DE2129940C2 - Read-only memory - Google Patents

Description

³ _4th

-ueise a much larger number of trans- c _tr "» ··,

Ξ be sent with an interrogation pulse as SJK? ^ P ^ ¹ ^ ⁵ * ^^ ^Blocking "

Ξ be charged with an interrogation pulse as SJK? ^ P ^ ¹ ^ ⁵ * ^^ ^Blocking "

just "" windings are avoided, creating a total of one

¹⁰ There is now also a read-only memory for | ^{er in} 8 ^higher amperage than usual for the operation of the

So storage of information words known (see _e read-only memory is sufficient. To support this

German economic patent specification 67472), in which a ^ , ^{also the} interrogation lines in series

In the event that several information words are each switched to a c ^{blocking line}

«Are assigned to an ^appropriate interrogation line and in the case of test wine storage differs in four characteristics

which is also a single information word from the known fixed-

can be given. Here every transformer is ^w ! F ^s p ^eicner : First, there is only one blocking

provided with a blocking winding. There will be ¹⁰ ß ⁱⁿ each case> secondly, the ^{interrogation lines are}

at the same time with an interrogation pulse over those fu ^{so that} ₁ ^{m Re} * ^{e are} switched, third are in themselves

Sölkierwindungen belonging to transformers that are Jj £ 2? Short circuit switch> DT-AS 12 51 804)

Do you see affected by the information word to be queried T ^ J ** ^? - ^ ^{S m ie} * ^{ltmgS BIockier} -

Snd, a blocking pulse sent, the inserted one of the ma ^"lei ^ g Di ° to.

Wik d Abfi ⁵ ^ TT ^ f ^

Snd, a blocking impulse sent, one of the ma- "^

metic action of the interrogation pulse entgegen- ⁵ ^ TT ^ f ^ ,, ^features bnngen einergtt magnetic effect heft Di Bkk SS St invention concluded prevent

me gp ggen ^ TT ^ f ^ ,,

set magnetic effect. The Bk> k- SS Stn invention concluded prevent complications of Stigen to a group of Leseverstär-? £ ^ f ¹ 'S ^d ^ l ^ S ^e connected transformers are known properties remain respectively obtained in Eicher ^ f ^Festw erts _P. Accordingly, it is connected to a blocking line ₃₀ S? ^au _F ^{ch "Here} ™ ^{_4H Hllfe de} / Blocberwiddungen in The invention is based on the object of providing a ^pre} £ ™ £ ^{e married. mdert} > ^d f ^a f J ^uber . "Create ^v ° ^m queried Informatonswort loading Z. In addition to an enrichment of TeSSk ·" Transformers, some-like variation of such a read-only memory f ^he?!? ^ ⁰ ' ^d ' ^{e gle} ! F ^hC u ^S P ^a " ^now g ^s _f \ ^m P ^uIse 8 ^e " there is also the advantage that for the over the ItVS h ' T ^V ° rf * ^b f ^tro , ^ffenen ^ bear. Blocking coils to be sent in electricity a ge! "G _Q ^{Will do" nam} _t ^{hch either} 8 ^{"kei. Ne or} Sngere current is needed than usual. Se ER. ^S pannungs, m _P sleeve opposite Polantat go el""""lit Höht »; CKonfoiic" _Λ · r · ^ready - If only the voltage

⁰¹ W ⁸ ^ r aSdieS ^ n? f ^eme ? · ^{N 'in the} P ^richti g ^{s Polaiität sleeve} evaluated werdfn,

memory ^ ^S P ^ «™ 8 Y °° information _{words so} there is no need to switch off the sense amplifier or

^a - ^US> S ^ Ahf ΓΤ ^WOrt f ^jeWei i ^S short-circuit their inputs, in order to

iSÄa ^ ^3o Hfrt? τ ^received

vinTkirT t f ^ ^

overall induction of secondary windings _g ^ _{nauso ß as the Anzah which} Leseveretärkerfes

couples smd whereby transmitters are formed, ^ _earth j | _{yet only} requires _Sovie i switch 35 for switching the current blocking in which the individual bits emes information word as a query maximum Informationsbei feed line to a waste _{words a} common sense line associated interrogation pulse by means of the respective secondary _{is. The al} f _{number of these switches} f _is ⁸ _{0 w} | _sent Lich windings certain voltage induced iron _{k] of a} set _{as the number of} sense amplifiers _for vorzuter Polantat and excluded to sense amplifiers _see ligand additional switch. The input signals, which are divided into groups, can also be small here in each individual information word output at the 40 positions of the sense amplifiers

are kaiin and in which each transformer with an I _n of FIG. 1 shows a read-only memory which is provided with a blocking winding and a selection device which is essentially based on known technology and which is built at the same time as a device. In FIG. 2, an example of the er interrogation pulse is shown those blocking windings of a read-only memory according to the invention, in which one of the magnetic effects of the magnetic effect of the interrogation pulse is required to cause only a single blocking line to produce the opposite magnetic effect.

Allowed to send the Blockierioipuls, which are to be In the following, first in detail the to carriers belong, which are not from the information to be queried hand of the FIG. 1 shown variant explained. The mation word are concerned. This read-only memory 5 ° read-only memory there consists of twelve transformers is characterized according to the invention, Kl ... K 12, the cores of which are symbolized by horizontal lines that all blocking windings are in series on a single solid line. For interrogation blocking lines are connected, which serve in series with information words, the interrogation line and parallel connection of the interrogation lines is that A 1 ... A x, to which the interrogation switch Tl ... each group of the blocking windings connected to 55 Tx in series are. They each consist of a group of sense amplifiers connected to a transistor in an emitter circuit. By means of a short-circuit switch, the transient conducting control of such a transient is carried out and the interrogation pulse sent to a group of sense amplifiers is sent to the group of blocking resistors via the associated interrogation line. An interrogation line leads each hearing transformer a diode in series 6o is now connected to each of several primary windings from the blocking ^{pulse in forward transformers.} The interrogation line A 1 leads over the direction, on the other hand, by a voltage pulse induced by an interrogation primary windings P10, P 30 and P120 of the excess pulse in the reverse direction trager Kl, K3 and K 12. The adjacent interrogation is claimed. line, however, leads through the primary windings Because all blocking windings in series ⁶ 5 Pll, P21, P91 and P121 of the transformers K 1, K 2, are connected to a single blocking line, K 9 and K 12 are possible that the same current flows through all the blocks primary windings are in accordance with Inkierwicklungen and a multiplication of the formation in each case with certain a plurality of

Secondary windings are inductively coupled, whereby the transformers are each formed here in series with one of the transformers mentioned. This is how the blocking line is connected. The blocking primary winding PlO with the secondary winding 51, windings B11 ... B13, the transformer Kl ... K3 53 connected to the sense amplifier, the primary winding P30 with the secondary winding Ll ... L3 and the primary winding P120 with the secondary sin are connected in this way the blocking line Bl 1 winding 512 inductively coupled. For more Er, joined with the aid of the transistor TbI is fining for at first except that the _m can be fed it a blocking pulse. Blocking windings Bl are present. If the blocking windings B 41 .. .B 44 of the interrogation line A 1 connected to the interrogation line A 1 through the transient read amplifier L 9 ... L12, the transient conductive control of the transistor Γ1 with io carrier K 9 .. .K12 are connected in a corresponding manner When a query pulse is loaded, the blocking line B / 4 is connected, which with the help of secondary windings 51, 53 and 512 of the transistor Tb 4 induced there with a blocking pulse, voltage pulses of certain polarity can be sent to the read. This blocking pulse z. B. amplifiers Ll, L 3 and L12 are outputted as that is supplied when the sense line A1 occurs with a single bit of information words. _t5 interrogation pulse fed with the aid of the transistors. Each of the total provided read amplifiers L1 _w j _r d and if only to the read amplifiers Ll ... L 3 ... L12 is to be given to one of the secondary windings 51 ... _e in informational value. Such a 512 connected. Each of the secondary windings 51 blocking pulse is sent through all blocking lines ... 512 can induce with several primary windings except through the blocking line BIl. This be tively coupled, so that it has voltage representing bits, with the result that now when the voltage pulses are fed when various interrogation line A 1 is loaded with one interrogation pulse, it can only output interrogation lines with interrogation pulses. via the transformer Kl ... K 3 an information word. B. the secondary winding 51 can not only be outputted. From the secondary winding of the primary winding P10, but also to the primary winding P12 of the transformer K 12, no span winding P11 and two other voltage pulses shown can be supplied this time, since the magnetic primary windings are inductively coupled here. The read-vertical effects of the interrogation pulse and the stronger L1 ... L12 are now divided into groups, blocking pulses cancel each other out. In order to achieve this in each case with a single information word, primary windings and blocking are provided here. One of these groups comprises the read windings with opposite winding sense amplifiers Ll ... L 3, another of these groups 30 give away what, due to the opposite direction, comprises the read amplifiers L 9 ... L12. If, as already described, the horizontal lines indicating this winding direction, the interrogation line A1 is fixed with one of these windings. In addition, from interrogation pulse is loaded, so the group interrogation pulse and blocking pulse of the same size before sense amplifiers Ll ... L3 measure an information word. The blocking pulse also calls z. B. output whose individual bits are determined by the blocking winding B 41 on the secondary winding that a voltage pulse is generated at the sense amplifiers L1 and L3, this voltage pulse is output but not induced with the specific polarity, while no voltage pulse is output on the associated sense amplifiers, but rather with opposite polarity and has an effect - therefore it is not specified as one for an information word. At the same time, a voltage pulse is seen on the group of 40. In a corresponding manner, sense amplifiers L 9 ... L12 also provide information, the loading of the blocking winding word is output, the individual bits of which are B 42 and B 43. Overall, it is determined that the sense amplifiers that the sense amplifiers L 9 ... L12 no information-L12 induced voltage pulses of the specific mation word is fed. A special AbPolarity can be output while these sense amplifiers are connected to the circuit, therefore no other sense amplifiers belonging to this group are required here. Any voltage pulses associated with this are not output. All of these disadvantageous effects therefore do not occur here. At the same time, if there are no blocking windings, the result is that the blocking windings are provided and used. It is now possible, however, to achieve that when loading an interrogation line that only a single information of an interrogation line can be output with an interrogation pulse when an interrogation line is loaded. In place of the sense amplifiers L1 ... L3 assigned to this interrogation line, only a single one, for example the read deformation words, is output. stronger L 9 ... L12 an information word zuzufüh-this purpose, according to the invention, additional measures _re n, so is provided with feed of the sense line A 1 took, which, as already indicated, is 55 _m it made an interrogation pulse of the blocking line B U that each of the transformers Xl .. .K12 is not supplied with a blocking pulse, on the other hand a blocking winding is provided, namely with such a blocking pulse to the other blocking lines. This can be achieved by using an interrogation pulse that is sent via an interrogation line controlling the transistors inserted in the blocking lines, via those blocking windings, 60 transistors. In this way, even those belonging to transmitters that cannot be interrogated by the interrogation that are affected when the other information word is loaded, a blocking interrogation line with an interrogation pulse can be sent to which only one information word is output to one of the magnetic ones.
The example shown in FIG. 2 for the gnetic effect of the invention causes the result that actually 6s according to read-only memory differs voi only a single information word is output to the read-only memory shown in FIG. The blocking windings next in that the blocking windings connected to a group of sense amplifiers are connected together differently here. It is <

2 12S

here all blocking windings B11 ... B 44 connected in series to the single blocking line B1 , which in turn is in series with the interrogation lines A 1 ... A χ . As a result, an interrogation pulse acts as a blocking pulse at the same time. The direction of winding of the blocking windings and the polarity of the current flowing through them are also set up here in such a way that a magnetic effect opposite to the magnetic effect of the interrogation pulse is produced via a blocking winding. So that an information word can be output to one of the intended groups of sense amplifiers when an interrogation pulse is supplied, the blocking windings associated with the transformers connected there are short-circuited. The short-circuit switches or transistors TbI .. .Tb 4, through which such blocking windings can be bridged, are used for this purpose. The blocking windings BIl ... S13 can be bridged by the short-circuit switch TbI and the blocking lines B 41 ... B 44 can be bridged by the short-circuit switch Tb 4. Such a short circuit switch is closed when an information word is to be output to the associated group of sense amplifiers. B. the short-circuit switch Tb 1 is closed when an information word is to be output to the sense amplifiers Ll ... L3. As a result, the blocking pulse sent via the blocking line B / does not flow through these blocking windings because of the inductive resistance of the blocking windings BIl .. .B13, but instead via the bridging made by the short-circuit switch TbI. Accordingly, the delivery of an information word to the sense amplifiers Ll ... L3 is not prevented by this blocking pulse. However, the delivery of information words to the other read amplifiers, i.e. also to the read amplifiers L 9 ... L12, is prevented, since the blocking pulse is sent through all other blocking windings and there develops the same effects as already in connection with the arrangement according to Fig.l has been explained.

In the arrangement according to FIG. 2 is for the blocking windings the transformers belonging to a group of sense amplifiers each have a diode in Series connected, which is claimed by the blocking pulse in the forward direction. So is in series with the Blocking windings BIl ... B13 switched the diode Dl. A blocking pulse is not affected by this diode. But it prevents that a voltage pulse induced in a blocking winding by an interrogation pulse occurs at a associated closed short-circuit switch to affect a very low resistance Has. By such a voltage pulse possibly induced in the blocking windings B11 ... B13 that is, the diode D1 is loaded in the reverse direction. This avoids the The amplitude of such an induced voltage pulse remains very small. At the same time it becomes avoided that the amplitudes before voltage pulses remain very small, which may be on the secondary windings 51 ... 53 induce! and the sense amplifiers L1 ... L 3 zi have taxes. A voltage pulse induced in a blocking winding can be caused by the diode gens also do not load a transistor used as a short-circuit switch. In the appropriate way like the diode Dl, the diode D 4 has an effect.

In the arrangements according to FIGS. 1 and ί transistors Tb 1 ... TbA connected to the blocking lines can be operated with the aid of additional bits when the read-only memory is operated, which belong to the address of the information word to be queried. The access or cycle time of the read-only memory is not influenced here.

For this purpose 2 sheets of drawings

Claims (1)

build that multiple information words each have one Claim: common interrogation line are assigned, di leads over several primary windings that are made to measure Read-only memory for storing infor- g _a se of information each with certain a mationswörtem in which a plurality of information 5 plurality of a common sense line are pelt of secondary windings inductively gekop words in each case, whereby the aforementioned transformers are fabric assigned that are more Primärwick- . The individual bits of an information word depend on what information is provided, when an interrogation line is loaded, each with a certain number of an interrogation pulse by means of inductively coupled voltage pulses induced by secondary windings determined polarity and outputted to the reading amplifier the individual bits of an information word. These sense amplifiers are divided into groups when an interrogation line is supplied with one, and an interrogation pulse given to one of the groups is outputted to the relevant segment by means of a single information word. Since secondary windings induced voltage impulses, special measures are to be taken to ensure that certain polarities are determined and only the bits of a single information amplifier are output to read-only information that is divided into group words of the information assigned to an interrogation line a single information word can be output. To the; mationswort can be output, in which to bring about is z. B. known (see "Procee each transformer with a blocking winding" o dings IEE ", Part B, Volume 107, 1960, p. 567 bi: is seen and a selection device is provided 572), the sense amplifiers in question is, at the same time with an interrogation pulse, the main current paths of individually assigned over those blocking windings to connect a transistor switch with the associated secondary of the magnetic effect of the interrogation pulse windings. Only if an opposing magnetic effect in the address of the selected information-calling blocking pulse allows sending the command contained in the information word belonging to transmitters that are not made conductive by the transistor switch to be queried, the information word can be affected the bits in question are identified by the relevant secondary windings, so that all block secondary windings are output to the associated sense amplifier kierwicklungen (B 11 ... B 44) in series on a 30. The transistor switches, which are connected to the single blocking line (Bl) , belong to the secondary windings, which are connected to the other question lines (A 1 ... A x) in series with the parallel connection of the Ab primary windings of the interrogation line under consideration, and that are each coupled are, remain blocked, which means that the group of blocking windings (z. B. that when interrogating these secondary windings B 11 ... B 13) are operated on a group of read 35 idle. This has an effect on the amplifiers (Ll ... L 3) connected to overfeeding of this interrogation line with a stripper (Ki ... K 3) by a short-circuit interrogation pulse in such a way that a number of high switches (TbI) are bridged and that the load resistances in the circuit of the interrogation group of blocking windings (e.g. # 11 ... line affects. To the secondary windings, via B13) the to a group of sense amplifiers 4 ° which, on the other hand, are bits that are output to the (Ll. .. L3) belonging to the transformer (Kl ... K3) compared to much smaller input resistances, a diode (D 1) is connected in series, the sense amplifier is connected. Over this second of the blocking pulse in the forward direction, the secondary windings act accordingly in opposition to a considerably smaller voltage pulse induced by an interrogation pulse in the circuit of the interrogation line in the reverse direction. By speaking to an interrogation line. several information words are assigned, results it turns out that the total resistance acting in the circuit of such an interrogation line is essential is higher than if you only have a single information 50 word is assigned, since in the latter case this Circuit would not affect the large resistances mentioned. This has all been disadvantageous the result that the number of one and the other With the help of read-only memories, the same query driver circuit becomes queryable transfers at any time and any number of times at 55 ger is lower than usual. Provided. Such a read-only memory is already known (see German Offenkann z. B. with the help of transformers built up specification 1 948 827), to provide a remedy, the, whose primary windings on interrogation lines that the respective group of in question are connected and is determined via their secondary winding read amplifiers that a gen the individual bits of the stored information record 60 short circuit of the inputs of these sense amplifiers can be delivered. The primary windings is lifted. They do not have an effect here depending on the nature of the selected sense amplifiers to be supplied in the current circuit of the query formations redistributed to the provided interrogation lines according to their short-circuit. was pending, so also only with a very low one The bits mentioned can be in various ways 65 resistance. This has the consequence that the can be supplied (see German published application query line affecting inductance essential 827). So one is, in order to save effort, is reduced to it. Passed with one and the same query, the read-only memory in such a driver circuit can therefore with this circuit