DE3013641A1 - Binary-coded-decimal counter - has string of flip=flops each comprising two cross-coupled transistors and connected via coupling transistors - Google Patents

Binary-coded-decimal counter - has string of flip=flops each comprising two cross-coupled transistors and connected via coupling transistors

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Publication number
DE3013641A1
DE3013641A1 DE19803013641 DE3013641A DE3013641A1 DE 3013641 A1 DE3013641 A1 DE 3013641A1 DE 19803013641 DE19803013641 DE 19803013641 DE 3013641 A DE3013641 A DE 3013641A DE 3013641 A1 DE3013641 A1 DE 3013641A1
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DE
Germany
Prior art keywords
flip
transistors
flops
flop
string
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE19803013641
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German (de)
Inventor
Paul 7032 Sindelfingen Merkle
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Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Individual filed Critical Individual
Priority to DE19803013641 priority Critical patent/DE3013641A1/en
Publication of DE3013641A1 publication Critical patent/DE3013641A1/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K23/00—Pulse counters comprising counting chains; Frequency dividers comprising counting chains
    • H03K23/58—Gating or clocking signals not applied to all stages, i.e. asynchronous counters
    • H03K23/582—Gating or clocking signals not applied to all stages, i.e. asynchronous counters with a base or a radix different of a power of two

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  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The counter, for an 8421 code, consists of a string of flip-flops each coupled to its neighbour via a transistor. The transistors are controlled by the count outputs of the flip-flops or from the reset outputs of the flip-flops as required. Each flip-flop consists of two cross-coupled transistors each connected via a diode and capacitor to one main electrode of that flip-flop's associated coupling transistor. The output of one flip-flop transistor is connected to the base of its associated coupling transistor.

Description

Elektronischer BCD-Zähler im 8421-Code Electronic BCD counter in 8421 code

Gegenstand der Erfindung ist eine neue Zähischaltung im 8421-Code, die keine Flipp-Flopps mit umfangreichen Zusatzschaltungen benötigt und daher sehr einfach ist. Bei der Lösung dieses Problems wurde ertindungsgemäß die Erkenntnis verwertet, daß bei einem Zählimpuls nur das erste Flipp-Flopp kippt, wenn dessen Zähl-Ausgang das Potential Null hat und immer nur die ersten beiden Flipp-Flopps kippen, wenn das erste Flipp-Flopp an seinem Zähl-Ausgang 1 hat und das Flipp-Flopp 2 Null, und daß im sonstigen immer der Reihe nach soviel Flipp-Flopp gleichzeitig kippen, wie die Zahl-Ausgänge unterbrechungsfrei 1-Potential haben + 1 (n+1). Wenn beispielsweise eine Zählschaltung aus 20 Flipp-Flopps besteht und die ersten 16 an ihrem Zähl-Ausgang das Potential 1 haben, kippen beim nächsten Zählimpuls diese ersten 16 Flipp-Flopps und außerdem noch das 17. Flipp-Flopp, weil die ersten 16 Flipp-Flopps dann Null anzeigen müssen und das 17. Flipp-Flopp die Ziffer 1 anzeigen muß. Ia gegensätzlichen Fall, wenn vergleichsweise nur die ersten 5 Flipp-Flopps und Flipp-Flopp 7 bis 15 eine 1 anzeigen (H-Potential an ihrem Zähl-Ausgang haben) kippen beim nächsten Zähl-Impuls nur die ersten 6 Flipp-Flopps, wodurch das 6. Flipp-Flopp dann auch die Ziffer 1 anzeigt und die ersten 5 Flipp-Flopps dann eine Null anzeigen (an ihren Zähl-Ausgängen das Potential 0 haben).The subject of the invention is a new counting circuit in the 8421 code, which does not require any flip-flopps with extensive additional circuits and therefore very much is easy. In solving this problem, according to the invention, the realization was made exploits the fact that only the first flip flopp flips with a counting pulse, if its The counting output has zero potential and only the first two flip-flopps flip when the first flip-flop has 1 at its counting output and the flip-flop 2 Zero, and that in the rest of the sequence always so much flip-flop at the same time tilt as the number outputs have uninterrupted 1-potential + 1 (n + 1). if For example, a counting circuit consists of 20 flip-flopps and the first 16 have the potential 1 at their counting output, they flip with the next counting pulse first 16 flip-flopps and also the 17th flip-flop, because the first 16 Flip-flopps then have to display zero and the 17th flip-flop display the number 1 got to. Yes, the opposite case, if only the first 5 flip-flopps and flip-flops 7 to 15 show a 1 (have high potential at their counting output) With the next counting pulse, only the first 6 flip-flopps flip, creating the 6th flip-flop then also shows the number 1 and the first 5 flip-flopps then show a zero (have the potential 0 at their counting outputs).

Die Verwirklichung dieses in anderer Wirkungsweise bekannten Prinzips wurde hierbei erfindungsgemäß dadurch gelöst, daß eine Eipp-Impulsleitung a angeordnet wurde und daß diese Eipp-Inpulsleitung a in jeder Flipp-Flopp-Bücke durch je einen Transistor Strom-leitend verbunden oder unterbrochen wird, dessen Basis am zugehörigen Flipp-Flopp-Ausgang (Zähl-Ausgang) angeschlossen ist. Eine derartige Flipp-F'opp-Zählkette darf selbstverständlich nicht länger als zulässig sein, weil sonst im Endbereich keine richtigen Kipp-Impulse mehr zustande kommen.The realization of this principle, which is known in another mode of operation was achieved according to the invention in that an Eipp pulse line a is arranged and that this Eipp pulse line a in each flip-flop jumper through one Transistor is connected or interrupted to conduct current, the base of which is connected to the associated Flipp-Flopp output (counting output) is connected. Such a flip-f'opp counting chain must of course not be longer than permitted, otherwise in the end area no more correct tipping impulses come about.

Auf der Zeichnung ist eine aus 4 Flipp-Flopps bestehende Zählschaltung dargestellt. Der Ausgang von Flipp-Flopp 1 hat die Bezeichnung Q1 und der Ausgang von Flipp-Flopp 2 die Bezeichnung Q2. Der Ausgang von Flipp-Flopp 3 hat die Bezeichnung Q3 und der Ausgang von Flipp-Flopp 4 die Bezeichnung Q4. Die Transistoren der Flipp-Flopps haben die Nummern 1 und 2 und die Transistoren der Kipp-Leitung a die Nummer 3. Die Widerstände haben die Nummern 4 bis 9. 10 und 11 sind 2 Dioden und 12 und 13 zwei Kondensatoren.The drawing shows a counting circuit consisting of 4 flip-flopps shown. The output of flip-flopp 1 is labeled Q1 and the output from Flipp-Flopp 2 the designation Q2. The output of flip-flopp 3 has the name Q3 and the output of flip-flop 4 is labeled Q4. The transistors of the flip-flopps have the numbers 1 and 2 and the transistors of the toggle line a have the number 3. The resistors are numbered 4 to 9. 10 and 11 are 2 diodes and 12 and 13 two capacitors.

Die Rückstellung erfolgt wie bei normalen Flipp-Flopp-Zählschaltungen über die Anschlußpunkte 14 durch einen H-Strom-Impuls.The reset is carried out as with normal flip-flop counting circuits via the connection points 14 by an H-current pulse.

LeerTseiteBlank page

Claims (3)

Patentans prüshe W Elektronische Zählschaltung im 8421-Code, dadurch gekennzeichnet, daß diese mit einer Kipp-Impuls-Leitung (a) versehen ist, in der in den Zwischenbereichen der Flipp-Flopps Transistoren angeordnet sind. Patent application W Electronic counting circuit in the 8421 code, thereby characterized in that it is provided with a toggle pulse line (a) in which transistors are arranged in the intermediate regions of the flip-flopps. 2) Elektronische Zählschaltung nach Anspruch 1, dadurch gekennzeichnet, daß die Transistoren der Kipp-Impuls-Leitung von den Zähl-Ausgängen gesteuert werden. 2) Electronic counting circuit according to claim 1, characterized in that that the transistors of the toggle pulse line are controlled by the counting outputs. 3) Elektronische Zählschaltungen nach Anspruch 1, dadurch gekennzeihnet, daß die Transistoren der Kipp-Impuls-Leitung bei SonderausXführungen von den R-Ausgängen gesteuert werden und die Kipp-Impuls-Leitung a mit PNP-Transistoren versehen ist.3) Electronic counting circuits according to claim 1, characterized marked, that the transistors of the toggle pulse line in special designs from the R outputs are controlled and the toggle pulse line a is provided with PNP transistors.
DE19803013641 1980-04-09 1980-04-09 Binary-coded-decimal counter - has string of flip=flops each comprising two cross-coupled transistors and connected via coupling transistors Withdrawn DE3013641A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19803013641 DE3013641A1 (en) 1980-04-09 1980-04-09 Binary-coded-decimal counter - has string of flip=flops each comprising two cross-coupled transistors and connected via coupling transistors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803013641 DE3013641A1 (en) 1980-04-09 1980-04-09 Binary-coded-decimal counter - has string of flip=flops each comprising two cross-coupled transistors and connected via coupling transistors

Publications (1)

Publication Number Publication Date
DE3013641A1 true DE3013641A1 (en) 1981-10-15

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ID=6099581

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19803013641 Withdrawn DE3013641A1 (en) 1980-04-09 1980-04-09 Binary-coded-decimal counter - has string of flip=flops each comprising two cross-coupled transistors and connected via coupling transistors

Country Status (1)

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DE (1) DE3013641A1 (en)

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