JPS6339394A - Capacitive coupling feeding-transmission and reception system information card - Google Patents

Abstract

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

Description

Detailed Description of the Invention (Industrial Application Field) This defense is based on the following:
ce Automation, OA), Fax l~
IJ --Δ--Tomation Actory Out
OmatiOll, to r) I used in fields such as
Information cards such as C cards, especially those related to non-power supply (no built-in battery) and non-contact type capacitive coupling power supply/transmission/reception type information cards that do not have contact type terminals for power supply d3 and human output of signals are required. .

(Prior Art) A general news card has an integrated circuit such as a semiconductor memory built into a card body such as a Plus Deck, and a contact terminal for connecting to an external device is provided on the card surface.

Conventionally, technologies in this field include ■Nikkei Mechanical, (1985-10-21) Nikkei McGraw-Hill Company [I
C Card JP, 167-170, ■Nikkei Electronics, (1985-12-2>Nikkei McGraw-Hill Co., Ltd.
■Electronics manufacturers pouring into the c-card market (Part 1) JP, 275-292, ■Nikkei Electronics, (1985-12-6) Nikkei McGraw-Hill RFC
Electronics manufacturers pouring into the card market (Part 2) AP, 249-262, ■ Utsukai 56-10916
6 @ Was there something that was mentioned in the official bulletin? The configuration will be explained below using figures.

FIG. 2 is a block diagram showing an example of the configuration of a conventional information card, and FIG. 3 is a perspective view showing an example of its implementation.

In FIG. 2, 1 is an external device for reading and writing information, 2 is an information card, and a DC power source is connected from the external device 1 to the information card 2. , E is supplied, and
Between the external device 1 and the information card 2, the output signal l1
01 to I10 n is exchanged.

As shown in FIGS. 2 and 3, an information card 2 (including a rectangular card body 3 made of plastic or the like,
The card body 3 has a power supply and O
- A plurality of contact type terminals (4) are installed for the terminal, and an electronic integrated circuit (hereinafter referred to as IC) 51f%' is installed inside.
) is being kicked. The IC 5 has a semiconductor memory 6 and a microprocessor 7 that writes information to the memory 6.

When this type of information card 1-''2 is inserted into the external device 1, it contacts the terminal 4 on the card 2 side or the terminal on the external device 1 side, and connects the terminal 4 through these terminals 4, etc. The stored information is read by the external device 1, or the information from the external device 1 is read and written into the memory 6.

(Problem to be solved by the invention) However, in the information card with the above structure, since the terminal 4 is exposed to the outside, contact failure or leakage may occur due to dirt, oxidation, corrosion, wear, etc. of the terminal contact area. There were problems with reliability, such as malfunctions due to current, and destruction of the IC5 due to static electricity or external voltage.

In order to eliminate this problem, a non-contact type system is developed in which the terminal 4 is not exposed on the surface of the card body 30 and the battery, oscillator, loop antenna, etc. are built into the card body 3, and the signal is sent from the loop antenna using the battery. An information card has also been proposed, and problems such as the card body 3 becoming thicker due to battery attachment and battery replacement may occur.

The present invention has problems that the prior art had, such as low reliability, thickening of the card due to battery installation,
The present invention provides an information card using a capacitive coupling power supply/transmission/reception method that solves the inconvenience of battery replacement.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides information reading,
Alternatively, in an information card that performs reading and writing, a pair of capacitive coupling square plates receives external AC power and sends and receives signals to and from the outside, and separates the AC power and signals input through this plate. a transmitter/receiver circuit that converts the original AC power and signal into the original AC power and a signal, and sends a transmission signal to the electrode plate; a memory that stores information; The transmitting/receiving circuit l\memory control circuit N for providing one signal for transmission is housed in the card body.

(Function) According to the present invention, since the information car 1' is configured as described above, the pair of () plates can receive and receive AC power and send and receive output signals between the external device and the external device without contact. The transmitting and receiving circuit converts AC power from the electrode plate into DC power and supplies it to the internal circuit, and also transmits signals at different frequencies and impedance changes. Irises? i now. As a result, it is possible to send and receive the number without contact or without power supply. Therefore, the above-mentioned problem can be eliminated.

(Embodiment) FIG. 1 is a block diagram showing the configuration of an information card using a capacitive coupling power supply/transmission/reception method showing an embodiment of the present invention.

In FIG. 1, 10 is an external device, and an information card 20 is inserted into this external device 10.

The external device 10 has a transmitting/receiving circuit 11 and a pair of re-coupling plates 12-1 and 12-2 for both power transmission and signal transmission. The transmitting/receiving circuit 11 receives power and input signal Sj
is converted into a transmission signal and applied to the electrode plate 12-1,
The output signal S is obtained by demodulating the transmission signal applied through the electrode plate 12-1, which has a different frequency band or has undergone a change in impedance. This is a circuit that sends out. here,
One pole plate 12-2 is grounded and forms a retrace loop.

On the other hand, the information card 20 has a substantially rectangular card body 21 made of plastic or the like.
1 (, t, polar plate 12-1.12- on the external device 10 side
A pair of capacitive couplings (Φ temporary 22-1. The transmitter/receiver circuit 24, memory control circuit 25, and memory 26 connected to the board ??-1 are connected.

Transmitting/receiving circuit? 4 separates the AC power and the signal valve from the transmission signal input through the board 22-1, converts the AC power into a stabilized DC voltage Vdc, and supplies it to each circuit in the IC 23 as a power source. At the same time, the signal valve is converted into the original signal Si and sent to the memory control circuit 25, and further the output signal MS of the memory control circuit 25 is sent.

Tell '＞! This circuit converts the signal into an A signal and supplies it to the electrode plate 22-1. Here, one pole plate 22-2 is grounded and forms a retrace loop. Memory control circuit 25 (U,
For example, it consists of a microprocessor 1) and a memory 26.
This is a circuit that performs readout and interrupt control, serial/parallel conversion of data, etc. The memory 26 is a medium for storing various types of information, and includes a read-only memory (ROO12, replenishable ROH(PRO)l), electrical erasing/writing;
It is composed of 7-nokawa ROH (EEPRO)l), ROH that can be erased by ultraviolet rays and can be infiltrated (El"ROH), etc.

4 and 5 are plan views showing an example of mounting the information card 20 in FIG. 1. In the information card 20 shown in FIG. 4, the electrode plates 22-1 and 22-2 in the - row are arranged in the long side direction and embedded in the card body 21. Further, in the information card 20 shown in FIG. 5, a pair of electrode plates 22-1 and 22-2 are arranged in the short side direction and embedded in the card body 21.

Corresponding to each of these electrode plates 22-1.22-2, each electrode plate 12-1.12-2 on the external device 10 side is also arranged in the same manner.

Next, the operation will be explained.

The input signal Sj to the external device 10 is input to the information card 2.
Initial cells 1 to 1 of the memory control circuit 25 on the 0 side
(initial setting), control signals for reading and writing information, signals to be roughly written to memory 2G, etc. serially (serial)
It is something that has become

When the information cars i-2() are inserted into such an external device 10, the AC power and input signal Si on the external device 10 side are converted into transmission signals by the transmitting/receiving circuit 11, and the polar plates 12-1.
12-2.22-1.22-2 is transmitted to the transmitting/receiving circuit 24 on the information card 20 side.

The transmitter/receiver circuit 24 separates the output of the electrode plate 22-1 into AC power and a signal valve, and then transforms the AC power into a stabilized DC voltage\'
The signal Si is converted to DC and supplied to each circuit in the card body 21 as a power source, and the signal from the signal valve is converted to the original signal Si and provided to the memory control circuit 25.

Then, the memory control circuit 25C' receives the input signal Sj
After specifying an address based on the information contained in -C, for example write information, and writing information into the memory 26, a write completion signal is given to the transmitting/receiving circuit 24. Transmission/reception circuit 2
4 converts the output signal of the memory control circuit 25 into a transmission signal and sends it to the electrode plate 22-1.22-2゜12-1.12-
2 to the transmitting/receiving circuit 11 on the external device 10 side.

The transmitting/receiving circuit 11 converts the applied transmission signal into the original signal, and outputs a serialized output signal S including read information of the memory 26, information power-1 to internal operation confirmation signal, etc. Send out.

FIGS. 6, 7, and 8 show specific configuration examples of the circuit shown in FIG.
ipleXTtransmission system
, hereinafter referred to as the ``Kaitsuren method'', uses the FDM duplex communication method to transmit power and send and receive communications.

In the circuit shown in FIG. 6, the transmitting/receiving circuit 11 on the external device 10 side, the oscillating circuit 11-1 that outputs AC power at frequency f, and the transmitting circuit that converts the input signal S into a signal for transmission at frequency f. Circuit 11-2, frequency f.

Output signal S for transmission. Receiving circuit 11- converts into
3, and frequencies f, , f are applied to the electrode plate 12-1 to obtain the frequency f. It is composed of a filter 1-4 which receives from an electrode plate 12-1. In addition, the transmitting/receiving circuit 24 on the information card 20 side
is filter 24-1, power supply circuit 24-2, reception circuit 2
4-3, and a transmitting circuit 24-4.

In the above configuration, on the external device 10 side, the oscillation circuit 11
-1 outputs AC power with frequency f and filter 1-
4 and electrode plates 12-1.12-2.22-1.22-2 to the information card 20 side. Similarly, the transmitting circuit 11
-2 converts the input signal S into a transmission signal of frequency f, and sends it to the filter 1-4 and the electrode plates 12-1, 12-2.
22-1 and 22-2 to the information card 20 side.

On the information card 20 side, after the output of the electrode plate 22-1 is separated into AC power of frequency f and a transmission signal of frequency 11 by the filter 24-1, the AC power is sent to the power supply circuit 2.
4-2, it is converted to a stabilized DC voltage Vdc and sent to the IC.
It is supplied to each circuit in 23. Further, the transmission signal having the frequency f is converted into the original signal Si by the receiving circuit 24-3 and is then provided to the memory control circuit 25. The memory control circuit 25 reads out information in the memory 26, for example, based on the signal @Si. The read information is transmitted at frequency f by the transmitting circuit 24-4. The signal is converted into a transmission signal and transmitted to the external device 10 side through the filter 24-1 and the electrode plates 22-1, 22-2, 12-1 and 12-2.

``Frequency f'' transmitted to the electrode plate 12-1 on the external device 10 side
The transmission signal is separated from other signals by a filter 1-4, and then converted into the original signal So by a receiving circuit 11-3. □ The circuit shown in Figure 7 has a configuration in which the output (",) of the oscillation circuit 11-1 in Figure 6 is also used as the output (f) of the transmitting circuit 11-2, and two functions are used for power supply and transmission and reception. frequency f
,,f. It will be held in

In the circuit of FIG. 8, filters 11-4.
A specific example of 24-1 is shown. The filter 1-4 on the external device 10 side includes a tuned circuit consisting of a coil L1 and a combiner C1 connected in parallel to the output side of the transmitting circuit 11-2, and a coil L2 connected in parallel to the input side of the receiving circuit 11-3. And Coincer C? It consists of a tuned circuit consisting of: Similarly, the filter 24- on the information card 20 side
1 is a tuning circuit consisting of a coil 3 and a capacitor C3 connected in parallel to the input side of the power supply circuit 24-2, and a tuning circuit consisting of a coil 4 and a capacitor C4 connected in parallel to the output side of the transmitting circuit 24-4. It consists of a tuned circuit.

In the above configuration, 11. A tuned circuit consisting of CI has a tuning frequency f. The frequency f
. Check the transmission signal. Similarly, a tuned circuit consisting of [2°C2 receives a signal of frequency f·, and a tuned circuit consisting of 1-3°■C3 receives a signal of frequency f. The signal of L4°C
The tuned circuit consisting of 4 interrupts and stops the signal of frequency f. These fills 11-4.24-1 (
From this, the division of frequencies f, . . . fo is performed.

FIGS. 9 and 10 show other concrete configuration examples of the circuit shown in FIG. 1, in which power transmission and signal transmission and reception are performed using an impedance change detection type communication system.

Of these, in the circuit shown in FIG.
It consists of 12. In addition, an impedance circuit (7) 24-11 branch-connected to the transmission/reception circuit 24 +, , j:, and the electrode plate 24-1 on the information card 20 side, and this impedance circuit 24-11 connected to the earth or Switch circuit 24-12 for cutting and milling, electrode plate? ? -1 connected to the power supply circuit 24-13 and the receiving circuit 24-14
', and switch circuit? The operations 11-12 are controlled by the transmission circuits 24-15.

In the configuration on the first step, the transmitting circuit 11 on the C1 external device 10 side
-11 or when outputting AC power, it is 4 poles or 12-1
Information card 2 through ゜12-2.22-1.22-2
0 side power supply circuit 24-13, and its power supply circuit 2
4-13 'C:'7i Converted to a constant DC voltage\'dc.The input signal S1 on the external device 10 side is frequency modulated with a constant amplitude or phase modulated by the transmitting circuit 11-11, and then , electrode plate 12-1.12-2.22-1.
22-2 to the receiving circuit 24-1 on the information card 20 side.
4, the signal is converted to the original signal and supplied to the memory control circuit 25.

Transmission circuit 24-1 by the output signal of memory control circuit 25
5 or controlling the operation of the switch circuit 2412, the electrode plate?
? Since the impedance circuit 24-11 connected to -1 is connected to or disconnected from the earth, the amplitude of the output signal of the transmitting circuit 11-11 changes. If this amplitude change is detected by the receiving circuit 11-12, an output signal S is obtained. or can be obtained.

The circuit shown in FIG. 9 above is an example of full-duplex communication, or half-duplex communication is also possible. When transmitting from the information card 20 in half-duplex communication,
If an unmodulated signal is sent from the transmitting circuit 1.1-11 of the external device 10 and the connection of the impedance circuit 24-11 to the earth is turned on and off, the amplitude will change (not the output, but the frequency change). , phase changes can also be detected.

FIG. 10 is a circuit that further embodies the circuit shown in FIG. 9, and shows an example of the circuit when performing full-duplex communication using a method of detecting amplitude changes. In this circuit, the impedance circuit 24-11 or the resistor 1 (Z and the capacitor C7), the switch circuit 24-12 is a diode, and the transmitter circuit 24-
Each of the circuits is composed of 15 switches 1 to 51 circuits. By switch 1~live circuit, tie 'A-1-
By biasing the impedance circuit 24-11 in the forward and reverse directions and turning on and off the connection state of the impedance circuit 24-11 to the earth, changes in amplitude can be detected.

Each of the above embodiments has the following advantages.

■ The internal circuit terminals are not exposed to the outside as in the past,
Since power supply, signal input, and output can be performed without contact, there is no possibility of poor contact due to dirt, oxidation, corrosion, wear, etc. of the terminal contact area as in the past. Furthermore, not only is there no failure or malfunction due to leakage current, but there is no need to protect the internal circuitry from external electric charges or static electricity. Therefore, the trust level is 1 or 1 [7].

■ Completely sealed structure improves explosion-proof and waterproof properties. Therefore, in addition to normal OA equipment and FA equipment,
It can also be applied to equipment installed in locations that require explosion-proof measures due to adverse environments.

■ Since there is no built-in battery, there is no need to replace the battery, and the installation of the battery can be done by simply installing the battery in the car 1 - body 21.
Too thin. Additionally, it can be expected to have a longer lifespan than conventional solar cells with built-in solar cells.

Note that the present invention (J) is not limited to the embodiment shown in FIG.
It is also possible to modify the internal circuit configuration to other types such as a hybrid system.

(Effects of the Invention) As described above in detail, according to the present invention, the input of power supply and the output of signals are performed through a pair of capacitive coupling plates that are not exposed to the outside. This can prevent poor contact with the device, malfunctions due to leakage current, and damage to internal circuits due to static electricity or external voltage.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of the configuration of an information card using a quantity-coupled power feeding/transmission/reception method showing an embodiment of the present invention, Fig. 2 is a block diagram of a conventional information card, and Fig. 3 shows an implementation example of Fig. 2. A perspective view, FIGS. 4 and 5 are plan views showing the implementation example of FIG. 1,
Figures 6, 7, and 8 [FD that embodies Figure 1]
FIGS. 9 and 10 are circuit diagrams showing a configuration example of an M full-duplex communication system. FIGS. 9 and 10 are circuit diagrams showing a configuration example of an impedance change detection type communication system that embodies FIG. 10... External device, 11.24... Transmitting/receiving circuit, 12-1゜12-2.22-1.22-2.
... Pole plate, 20 ... Information card, 21.
...Card body, 23...IC125.
...Memory control circuit, 26...Memory.

Claims (6)

[Claims] 1. A pair of capacitive coupling plates that receive external AC power and send and receive signals to and from the outside, and separate the AC power and signals that are input through these plates and convert them into the original AC power and signals. and a transmitting/receiving circuit for transmitting a transmission signal to the electrode plate; a memory for storing information; and controlling the operation of the memory based on the signal inputted through the transmitting/receiving circuit; What is claimed is: 1. An information card using a capacitively coupled power supply/transmission/reception method, characterized in that a memory control circuit that provides a signal is accommodated within the card body. 2. The transmission/reception circuit includes a filter circuit that separates three frequencies, a power supply circuit that converts the AC power separated by the filter circuit into DC power, and a reception circuit that converts the signal separated by the filter circuit into the original signal. The capacitively coupled power feeding device according to claim 1, which is configured of a circuit and a transmitting circuit that supplies a transmitting signal having a unique frequency to the filter circuit.
Send/receive method information card. 3. The transmission/reception circuit includes an impedance circuit connected to the electrode plate, a switch circuit for connecting or disconnecting the impedance circuit to the electrode plate, and a power source for converting AC power input through the electrode plate into DC power. The capacitively coupled power supply system according to claim 1, comprising a circuit, a receiving circuit that converts a signal input through the electrode plate into the original signal, and a transmitting circuit that controls the operation of the switch circuit. Send/receive method information card. 4. 3. An information card using a capacitively coupled power supply/transmission/reception system as claimed in claim 2, wherein said filter circuit is constituted by a filter circuit that separates two frequencies. 5. 5. The information card according to claim 4, wherein the filter circuit includes a coil and a capacitor. 6. 4. The information card according to claim 3, wherein the impedance circuit is a resistor and a capacitor, the switch circuit is a diode, and the transmitter circuit is a switch drive circuit.