JPS6212331A - Automatic power source closing system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (1) Technical field to which the invention pertains The present invention relates to power supplies for equipment connected to telephone lines or general communication lines other than telephones, such as facsimile, teletext, data input/output terminals, and video terminals. This relates to an automatic power-on method that automatically turns on the power.

(2) Conventional technology There are many types of devices that connect to communication lines, but in the case of record-keeping terminals, many models that can automatically receive data when the operator is not present are in widespread use, especially for facsimile machines. Automatic reception is possible in most cases. In order to perform automatic reception, one of two methods is adopted: either all the power of the device is turned on at all times, or only the pre-power is turned on at all times, and the main power is turned on only during communication. Among these, the former method of always turning on the power supply is undesirable from the viewpoint of energy saving because power is supplied to the control circuit of the device even when there is no communication, and power is constantly consumed. Therefore, the latter method using a pre-power source is common.

Figure 4 shows an example of a conventional automatic power-on circuit for equipment. In Figure 9, 1 is the line control circuit, 2 is the electric circuit inside the equipment, 3 is the pre-power supply, 4 is the main power supply, and 5 is the fuse. ,6
is a plug. FIG. 4 shows an example of a device connected to a telephone line, such as a facsimile machine, and a nine-line control circuit 1 performs line connection control and call signal detection. When a calling signal is input to input terminals LN1 and LN2 of the telephone line, the first line control circuit 1 detects the calling signal and outputs a power-on signal POW.
Output ON and turn on the main power. Thereafter, the two lines are connected to the electric circuit 2 to start 9 communications.

FIG. 5 shows an example of a calling signal detecting section in the line control circuit 1, where 7 is a 400 Hz removal circuit and 8 is a 16 Hz detection power counter circuit. The calling signal on the telephone line is a 16 Hz intermittent signal modulated at 400 Hz, and by detecting 16b in the 16 Hz detection power counter circuit 8, it is possible to detect that there are two incoming calls.

Here, the line control circuit 1 that detects the calling signal uses a logic element such as a counter that requires power supply, and is constantly supplied with power by the pre-power supply 3 in order to constantly monitor the presence or absence of the calling signal.

In this way, conventional equipment uses a pre-power supply to detect a call signal, so it has the advantage that power consumption during standby is relatively small compared to a system in which the main power supply 4 is always on. It has the following drawbacks. That is, (i)
Due to the power consumption by the pre-power supply, the power consumption for a long time during standby cannot be ignored. (ii) It is necessary to separately prepare a pre-power supply for constantly supplying power to the calling signal detection section, separate from the main power supply or within the main power supply, and the power supply circuit becomes large and expensive.

(3) Purpose of the invention The object of the invention is to operate without using a pre-power supply.

An object of the present invention is to provide an automatic power-on method that can automatically power on devices.

(4) Structure of the Invention (4-1) Features of the Invention and Differences from the Prior Art In the present invention, the device is automatically powered on directly using the energy of the ringing signal from the 9 lines without using a pre-power source. Its main feature is to

Therefore, it differs from the conventional technology in the following points. That is,
(i) No pre-power supply is used; (ii) Power is turned on using the energy of the call signal from the communication line.

(ii+) A logic circuit such as a 16Hz detection circuit is not used as a method of detecting a calling signal.

In other words, in the conventional technology, a logic circuit such as a counter is used to generate the call signal, and a pre-power source is required. The device is set to turn on automatically. Therefore, in the present invention, power consumption during standby can be reduced to zero or almost zero.

The power supply can be made smaller and more economical by eliminating the need for a pre-power supply.

(4-2) Embodiment FIGS. 1 and 2 are block diagrams of an embodiment of the present invention, in which 9 is a line control circuit, 10 is a calling signal detection circuit, 11 is a power source, 12 is a relay switch, and 13 is a block diagram of an embodiment of the present invention. 14 is a coil, 14 is a switch, 15 is a smoothing capacitor, 16 is a coupling capacitor, and 17 is a rectifier diode.

The switch in the line control circuit 9 is in standby mode, that is, when the power supply 1
When 1 is off, it is in contact with the telephone side (TLI, TL2). The call signal is LNI.

When the calling signal arrives at LN2, the calling signal detecting circuit 1
0 operates the relay 12 and turns on the power supply 11. Here, the detection circuit 10 and the relay 12 are constructed as shown in FIG. 2, and rectify and smooth the calling signal, drive the coil 13° in the relay 12, and turn on the switch 14. As shown in FIG. 3, the calling signal S1 is a 16 Hz signal modulated at 400 Hz that rings for 1 second and stops for 2 seconds, and the output of the detection circuit 10 has a waveform like S2. Therefore, it is desirable to turn on the power supply 11 during the on period of about 31 m5 of the 16 Hz signal. When the power supply 11 is turned on, the electric circuit 2 starts operating, and a power-on notification signal PO is sent.
W ACK is input to relay 12. This POW
The ACK signal is input to the coil 13 in the relay, and the switch 14 is turned on regardless of whether there is an input to the coil 13I.
The power source 11 is kept on. After the power supply 11 has been turned on in this way, by a command from the electrical circuit 2.

9 communication is started by switching the switch in the line control circuit 9 to the electric circuit 2 side. Furthermore, since the detection circuit 10 is separated from the first line together with the circuits to the telephone side (TLI, TL2), there is no adverse effect on the second communication. However, if the telephone handset is picked up while the line is connected to the telephone side (footer off), the call quality will deteriorate due to the ringing signal detection circuit 10. Therefore, in order to prevent this, a switch 18 shown in FIG. 1 is provided,
The ringing signal detection circuit 10 is connected to the telephone line TLI.

Just separate it from TL2. Note that the switch 18 also functions as an automatic reception prohibition switch, and when the switch 18 is off, the power is not turned on automatically and must be turned on manually.

By the way, in FIG. 1, the calling signal detection circuit 10 is TL
I, connected to TL2, but LNI.

It may be connected to LN2. However, in order to prevent waveform distortion, it is necessary to automatically turn off the switch 18 after the power is turned on, using, for example, a POW ACK signal. Further, as the switch 12, a transistor is used.

It is possible to use semiconductor elements such as solid state relays and Cyrisk. Further, in FIG. 1, switch 12 directly turns on AClooV 1/
Although off control is performed, the present invention is limited to this.
1, it is only necessary to insert the power supply 11 in a place where it can be controlled on/off. For example, if the power supply 11 is a switcher-regulator type, the switch 12 may control the operation of a PWM control section or an oscillation circuit section within the power supply.

Note that the calling signal detection circuit 10 is always functioning.

Automatic power-on may occur due to noise, etc., but communication does not start within a certain period of time.

The power may be automatically turned off by the POW OFF signal.

(5) As described in detail, according to the present invention, a pre-power supply is not required, so the power supply becomes compact and inexpensive, and the power consumption during non-communication, which was conventionally consumed by a pre-power supply, is reduced. There is an advantage that there is no

[Brief explanation of drawings]

1 and 2 are block diagrams of an embodiment of the present invention, FIG. 3 is a waveform diagram of a calling signal, FIG. 4 is a block diagram of an example of a conventional automatic power-on circuit, and FIG. 5 is a block diagram of a conventional automatic power-on circuit. 1 shows a block diagram of an example signal detection circuit. DESCRIPTION OF SYMBOLS 1... Line control circuit, 2... Electric circuit, 3... Pre-power supply, 4... Main power supply, 5... Fuse, 6...
··plug. 7... 40011z removal circuit, 8... 16Hz detection power counter circuit, 9... Line control circuit, 10... Calling signal detection circuit, 11... Power supply, 12... Relay switch, 13... ...Coil, 14...Switch, 15.
...Smoothing capacitor. 16... Coupling capacitor, 17... Rectifier diode, 18... Switch. Patent applicant: Nippon Telegraph and Telephone Corporation, patent attorney
Mori 1) Hiromitsu 2 m Procedure Juho Seisho (Method) November 28, 1985 Patent Application No. 150677 of 1985 72, Title of invention Automatic power-on method 3, Relationship with the amendment person case Patent application Address: 1-1-6 Uchisaiwai-cho, Chiyoda-ku, Tokyo Name (4
22) Nippon Telegraph and Telephone Corporation Representative Tsune Shinfuji 4, Agent

Claims (1)

[Claims] A communication line connection device that includes a device connected to a communication line and a power source for the device is provided with a power-on circuit that automatically turns on the power of the device by directly using the electrical energy of the call signal, and the device is connected to the device. An automatic power-on system characterized in that the call signal for the device is directly supplied to the power-on circuit, and the power-on circuit that receives the call signal applies the power to the device.