JPS5932225A - Power saving type multiplexer circuit - Google Patents

Abstract

PURPOSE:To improve the power saving and the reliability of a photocoupler, by dividing the photocouplers into plural groups and, providing a control photocoupler selecting the group. CONSTITUTION:The plural photocouplers PC 1-8 are provided in response to the plural number of input information from an external device 11. These photocouplers are divided into an optional number, e.g., 2, to form two groups. One end of the photocouplers of each group is used in common and connected in series with the corresponding control photocouplers PC10, 11. Only when inputs IN1-8 are closed and a control signal is applied to the control photocouplers PC10, 11, the corresponding group is selected and an output is generated. In such a constitution, the power saving is attained, the life of the photocouplers is made longer and the reliability is improved.

Description

[Detailed description of the invention]

<1) Description of the technical field to which the invention pertains The present invention relates to a digital input circuit in a data processing system.
In particular, the present invention relates to a power-saving multi-graxer circuit for digital signal input. (2) Description of the prior art This type of insulation type digital signal input circuit using a conventional photocoupler has a circuit configuration as shown in diagram tR1, and as long as the input circuits INI to INS of the external device H are closed, manual input is required. A current always flows through the photocoupler diode, which increases consumption ηf and power, which requires a large power source, and the life of the photocoupler is relatively short. In addition, in order to provide a multiplexer function to the photocoupler connection method shown in Fig. 1, a separate multiplexer is required, which requires a large number of parts υ, increases cost, and reduces Mt reliability. It also had the disadvantage of being low. (3) Detailed Description of the Invention The present invention has been made in order to eliminate the disadvantages of the upper MWJ inherent in the prior art.Therefore, an object of the present invention is to reduce power consumption and to provide a photocoupler. It is an object of the present invention to provide a new multiplexer circuit that can improve the reliability of the circuit and can be constructed at low cost by reducing the number of parts. (4) Structure of the Invention In order to achieve the objective stated above, the circuit for power-type multiplexing of the power supply 11 according to the present invention corresponds to a plurality of input 11V signals from the 1151F4. We set up a photocabra for P Kai, and asked if it was applicable. Divide J several photocouplers into an arbitrary number to form an arbitrary number of photocoupler groups, and connect one end of the photocoupler in each photocoupler group to the corresponding control photocoupler. Connected to the column, the input is closed and only when a control signal is applied to the control photocoupler (above) corresponding to the first photocoupler is selected and each of those photocoupler outputs are generated. +1 is made. (5) Detailed Description of the Invention Next, in order to better understand the present invention, the present invention is described in detail below. 7! Regarding the example, please refer to all the drawings and specifically explain R.
)1. Let's clarify. In 2nd bacterium, one embodiment of the present invention is shown - J゛Circuit configuration 1
It is 1. In the figure, reference numeral 11 indicates the outer casing.
The external device has multiple input circuits (contacts).
IN, 1 to IN8 are crossed.

[2] shows a multiplexer circuit which is the ten essential parts of the present invention, and the multiplexer circuit includes input circuits INI, IN2, IN3, I
N4, IN5, IN6, IN"/, provided corresponding to INK/ξnomet cuff 7 Pct, PC2, 1
'C-3, PC4, PC5, P(, "(i, 1."C
7. PCB and photo coupler] Control photo coupler that controls 'C1 to IICB 1) Includes CIO, pcll, 't(1, d1', (r bow), etc.). Input amount Ml't ], Ni to INB correspond to the photocoupler 1) C1 to PCB's No 2 (Todaimade's -r
, jjj (In case of unfaithfulness, C('', cathode
llll) are respectively followed by J&. The first coupler group P(:1~)) COt, J is divided into an arbitrary number of groups to form the first coupler group 7). 1) C1~
PCB has two groups I) C1~PC4, PC5~P
CBVCC1 to PCBVC・This number can be set arbitrarily. Photocoupler 1) 01 to PC4 1st
The other ends (kl, anode side in this example) of each of the groups of 7 are connected to each other through resistors.
The 17th continuation of U tsubo from to, its connection point is 71111 no.
4 Tokabu 5 PCIO (if applicable) is connected to the In column (=1) emitter of the transistor). 7 Metocoupler PC5 ~ PCB 2 (each of 12 groups 7 editions 1 I 2 Id - other end of the board (this implementation (IIJ V (-Oideshi 1 Anode II! I+) only J L ill;
J'+i,'L is connected in common, and the connection point is controlled pHl 7metokafun1) cii, (for example, t,
The emitter of the L-blade 1 transistor) K [connected to the column J1' is shown. Each photocoupler 1) C1 to 1) CQ's emitter of the fluorotransistor is connected in common,
About the collector t'1, Kumetkanra PC1 and PC5
is common to the output □U'1'l J)! Continuation fL, same (in hand, 7 A1-Cabra 1.'C2 and J'CG force output (J
IJi'2 tlc, / Tokagura PC3 and 11
C7 outputs OtJ i' :3,] Canola PC4 on the side
Dope8 is the output OU +4, -it -L're]1 high i
JL has a layer of silk. Seimachi 1 photocoupler pc, 1
o and pCt+ 7th edition transdisk collector', commonly connected CTIE, 1Fjf Jsk(1"('
: Ll and t. Photocoupler I] Cio and PC
One end of the photori iode of ll (J/, 1,'Anotro l!I in 111 examples of this ability) tJ,' 4:l
(, through the resistor L QI'; y+h K connection -J
It, claw 1 Kabra Peto's 7 i, ri, f odes, and 9iM (b sword side in this example) are control human power ψ
11 C0Ni" 1, the other end (actual) (r, h in the example) of the photocoupler PCII: /
)' 1llll) ItLfli1dayill Person/J Terminal〇ON1'21(C, I, ゛shi1, zo I L
J3'2 Continued I 1. TZ>. Next, regarding the operation [To be happy, the input amount is now h + 8 IN
J ~ INS key closed 1', Te also control fall person'JJ
%J T-C0NT L, CON'v2 does not have the suppression 11 signal applied at level 1! In case of contact,) 1st cuff'up
Since c+o and pctx are in the 6off position, a current flows in the photocoupler (C1 to F) C8, and the output terminal (
&;I: III force does not hit IIJT1~OU'l'4. However, the input circuits IN, 1 to . rN8. +,
(Closed 1. l'J-tsu system an input terminal 7- (:'O
When the NT IK control signal is applied and 7'; 141%, 1.
Well, the control photocoupler pC10 becomes 6-on' state,
-t-, the first photocoupler group (Pci~
))) Electricity i'il (flows into the photodiode of C4),
Therefore, the output) is the selected first photocoupler groove (PCJ).
~I) The output by C4) hits. Input circuit I
N1~INS closes 1. [1 person controlling 1 person) A control signal was applied to J1 pancreat C0NT2. ”When it is 0, the control force 117 me]・Cabra p(:+t becomes “on” state kq, and as a result Jlj,, 7 of ass 2's nometo couple plug loose (PC5-PCB): t l tie S-1゛?
tf,? ff, ga? ilC No. 1, pf 7), output terminal □tJi'1~(river'I゛4)
7 Metokagura group (PC5~))C8), the output is issued i)-no. In addition, 11 human power u4 children C0Ni' l, C(-
) Ni'2 A U input circuit 1. N 1~T, N
Fl changes to 1 state 11.1 as shown in the type chart in Figure 3. ~(-)T
J'l'ti1'EI No. 1n as shown in Figure 3 is issued/-
1- Do. In the above example, the input circuit is 81.
This is for the case where the human power is 81 units and the output is 21 units, 11 yen, the input is 161 factors, and the output is 8 units, 4 fl/, l, 2 units, 11 yen, etc. 1rl k
Set any combination of ? Of course, U Kokoto;
-(Reni I-i', r and Tsume;・Kabura, control r111
) It is clear that the number of the first kabula also changes. (6) Invention 9:b:'I! Explanation of: The present invention is constructed and operates as follows.According to the present invention, even if the input circuit is closed, the corresponding function 1) No current flows through the cover, and the control 11 (No. 1 Since the circuit f1 through which current flows is formed only when the photocoupler corresponding to the photocoupler 1 enters the ON state, the circuit f1 is formed.
In addition, it is possible to increase power consumption, extend the life of the photocoupler, improve reliability, and furthermore, it is possible to configure the 1Tt deviation to be small. Furthermore, according to the present invention, the multiplexer function can be implemented with a simple circuit configuration without using a separate multiplexer circuit as in the past, and the number of parts can be reduced. Not only does it have the effect of reducing the amount of energy by as much as 11 times, but it also contributes to improving (i4 reliability) and reducing (nM・
A multiplexer circuit with high Cl property and high stability can be manufactured for 1 out of 11 costs.

[Brief explanation of drawings]

Figure 1 shows this 1'ITi circuit +
FIG. 2 is a circuit diagram showing an embodiment of the multiplexer according to the present invention, and FIG. 3 is a diagram showing an operation type booyaert. , 12'... Manorechi pre-cri {45 human power circuits with surface, 1
3..1●Multiple breaker circuit, IN 1~INS-
... Input circuit, 1) C1~PCB-●◆Fume1・Kabra, l'Cl(1~・PC river...●Control follo・Cabra special I etc. Push
Entered Patent Attorney Notani J [ii Dairo 11-

Claims (1)

[Claims] A plurality of photocouplers are provided in response to a plurality of pieces of input information from an external device, and the plurality of photocouplers to B are divided into arbitrary groups to form an arbitrary number of photocoupler groups. One end of each first coupler in the photocoupler loop is connected in series to the corresponding control photocoupler, and it responds only when the control signal 11 is applied to the front t4Q control 7 metcoupler. 0111 A power-saving single-power multi-graxer circuit for digital input information, characterized in that a photocoupler's flag is selected and an output is generated from each of the photocouplers.