JP2547386B2 - Data accessory power supply - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device for a data auxiliary device such as a modem device connected to a data terminal device.

[0002]

2. Description of the Related Art A data device having a data terminal device for transmitting and receiving data signals and a data attachment device such as a modem device connected to the data terminal device by a plurality of data lines has been widely adopted. In such a data device, when the data attachment device is provided separately from the data terminal device, the power supply to the data attachment device uses a power supply separate from the data terminal device. For this power supply,
An electric wire for this purpose was drawn from a commercial power source and obtained by a power adapter, or a dedicated battery was attached to obtain this.

[0003]

In a device which requires a power source separate from the data terminal device, parts and labor for obtaining the power source are required. When using a commercial power supply, it is necessary to pull in the commercial power supply line, and when using a battery, complicated work such as charging and battery replacement is included, and the installation space for the battery and power adapter must be secured. There were various problems such as not being possible.

In view of the above problems, the present invention is a data attachment device which has a simple structure, is low in cost, does not require complicated labor, does not require a large space in the device, and can supply a stable power source. It is an object of the present invention to provide a power supply device.

[0005]

A power supply device for a data attachment device according to the present invention uses a voltage of a data signal sent from a data terminal device through a plurality of data lines to supply power to the data attachment device. is there. As its configuration, it is composed of a pickup circuit, first and second power storage capacitors, and a voltage transfer circuit. The pickup circuit takes out the voltage of (+) polarity and (-) polarity of the data signal sent through the data line, for each polarity. First,
The second power storage device is connected to each of the pickup circuits to charge the electric charges from the pickup circuits,
It is for outputting it. The voltage transfer circuit alternately repeats the voltages of the first and second power storage devices and transfers them to the second and first power storage devices, respectively.

[0006]

As described above, (+) and (-) of the data signal sent from the data terminal device by the pickup circuit.
A bipolar voltage is taken out and this electric charge is charged into the first and second power storage devices. The charges of both power supply capacitors alternately pass through the other voltage transfer circuit to repeat the transfer of charges of both power supply capacitors to equalize the voltage values of both power supply capacitors. As a result, the power supply device can supply a voltage having a stable voltage value to the data attachment device.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to an embodiment shown in the drawings. FIG. 1 is a schematic configuration circuit diagram of a power supply device of a data attachment device and its connection according to the present invention. A data terminal device 1 is connected to a data attachment device 2 such as a modem by a plurality of data lines 3. The data line 3 has uses such as transmission and reception of a data signal, but here, a data transmission line and a ground line are used. Reference numeral 4 denotes a power supply device for the data attachment device, which supplies the data attachment device 2 with (+), (−), and the ground voltage G.

The power supply device 4 of the data attachment device includes the following circuits and devices. C1 and C2 are power storage capacitors, which are output capacitors, respectively connected to pickup circuits 5 and 6 described later. The connection with the first power storage capacitor C1 is (+) V, and the connection with the second power storage capacitor C2 is (-) V
, And the ground point G is displayed at each connection point. 5,6
Is a pickup circuit connected in parallel to each line of the data line 3, and the first pickup circuit 5 is a forward diode D.
1, D2, D3 circuits collect the voltages of the multiple lines and connect them to the (+) pole of the power storage capacitor C1, and the second pickup circuit 6 collects the voltages of the multiple lines by the reverse diode D4, D5, D6 circuits. Then, the power storage capacitors C1 and C2 are connected to the (-) pole of the power storage capacitor C2 to charge the power storage capacitors C1 and C2, respectively.

Voltage transfer circuits 7 and 8 are controlled by an output cycle from an oscillation circuit 11 which will be described later to repeat charging and discharging, and the voltages of the first and second power storage capacitors C1 and C2.
They are for transferring to the other second and first power storage capacitors C2 and C1. Due to this transition, the voltage values of both power storage capacitors C1 and C2 are made equal. Voltage transfer circuit 7,
8 is connected to switching circuits 9 and 10 which will be described later, and in addition to capacitors C3 and C4 that charge and discharge the transition voltage to relay, diodes D7 and D8 and capacitors C3, which are respectively connected to the ground G from the capacitors C3 and C4. C4
From the diode D9, which are connected to the opposite polarities respectively,
It is composed of D10.

Switching circuits 9 and 10 control switching of the charging / discharging circuits of the capacitors C3 and C4 of the voltage transfer circuits 7 and 8, respectively. The switching circuit 9 is composed of an N-type channel field effect transistor FET1 and a P-type channel FET2, and the switching circuit 10 is N-type.
It is composed of a type channel FET 3 and a P type channel FET 4. The sources of FET1 and FET4 are connected to the (+) pole of the power storage capacitor C1 and the (−) pole of the power storage capacitor C2, respectively, and the drains of FET1 and FET2, FET3 and FET4 are connected to each other, and FE
The sources of T2 and FET3 are connected to each other. 11
Is an oscillating circuit for controlling the switching operation of each FET, and is a known pulse oscillating circuit 555I / C which oscillates at a cycle of a time constant of the resistors R1 and R2 and the capacitor C5.
Etc., and the output thereof is connected to the gates of the FETs of the switching circuits 9 and 10. Zener diode V
S is for stabilizing the voltage of the power storage capacitors C1, C2.

The power supply device 4 of the data attachment device according to the present invention is configured as described above, and its operation will be described below. (+) Polarity sent from the data terminal device 1 to the data attachment device 2 through the plurality of data lines 3,
The data signal including both the (−) polarity is distributed to the voltages of the (+) polarity and the (−) polarity by the pickup circuits 5 and 6 to charge the power storage capacitors C1 and C2. Oscillation circuit 1
1 operates by the voltage of the power storage capacitors C1 and C2 and oscillates, and alternately converts the gate voltage of each FET into (+) polarity and (-) polarity according to the output cycle. Each FET of the switching circuits 9 and 10 indicates an on / off state depending on its channel type and the polarity of the applied voltage.

When the output of the oscillation circuit 11 becomes the (-) pole,
The FET1 and FET3 of the switching circuits 9 and 10 are turned on. When the FET1 is turned on, the (+) pole and the G pole of the power storage capacitor C1 pass through the drain / source of the turned-on FET1 and the diode D7, respectively, and the (+) pole and (-) pole of the storage capacitor C3 of the voltage transfer circuit 7 Being connected to the pole, the capacitor C3 is charged by the charge of the power capacitor C1. On the other hand, when the FET3 is turned on, the capacitor C
The (+) pole of 4 is connected to the power storage capacitor C through the diode D10.
FET turned on at the (+) pole of 1 and at the (-) pole
It is connected to the G pole of the power storage capacitor C1 through a drain source of 3 and forms a circuit for charging the power storage capacitor C1 by the charge of the power storage C4.

Next, when the output of the oscillation circuit 11 changes to the (+) pole, the FET1 and FET3 are turned off and the FET is turned off.
2 and FET4 are turned on. When the FET2 is turned on, as described above, the voltage of the (+) pole of the power storage capacitor C3 charged by the charge of the power storage capacitor C1 is passed through the FET2 to the G pole of the power storage capacitor C2, and the voltage of the (−) pole is the diode D9. Is applied to the (−) pole of the power storage device C2 through
The power storage device C2 is charged by the charge of the power storage device C3, and has a voltage value equal to that of the power storage device C1. On the other hand, when the FET 4 is turned on, as in the case of the FET 1, the (−) pole and the G pole of the power storage capacitor C2 are respectively turned on by the drain / source of the FET 4 and the diode D8 of the storage capacitor C4 (of the voltage transfer circuit 8). Since it is connected to the (-) pole and the (+) pole, the electricity storage device C4 is charged by the electric charge of the power supply electricity storage device C2.

As described above, the voltage transfer circuits 7 and 8 are charged from the corresponding power storage capacitors C1 and C2 and discharged toward the power storage capacitors C2 and C1 having the other polarities. By such a transfer operation, the voltage values of the power storage capacitors C1 and C2 are made equal. Since such a transfer operation is continuously repeated in small increments in the output cycle of the oscillation circuit 11, the voltage values of the power storage capacitors C1 and C2 become sufficiently equal and stable (+) V, as the power supply of the data attachment device 2. G pole,
Supply a voltage of (-) V. Although the oscillation circuit 11 is used in the embodiment, it may be used if it is a circuit device having a function of alternately performing on / off. Further, this power supply device is limited in the electric power obtained from the data signal, and therefore it is necessary to select the data attachment device in consideration of this point.

[0015]

According to the present invention, which has the above-mentioned structure, the voltage is taken out by utilizing the data signal from the data line inside the data device. Therefore, it becomes a power supply device of a data attachment device having an extremely simple structure, and a power supply device that can be provided at low cost. Further, there is no need to pull the electric wire from the commercial power source, and no complicated work such as battery replacement when a battery is used occurs. Further, there is no problem of securing a space for installing a battery or an adapter in the data attachment device. In general, there is no requirement that the voltages extracted from the data signal sent to the data line have the same polarity on both sides, and therefore, there is no guarantee that the voltages charged on both power storage capacitors are also equal, but even in this case, the voltage transfer circuit can Since the voltage values of the power storage devices are made equal, it is possible to supply a power supply having a stable voltage value.

[Brief description of drawings]

FIG. 1 is a schematic configuration circuit diagram of a power supply device of a data attachment device and its connection according to the present invention.

[Explanation of symbols]

 1 Data Terminal Device 2 Data Attachment Device 3 Data Line 4 Power Supply Device for Data Attachment Device 5 First Pickup Circuit 6 Second Pickup Circuit 7 First Voltage Transfer Circuit 8 Second Voltage Transfer Circuit 9 First Switching Circuit 10 Second Switching Circuit 11 Oscillation Circuit C1 First Power Storage Battery C2 Second Power Storage Battery

Claims (1)

(57) [Claims] 1. A power supply device for a data accessory device such as a modem device, which is connected to a data terminal device such as a personal computer by a plurality of data lines, wherein the data signal (+ ) Polarity, (-)
Pickup circuits for extracting polar voltage for each polarity and first and second circuits connected to the pickup circuit for charging and outputting the voltage from the pickup circuit.
The voltage extracted from the data signal of the data line, which is composed of a second power storage capacitor and a voltage transfer circuit that alternately transfers the voltages of the first and second power storage capacitors to the second and first power storage capacitors, respectively. To charge each of the above-mentioned power storage devices and repeatedly charge and discharge the other power storage devices by the operation of the voltage transfer circuit to equalize the voltage value of each power storage device and supply power to the data accessory device. A power supply device for a data accessory device.