KR100572681B1 - Circuit for duplex amplifying and transmitting control signal - Google Patents

Abstract

The present invention relates to a control signal transmission circuit for transmitting a control signal for controlling the connection units of the conference system, in particular a control signal for controlling the operation of the connection unit in a conference system in which a plurality of units are connected in parallel to a single signal transmission cable By allowing amplification and transmission in both directions through the control signal line, attenuation of the control signal can be prevented to accurately control a plurality of connected units connected in parallel, and a plurality of connected units connected in parallel using a single signal transmission cable can be obtained. It provides a control signal bidirectional amplification transmission circuit that can easily build a conference system that can be controlled accurately in both directions.

Parallel connection, Conference system, Signal transmission cable, Single line, Control signal, Bidirectional, Amplification transmission

Description

Control signal bidirectional amplification transmission circuit {CIRCUIT FOR DUPLEX AMPLIFYING AND TRANSMITTING CONTROL SIGNAL}             

1 is a block diagram of an infinite unit parallel coupled conference system according to the present invention designed to enable bidirectional amplification transmission of a control signal through a signal transmission cable having a single control signal line;

Figure 2 is a block diagram of a microphone unit according to the present invention designed to enable amplification transmission in both directions through a single line of the signal transmission cable in the infinite unit parallel combination conference system of FIG.

3 is a detailed circuit diagram of a control signal processor according to the present invention designed to amplify and transmit a control signal in both directions through a single line of a signal transmission cable in the microphone unit of FIG. 2;

4 is a detailed circuit diagram of a control signal bidirectional amplification transmission circuit according to the present invention constituting the control signal processor of FIG.

Explanation of symbols on the main parts of the drawings

100: main controller 200: microphone unit

210: MCU 220: voice processing unit

230: control signal processor 231, 236: switching transistor

232, 235: diodes 233, 234: amplifying transistors

240: key input unit 250: display unit

260: microphone 270, 280: signal transmission cable connection jack

300: signal transmission cable 310, 320: signal transmission cable plug

The present invention relates to a control signal transmission circuit for transmitting a control signal for controlling the connection units of the conference system, in particular a control signal for controlling the operation of the connection unit in a conference system in which a plurality of units are connected in parallel to a single signal transmission cable By allowing amplification and transmission in both directions through the control signal line, attenuation of the control signal can be prevented to accurately control the multiple connection units connected in parallel, and multiple connections connected in parallel using a single line signal transmission cable. The present invention relates to a control signal bidirectional amplification transmission circuit that can easily construct a conference system that can accurately control units in both directions.

The control signal bidirectional amplification transmission circuit according to the present invention is implemented in an internal circuit of a plurality of microphone units connected in parallel with a signal transmission cable when a conference system is installed, and a control signal among the signal transmission lines constituting the signal transmission cable. The control signals transmitted through the transmission line can be amplified in both directions in the allocated single line to be transmitted.

Generally speaking, a conference system refers to a microphone sound system that facilitates a conference. There are many types of conference systems, depending on the purpose of use, the method of meeting, and the quality of the conference. Many units will be installed.

As shown in FIG. 1, the conference system includes a plurality of microphone units 200 for a plurality of participants, a chairman microphone for conducting a conference, and a main controller 100 for controlling the system as a whole.

In addition, the conference system controls the plurality of microphone units 200 and controls between the main controller 100 and the plurality of microphone units 200 to amplify the voice input from the microphone of the microphone unit 200. Signal transmission cable 300 of various forms for signal and voice signal transmission is connected.

Accordingly, the conventional conference system constitutes a basic system that connects the number of microphone units and the table stand to the number of conference participants, and connects all the microphone units to the mixer and the amplifier through a signal transmission cable, thereby allowing the operator to Various functions are provided, such as adjusting or adjusting the output level of the amplifier, turning on or off the entire microphone unit or a specific microphone unit.

Appropriate technology for constructing a conference system having various functions for proceeding such a conference and to which a plurality of microphone units are connected is described in Utility Model Registration Nos. 321695 and 321696 filed by the applicant of the present invention and entitled to such a conference system. It is.

The conference system according to the technology described in the utility model registrations allows a simple network configuration to connect finite and infinite parallel input loads, such as a microphone unit, without reducing the gain of the voice signal.

The conference system according to the above technique normally transmits a voice signal without deterioration of gain when finite or infinite parallel connection of input loads is performed. However, the control signal generated to control a plurality of microphone units connected in parallel in the main controller or the chairman microphone unit is weakened as the number of the microphone units connected in parallel increases, so that the control function can be properly performed. The problem arises that there is no.

In order to solve this problem, conventionally, by increasing the input voltage of the control signal generated in the conference system, or by forming an amplifier such as a photo coupler using a transistor, a phototransistor or a photodiode for each microphone unit, the control signal Was used to amplify.

However, the conventional signal transmission cable for transmitting the audio signal and the control signal transmits the control signal in both directions by allocating one transmission line to each control signal, so that an amplification element that performs a simple amplification operation is used. When amplifying the control signal, the control signal cannot be amplified and transmitted in both directions.

In addition, there are limitations to increase the input voltage of the control signal generated in the conference system, and there are many inefficient parts.

Accordingly, a circuit capable of amplifying and transmitting a control signal bidirectionally through a single control signal line provided by a signal transmission cable while using a conventional signal transmission cable in a conference system in which microphone units are connected in infinite parallel is desired.

Accordingly, an object of the present invention for solving the above problems is a control signal bidirectional capable of amplifying and transmitting a control signal for controlling a plurality of microphone units connected in parallel in a conference system in both directions through a single control signal line of a signal transmission cable. To provide an amplification transmission circuit.

In order to achieve the above object, the present invention provides a conference system in which a plurality of microphone units are connected in parallel through a signal transmission cable composed of a single control signal line.

A forward control signal amplifying unit for amplifying a forward control signal input through a first signal transmission cable connection jack provided at one side of the microphone unit, and outputting it through the second signal transmission cable connection jack;

A reverse control signal amplifying unit for amplifying a reverse control signal input through a second signal transmission cable connection jack provided on the other side of the microphone unit and outputting it through the first signal transmission cable connection jack;

If the forward control signal amplified by the forward control signal amplified by the forward control signal amplified by the reverse control signal amplification unit to return to some of the forward control signal, when the input of the reverse control signal, if there is already input forward control signal, the reverse direction A reverse control signal switching unit for grounding the control signal;

A reverse control signal blocking unit which passes the forward control signal and blocks an input reverse control signal;

Of the reverse control signal amplified by the reverse control signal amplifying unit, the reverse control signal returned to the forward control signal amplifying unit is grounded, and when the forward control signal is input, if there is a previously input reverse control signal, the forward direction A forward control signal switching unit for grounding the control signal;

A forward control signal blocking unit which passes the reverse control signal and blocks an input forward control signal;

It provides a control signal bi-directional amplification transmission circuit, characterized in that consisting of; a power supply for supplying operating power to each component.

In this case, in the control signal bi-directional amplification transmission circuit according to the present invention, the forward control signal amplifying unit is any one of a two-stage inverting amplifier, a two-stage transistor, a photo coupler for amplifying and outputting the forward control signal in the same phase as the input phase. Implemented,

The reverse control signal amplifier may be implemented by any one of a two-stage inverting amplifier, a two-stage transistor, and a photo coupler for amplifying and outputting the reverse control signal in the same phase as the input phase.

In addition, in the control signal bidirectional amplification transmission circuit according to the present invention, the reverse control signal switching unit is implemented as a transistor that operates in accordance with the forward control signal output from the forward control signal amplifying unit,

The forward control signal switching unit may be implemented with a transistor that operates according to a reverse control signal output from the reverse control signal amplifying unit.

In addition, in the control signal bidirectional amplification transmission circuit according to the present invention, the forward control signal blocking unit is a diode connected to the output terminal of the forward control signal amplification unit and the positive terminal, the negative terminal is connected to the second signal transmission cable connection jack Implemented,

The reverse control signal blocking unit may be implemented as a diode connected to the output terminal of the reverse control signal amplifying unit and a plus terminal, and the negative terminal is connected to the first signal transmission cable connection jack.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same components have the same reference numerals as much as possible even if they are displayed on different drawings. Detailed descriptions of well-known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention will be omitted.

1 is a block diagram of an infinite unit parallel coupled conference system according to the present invention designed to enable bidirectional amplification transmission of a control signal through a signal transmission cable having a single control signal line, as shown in FIG. It is composed of a microphone unit 200 and the signal transmission cable (300).

2 is a block diagram of a microphone unit according to the present invention designed to enable amplification transmission of a control signal in both directions through a single line of a signal transmission cable in the infinite unit parallel combination conference system of FIG. The signal transmission cable 300 is connected to the signal transmission cable connection jacks 270 and 280 provided between the main controller 100 and the microphone units 200.

As shown in FIG. 2, the microphone unit 200 includes a MCU (Multi Control Unit, 14-bit microprocessor) 210, a voice processor 220, a control signal processor 230, a key inputter 240, and a display unit. And a microphone 260.

The MCU 210 receives an electrical signal applied from the key input unit 240 and a voice signal and a control signal applied from the voice processor 220 and the control signal processor 230, and performs a corresponding operation according to the control signal. The signal transmission cables 270 and 280 and the display unit 250 transmit corresponding voice signals and control signals.

The key input unit 240 includes a plurality of key buttons including an ON / OFF switch of the microphone unit 200, and generates an electric signal in response to a user's key input through the key button.

The display unit 250 output LED, microphone unit 200 ON LED, RESET LED, etc. so that the user can visually recognize the state of the microphone unit 200 in response to the electrical signal generated from the key input unit 240 It consists of.

The voice processor 220 processes the voice signal applied from the microphone 260 according to a predetermined standard.

On the other hand, the signal transmission cable 300 is coupled to the plurality of microphone units 200 and the neighboring microphone unit 200 and the main controller 100 of the plurality of microphone units 200, the plurality of It provides a transmission line for transmitting / receiving a voice signal and a control signal between the microphone unit 200 and the main controller 100 of the.

As shown in FIG. 2, the signal transmission cable 300 includes a power supply line (PIN 6), a control signal line (PIN 1, 2, 3), a data signal line (PIN 4) and a voice signal line (PIN 7). , 9) and D-SUB 9-pin ferrous connector (MALE) 310 and yaw-type connector (FEMALE) 320, respectively, for accommodating ground lines (PIN 5, 8) simultaneously Equipped.

As the same signal transmission cable 300 is used between the main controller 100 and the microphone unit 200, in constructing a conference system in which a plurality of microphone units 200 according to the present invention are coupled in parallel, very fast and It is easy to install and easy to maintain.

In addition, by applying the control signal bi-directional amplification transmission circuit according to the present invention, a single control signal line (PIN 1: COUNTER OVER, PIN 2: CONTROL, PIN 3: ALL OFF) for transmitting different control signals in both directions Since the control signal can be amplified and transmitted, it is possible to take advantage of the installation and maintenance of the conventional signal transmission cable 300 as described above.

3 and 4, the control signal bi-directional amplification transmission circuit according to the present invention will be described in detail.

3 is a detailed circuit diagram of a control signal processor according to the present invention designed to amplify and transmit a control signal in both directions through a single line of a signal transmission cable in the microphone unit of FIG. 2, and FIG. 4 is a control signal processor of FIG. 3. A detailed circuit diagram of a control signal bidirectional amplification transmission circuit according to the present invention.

As shown in FIG. 3, the control signal processor 230 amplifies and transmits different control signals in both directions through a single control signal line (PIN 1: COUNTER OVER, PIN 2: CONTROL, PIN 3: ALL OFF). Each control signal bidirectional amplification transmission circuit is provided.

The control signal bidirectional amplification transmission circuit 230 according to the present invention may be classified into a forward / reverse control signal switching unit, a forward / reverse control signal amplifying unit, a forward / reverse blocking unit, and a power supply unit according to its function.

In addition, the control signal bidirectional amplification transmission circuit is shown in Figure 4 of the present invention, as shown in Figure 4, a plurality of resistors (R1-R7), transistors 231, 233, 234, 236 and diodes (232, 235) Although implemented, this is a preferred embodiment according to the present invention, it is well known that other embodiments can be replaced by another device that can perform the same function performed by each device.

In particular, the forward control signal amplifier 233 may be implemented by any one of a two-stage inverting amplifier, a two-stage transistor, and a photo coupler that amplify and output the forward control signal in the same phase as the input phase. The reverse control signal amplifier 234 may also be implemented as any one of a two-stage inverting amplifier, a two-stage transistor, and a photo coupler that amplify and output the reverse control signal in the same phase as the input phase.

As shown in FIG. 4, the reverse control signal switching unit is preferably implemented as a transistor 236. The reverse control signal switching unit is turned on / off under the control of the forward control signal S1 amplified and output from the forward control signal amplifier 233. Is off.

The transistor 236 is turned on according to the control of the amplified forward control signal S1 of n2, so that a partial forward control signal returned during the output of the forward control signal S1 is the reverse control signal amplifier 234. Ground to prevent input.

In addition, when the reverse control signal S2 is generated after the forward control signal S1 is input, the transistor 236 is turned on according to the amplified forward control signal S1 of n2, and the late reverse control signal S2 is input late. Ground.

That is, when the reverse control signal S2 is input, the reverse control signal switching unit grounds the reverse control signal S2 according to the control of the previously input forward control signal S1 when the forward control signal S1 is input.

In addition, the forward control signal switching unit is preferably implemented as a transistor 231, as shown in Figure 4, in accordance with the control of the reverse control signal S2 amplified and output from the reverse control signal amplifier 234. It is turned on / off.

The transistor 236 is turned on under the control of the amplified reverse control signal S2 of n1, and the reverse control signal amplifying unit 233 receives some reverse control signals returned in the process of outputting the reverse control signal S2. Ground to prevent input.

In addition, when the forward control signal S1 is generated after the reverse control signal S2 is input, the transistor 231 is turned on according to the amplified reverse control signal S2 of n1, and the late forward control signal S1 is input late. Ground.

That is, when the forward control signal switching unit receives the forward control signal S1 for controlling the microphone unit 200 through the first signal transmission cable connection jack 270 provided on one side of the microphone unit 200, If there is a reverse control signal S2 for controlling the microphone unit 200 previously inputted through the second signal transmission cable connection jack 280 provided on the other side of the microphone unit 200, the reverse control signal S2 previously inputted. According to the control of the forward control signal S1 is grounded.

When the forward control signal S1 is input, the forward control signal amplifying unit 233 amplifies the forward control signal S1 when there is no input backward control signal S2 and through the second signal transmission cable connection jack. In order to amplify and output the control signal inputted in order to perform the function of outputting the same phase as the input phase, it is amplified by the npn type first transistor, and the collector output signal of the npn type first transistor is the base of the pnp type second transistor. It is desirable to implement a two-stage transistor amplifier that is applied as an input signal and amplified.

On the other hand, the forward control signal amplifier may be implemented as an optical coupler consisting of an LED (LED) for emitting light according to the input control signal, and a phototransistor for converting the optical signal of the LED into a current signal, and amplifies and outputs the current signal. .

In addition, when the reverse control signal S2 is input, the reverse control signal amplifying unit amplifies the reverse control signal S2 when there is no previously inputted forward control signal S1, and then converts the first signal transmission cable connection jack 270 into the reverse signal. It performs a function to output through, and is implemented as a two-stage transistor amplifier or optical coupler in the same way as the forward control signal amplifier.

The reverse control signal blocking unit performs a function of blocking the reverse control signal S2 when the forward control signal S1 is input and then receiving the reverse control signal S2 and applying the reverse control signal S2 to the reverse control signal switching unit. 235 or a transistor is preferable.

In addition, the forward control signal blocking unit after the reverse control signal S2 is input, if there is an input of the forward control signal S1, in order to perform the function of blocking the forward control signal S1 and applying it to the forward control signal switching unit, It is implemented with a diode 232 or a transistor.

As described above, the control signal bidirectional amplification transmission circuit according to the present invention is a control signal transmitted to control the system through the existing single control signal line even in the infinite parallel connection of a plurality of microphone units constituting the conference system By amplifying and transmitting in both directions, the conferencing system can be easily constructed, and the system can be controlled accurately.

On the other hand, in the detailed description of the present invention has been described with reference to specific embodiments, of course, various modifications are possible without departing from the scope of the invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention enables amplification and transmission of a control signal for controlling the operation of the connection units in both directions through a single control signal line of the signal transmission cable in a conference system in which a plurality of units are connected in parallel, thereby attenuating the control signal. There is an effect that can accurately control a plurality of connection units connected in parallel by preventing the.

In addition, the present invention has the effect that it is easy to build a conference system that can accurately control a plurality of parallel connected units in both directions using a conventional signal transmission cable.

In addition, the present invention, even if the microphone unit is connected in parallel in the conference system, it is easy to control the entire conference system, can easily build the conference system without the installation of a new cable, there is an effect that can easily use the function. .

Claims (7)

In a conference system in which a plurality of microphone units are connected in parallel through a signal transmission cable composed of a single control signal line, A forward control signal amplifying unit for amplifying a forward control signal input through a first signal transmission cable connection jack provided at one side of the microphone unit, and outputting it through the second signal transmission cable connection jack; A reverse control signal amplifying unit for amplifying a reverse control signal input through a second signal transmission cable connection jack provided on the other side of the microphone unit and outputting it through the first signal transmission cable connection jack; If the forward control signal amplified by the forward control signal amplified by the forward control signal amplified by the reverse control signal amplification unit to return to some of the forward control signal, when the input of the reverse control signal, if there is already input forward control signal, the reverse direction A reverse control signal switching unit for grounding the control signal; A reverse control signal blocking unit which passes the forward control signal and blocks an input reverse control signal; Of the reverse control signal amplified by the reverse control signal amplifying unit, the reverse control signal returned to the forward control signal amplifying unit is grounded, and when the forward control signal is input, if there is a previously input reverse control signal, the forward direction A forward control signal switching unit for grounding the control signal; A forward control signal blocking unit which passes the reverse control signal and blocks an input forward control signal; Control signal bi-directional amplification transmission circuit, characterized in that consisting of; a power supply for supplying operating power to each component. The method of claim 1, wherein the forward control signal amplifier, And a two-stage inverting amplifier, a two-stage transistor, and a photo coupler for amplifying and outputting the forward control signal in the same phase as the input phase. The method of claim 1 or 2, wherein the reverse control signal amplifier, And a two-stage inverting amplifier, a two-stage transistor, and a photo coupler for amplifying and outputting the reverse control signal in the same phase as the input phase. The method of claim 1, wherein the reverse control signal switching unit, Control signal bi-directional amplification transmission circuit, characterized in that implemented as a transistor that operates in accordance with the forward control signal output from the forward control signal amplifier. The method of claim 1 or 4, wherein the forward control signal switching unit, Control signal bidirectional amplification transmission circuit, characterized in that the transistor is implemented in accordance with the reverse control signal output from the reverse control signal amplifier. The method of claim 1, wherein the forward control signal blocking unit, A control signal bidirectional amplification transmission circuit, characterized in that the output terminal of the forward control signal amplifier and the plus terminal is connected, the negative terminal is implemented with a diode connected to the second signal transmission cable connection jack. The method of claim 1 or 6, wherein the reverse control signal blocking unit, A control signal bidirectional amplification transmission circuit, characterized in that the output terminal of the reverse control signal amplifier and the plus terminal is connected, the negative terminal is implemented with a diode connected to the first signal transmission cable connection jack.

Images