting functions, and the other end of the selection switch is connected to one stereo transmission circuit and transmission antenna to achieve signal transmission, and the reception circuit portion receives one reception signal. The antenna receives the stereo FM signal transmitted by the transmitting circuit and the FM broadcasting station, and the receiving antenna is connected in order to the FM receiving circuit, the phase-locked loop stereo decoder and the selection switch, and another one of the selection switches. The selection item is connected to the microphone amplification circuit and is also a selection item for sound collection. The other end of the selection switch is the amplification item. It is connected to the road and is used by the user.In addition, an automatic volume control circuit and a high-pitched sound booster circuit are installed in the receiving circuit, and it also collects sound for long-distance sound volume and at the same time appropriately By adjusting the collected sound volume, it is possible to prevent harmful effects on the eardrum of the human body due to excessive sound volume.

[0010]

【Example】

 1 and 3 are a block circuit diagram and an electric circuit diagram in an embodiment of an oscillator circuit of the present invention. As shown in the figure, the transmission circuit includes a telephone signal coupling circuit 10, a microphone amplification circuit 11, a telephone antenna 100, a microphone 110, a signal matching network 12, a jack switch 120, a selection switch 13, a stereo transmission circuit 14 and a transmission circuit. It is composed of the antenna 15. One end of the selection switch 13 is connected to the telephone signal combination circuit 10, the microphone amplification circuit 11 and the signal conditioning network 12, and the telephone signal combination circuit 10 is connected to the telephone by the telephone antenna 100 to collect sound. In addition, the microphone amplification circuit 11 can be connected to one microphone 110 to take in external sound, the signal matching network 12 can be connected to one jack switch 120, and sound sources such as television, sound, and video can be obtained. , And at the same time, by selecting the selection switch 13 among the above-mentioned three parties, it is possible to select from different sound sources. The other end of the selection switch 13 is connected to the stereo transmission circuit 14 and the transmission antenna 15 to transmit a signal, and the operation of the transmission circuit performs the following three different operations after the selection switch 13 is selected. (1) When the telephone antenna 100 is connected to the telephone line end of the telephone, the DC voltage is eliminated through the telephone signal coupling circuit 10, and the voice signal coupling and the signal are matched according to the magnitude, and then the selection switch. The signal is switched via 13 and sent to the stereo transmission circuit 14, mixed with the left and right channel signals, further subjected to frequency modulation to form a high frequency signal, and then transmitted and transmitted from the transmission antenna 15. (2) When the microphone 110 picks up a loud voice in the outside world, after it is amplified by the second-class transistor through the microphone amplification circuit 14, it is transmitted to the stereo transmission circuit 14 through the selection selection of the selection switch 13. After mixing the left and right channel signals, the signal is further frequency-modulated to form a high frequency signal, which is then transmitted from the transmitting antenna 15. (3) When an external sound source signal (for example, television, sound, video, etc.) is received by the jack switch 120, the signal is input through the transmission signal line, and then the signal level magnitude is passed through the signal matching network 12. Is attenuated to an appropriate level, reaches the stereo transmission circuit 14 via the selection switch 13, and after mixing the left and right channel signals, it is further frequency-modulated to form a high-frequency signal and then transmitted from the transmission antenna 15. To transmit.

As shown in the block circuit diagram and the electric circuit diagram of the embodiment of the receiving circuit of the present invention of FIGS. 2 and 4, the receiving circuit of the present invention includes a receiving antenna 200, an FM receiving circuit 20, and a phase lock. It includes a loop stereo decoder 22, a microphone 210, a microphone amplifier circuit 21, a selection switch 23, an amplifier circuit 24, and a speaker 25. In addition, it is connected to one high and low tone enhancing circuit 27 and one automatic volume control circuit 28. The receiving circuit receives the signal transmitted by the transmitting circuit at the receiving antenna 200, receives the frequency of the FM broadcasting station, and also removes the radio wave outside the frequency range of the FM broadcasting station by the filter method, so that the sensitivity is high. Further, the FM receiving circuit 20 outputs an audio frequency signal after frequency mixing, medium frequency amplification, and detection. The audio frequency signal is converted into left and right stereo frequency signals by the phase lock loop stereo decoder 22, and the selection switch The sound is collected by the microphone 210 by the switching selection of 23 and the volume amplification of the amplifying circuit 24, and by switching the selection switch 23, the automatic volume control circuit 26 is released by the phase-locked loop stereo decoder 22. After filtering the DC signals of the left and right stereo frequency signals with the capacitor C1 of the circuit, the After filtered by over de D1, via D2 rectifies the capacitor C2, sends a level signal by Tiger Njisuta Q1, Q2 to the microphone amplifier circuit 21 controls the amplification I also have reached the desired automatic volume control. The high-and-low sound enhancement circuit 27 constitutes a high-pass type high-pass filter and a low-pass filter with the operational amplifiers P1 and P2, the capacitors C1 and C2, and the resistors R1 to R5. The treble and bass are enhanced so that the user can clearly hear a specific sound source.

[0012]

[Effect of device]

 The sound collector of the present invention exhibits the effect of the sound collector sufficiently by the combination of both the transmitting circuit and the receiving circuit, and at the same time, obtains an extremely good sound collecting effect without being restricted by the distance. Moreover, the safety of protecting the human body is also considered, and it is practical.

[Brief description of drawings]

FIG. 1 is a block circuit diagram of an oscillator circuit according to an embodiment of the present invention.

FIG. 2 is a block circuit diagram of a receiving circuit according to an embodiment of the present invention.

FIG. 3 is an electric circuit diagram of an oscillator circuit according to an embodiment of the present invention.

FIG. 4 is an electric circuit diagram of a receiver circuit according to an embodiment of the present invention.

[Explanation of symbols]

10 ... Telephone signal coupling circuit 100 ... Telephone antenna 11 ... Microphone amplification circuit 110 ... Microphone 12 ... Signal matching network 120 ... Jack switch 13 ... Selection switch 14 ... Stereo Amplifying circuit 15 ... Transmitting antenna 20 ... FM receiving circuit 200 ... Receiving antenna 21 ... Microphone amplifying circuit 210 ... Selection switch 22 ... Phase lock loop stereo decoder 2
3 ... Selection switch 24 ... Amplification circuit 25 ... Speaker 26 ... Automatic volume control circuit 27 ... High-pitched sound boost circuit C1, C2 ... Capacitors D1, D2 ... Diodes Q1, Q2 ... Drain transistors P1, P2 ... Operational amplifiers R1, R2, R3, R4, R5 ... Resistors

Claims (3)

[Scope of utility model registration request] 1. A transmission circuit and a reception circuit are included, and the transmission circuit is a telephone signal coupling circuit, a microphone amplification circuit,
It includes a signal matching network, a selection switch, a stereo transmission circuit and a transmission antenna, and the reception circuit is composed of a reception antenna, an FM reception circuit, a phase locked loop stereo decoder, a microphone amplification circuit, a selection switch and an amplification circuit. The transmission circuit and the reception circuit use the transmission antenna and the reception antenna between them as a signal transmission interface, and one end of the selection switch of the transmission circuit is connected to the telephone signal coupling circuit, the microphone amplification circuit and the signal matching network, respectively, and selected. The other end of the switch is connected to the stereo transmission circuit and the transmission antenna, and one end of the selection switch in the reception circuit is connected to the reception antenna, the FM reception circuit and the phase locked loop stereo decoder, and the other selection item is the microphone. And microphone amplification times Connect to the road,
The other end of the selection switch is connected to the output end of the amplification circuit, and one automatic volume control circuit and high-low tone boost circuit are provided between the phase-locked loop stereo decoder of the reception circuit and the microphone amplification circuit. vessel. 2. The sound collector according to claim 1, wherein the transmitting circuit is provided with a selection switch therein, and is used for selection of sound collecting of various functions. 3. The sound collector according to claim 1, wherein the receiving circuit can receive the radio wave of the FM broadcasting station by its receiving antenna.