KR960015128B1 - Control circuit of network - Google Patents

Abstract

In a connection circuit which the voice signal of a handset 103 is transferred to a communication line 1-n wherein two line are a couple of the communication line through a communication circuit 102 in a CPU 101, a communication circuit 102, and a handset 103, the circuit comprises: an accessing trans 201 for transferring a voice signal transmitted from communication circuit 102 into the communication line 1-n; analog switches (SW1-SW4) for respectively connecting the accessing trans to the communication line 1-n which two line are a couple of the communication line; and a control signal stage (CTRL1-CTRL4) for simultaneously switching one among the analog switches (SW1-SW4) according to the control signal generated from the CPU 101, and controlling in order to connect the line with the related communication line.

Description

Call line control circuit

1 is a schematic diagram of a currency in a conventional multi-family house management and unmanned security system.

FIG. 2 is a specific circuit diagram of the first through n-channel connection sections 104-106 of FIG.

3 is a circuit diagram according to an embodiment of the present invention.

The present invention relates to a call line control method in a multi-family house and unmanned security system, and more particularly, to a call line control circuit capable of improving a bus-type call route.

Multi-family housing management and unmanned security systems are becoming more popular with the development of housing culture.

In the past, the control room (guard room) to households were wired in the STAR method so that only one generation could be in charge of one line. Therefore, as the number of generations increases, the connection configuration becomes more complicated and the number of rotations increases, which causes a lot of wiring / piping costs.

The recent method that solves the problem has been reduced to the burden of installing the wiring / piping by changing the form of the bus system for the previous generation to share the line with a limited number of lines as shown in FIG.

However, although the call line is shared by a limited line, there is a problem that a separate circuit must be configured between each other.

In particular, generational devices are becoming smaller, simplified, and simplified, and the market share of low-cost models is increasing.

Looking at an example of a conventional bus-line connection with reference to Figures 1 and 2, the central processing unit 101 controls the call circuit 102, the first to n call connection portion to the call circuit 102 It is configured to make a call between other households and the guard room through this. The control of the call line is performed by the central processing unit 101 controlling the first to n call path connecting units 104 to 106 through the call circuit 102.

At least one of the first to nth call path connecting portions 104 to 106 conducts the transistor Q1 when the call circuit 102 is controlled by the central processing unit 101, and when the relay Ry is driven, the relay The contact point of the switch SW is converted and connected to the corresponding call path, and the matching path 201, the relay Ry, the switch SW, and the transistor Q1 must be essentially configured. There is this.

Accordingly, an object of the present invention is to provide a circuit capable of reducing costs and miniaturizing a system by varying a communication path connection method so as to minimize the number of matching transformers configured in each communication path connection part and to remove a relay part and a transistor.

Another object of the present invention is to provide a circuit that can reduce the cost while maintaining the form of the bus system.

The present invention for performing the above object is characterized in that it is configured to be connected to the external communication line through the switched passage passing the voice output input and output from the handset in the bus communication circuit.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a circuit diagram according to an embodiment of the present invention. The present invention replaces each of the first through n-path connection portions 104 through 106 of FIG. 1 with CMOS analog switches SW1 through SW8. A matching transformer 201 is connected from the analog switches SW1 to SW8, and a pair of analog switches SW1 to SW8 are connected between the matching transformers 201 and 1 to n via a call. The analog switches SW1 to SW8 switch to transmit and receive voice signals by switching according to signals of the control signal terminals CTRL1 to CTRL4 generated from the call circuit 102. The control signal terminals CTRL1 to CTRL4 are controlled by the central processing unit 101. That is, the impedance that has passed through the communication circuit 102 is matched by the impedance of the matching transformer 201, and the voice signal matched by the matching transformer 201 is input to the analog switches SW1 to SW8. The analog switches SW1 to SW8 are normally open, but are turned on when transmitting and receiving a voice signal. For example, in the case of communication, first of all, the central processing unit 101 checks and finds a call line that is not currently being used for data communication with the guard room system. If a call is made with the guard room to occupy one of the unused call lines 1 to n, two of the analog switches SW1 to SW8 are controlled by one of the control signal stages CTRL1 to 4; Switch simultaneously. At this time, the two lines in these states are connected to the paired communication path and the paired switch. Accordingly, the voice signal passing through the call circuit 102 is transmitted to the call path through the analog switches SW1 to SW4, and the analog switches SW1 to SW4 are the control signal stages generated by the central processing unit 101. The contact is opened or shorted according to the control signals of CTRL1 to 4 so that the voice signal from the call circuit 102 is connected to the outside via the call path. The control signal of the control signal stages CTRL1 to CTRL4 generated by the central processing unit 101 is determined when the central processing unit 101 finds an unused communication path by checking a call path port (not shown). When a switch is authorized to make a call through the channel, the pair of switches are turned on so that the call can be made. When the voice is transmitted from the handset 103, the voice is controlled by the call circuit 102, and the adjusted voice signal is matched by an external matching transformer 201. In the normal state, the control signal stages CTRL1, CTRL2, CTRL3, ..., CTRL N do not operate.

However, during the data communication with the outside, that is, the household or another security room, when the signal for calling the device is received by the central processing unit 101 (when communicating with the other device in the device, the reverse order is performed). ) Signals to the control signal terminals (CTRL1 to CTRLN). If you want to talk with call 1, control signal is applied from CTRL1 to short the analog switches SW1 and SW2.If you want to talk with call 2, call control with CTRL2. A control signal is applied to short the analog switches SW3 and SW4. The analog switches SW1 to SW4 are open when the signal of the control signal stage CTRL is normally "low", and the analog switches SW1 to SW8 are on when the signal of the control signal CTRL is normally "low".

As described above, it is possible to reduce relays which are essentially configured for each communication path, and the matching transformer has an advantage of being shared as one. In addition, large components can be saved and replaced by CMOS ICs, which can provide a relaxed effect on the PCB component realities.

Claims (1)

In a system equipped with a central processing unit (101), a call circuit (102), and a handset (103), two lines are paired via a voice signal call circuit (102) of the handset (103) to a pair of calls. In a connection circuit for transmitting, a matching transformer 201 for matching a voice signal transmitted from the call circuit 102 to the call 1 through n, and a pair of the matching transformer 201 and two lines. Analog switches SW1 to SW4 connected to each one of the calls 1 to n, and analog switches SW1 constituted by the pair by control signals generated by the central processing unit 101. And a control signal stage (CTRL1 to CTRL4) for controlling one of the plurality of SW4) to be connected to the corresponding call path at the same time.