IL43332A - Voltage adapting arrangement between switching units of switch circuit series and outer circuits - Google Patents

Voltage adapting arrangement between switching units of switch circuit series and outer circuits

Info

Publication number
IL43332A
IL43332A IL7343332A IL4333273A IL43332A IL 43332 A IL43332 A IL 43332A IL 7343332 A IL7343332 A IL 7343332A IL 4333273 A IL4333273 A IL 4333273A IL 43332 A IL43332 A IL 43332A
Authority
IL
Israel
Prior art keywords
supply potential
switch circuit
ttl
switch
circuits
Prior art date
Application number
IL7343332A
Other versions
IL43332A0 (en
Original Assignee
Siemens Ag
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.)
Filing date
Publication date
Priority claimed from DE19722247778 external-priority patent/DE2247778C3/en
Priority claimed from DE19722247777 external-priority patent/DE2247777C3/en
Application filed by Siemens Ag filed Critical Siemens Ag
Publication of IL43332A0 publication Critical patent/IL43332A0/en
Publication of IL43332A publication Critical patent/IL43332A/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/0175—Coupling arrangements; Interface arrangements
    • H03K19/018—Coupling arrangements; Interface arrangements using bipolar transistors only
    • H03K19/01806—Interface arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
    • H01L21/02104—Forming layers
    • H01L21/02365—Forming inorganic semiconducting materials on a substrate
    • H01L21/02656—Special treatments
    • H01L21/02664—Aftertreatments
    • H01L21/02667—Crystallisation or recrystallisation of non-monocrystalline semiconductor materials, e.g. regrowth
    • H01L21/02675—Crystallisation or recrystallisation of non-monocrystalline semiconductor materials, e.g. regrowth using laser beams

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Optics & Photonics (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Logic Circuits (AREA)
  • Electronic Switches (AREA)
  • Manipulation Of Pulses (AREA)

Description

43332/2 n'D ηη'η» a nna nasnn »*η*το o' ayoi xm»n «^ iya nivro Voltage adapting arrangements between switching units of switch circuit series and outer circuits This invention relates to a circuit arrangement for connecting switching units of switch circuit series, especially switch circuit series in TTL-technique , supplied"* by a first supply potential, with other circuits which are connected to a second supply potential of opposite polarity and, particularly, of greater magnitude than the first.
Furthermore, such a circuit arrangement can be utilized, for example, for switch circuits of switch circuit series in DTL-or LSL-technique (diodes-transistor-logic or slow interference protected logic) .
From pages 168 to 172 of the 1966 Siemens Journal . it is already known how to provide a switch circuit system with adaptation circuits which produce the transition to external circuits. In part, these adaptation circuits are based on the fact that several supply voltages are available. In a contact monitoring input member provision is made for the contact to be joined to negative voltage.
However, there are applications in which one connection of switches provided for contact making purposes is connected to zero potential and their other connection is connected to negative supply voltage by way of a resistor. Furthermore, it can occur that only one additional supply voltage is available apart from the supply voltage for the TTL-switch circuits (transistor-transistor-logic cirquits) . Moreover, it may become necessary to operate switches with the assistance of the output signals of TTL-swit.ch circuits which switch a load connected to the negative supply voltage to. zero potential.
It is therefore the task of the invention to develop a circuit arrangement as described in detail above which allows for the simplest possible operation of TTL-switching circuits in connection with circuits which are supplied with a supply potential of opposite polarity to that of the supply potential required for the switching circuits.
In accordance with the invention the circuit arrangement for solving this task is designed so that there is provided at the transition from the circuit to the TTL-switching unit a first level converter in which there is arranged between the second supply potential and the first supply potential or another supply potential of the same polarity, a voltage divider consisting of three series-connected branches which is connected with its tap, arranged on the side of the first supply potential, to zero potential by way of a switch, and with its tap, arranged on the side of the first supply potential, to the base of an npn-transistor whose emitter is connected to zero potential, and-with its collector to the following TTL-switching unit. In this context the branches of the voltage dividers are preferably three resistors. When the second supply potential is small it is useful to replace the centre resistor by a diode threshold which is formed by a zener diode or at least two series-connected diodes with utilized threshold voltages. This measure results in a particularly easily realized method of safely performing the desired level adaptation.
The invention is now described in detail with reference to the Figure, wherein the Figure is a TTL-switch circuit with a level converter on the input side.
The Figure represents a circuit arrangement in which it is possible with the aid of a first level converter to approach a TTL-switch circuit via a switch which is connected to zero potential or ground, and which may also be an electronic switch. It is possible with this type of circuit to evaluate with the aid of TTL-units which are supplied with +5V, signals of sources, particularly pnp-transistors, which are waiting for a consuming device connected to -24 V Switch S of which one pole is connected to mass or zero potential, is connected to the second supply potential -24 V by way of resistor Rl. E identifies the contact point of switch S with resistor Rl and represents the input of the level converter. .
By way of resistor R2 und resistor R3, arranged in series to the former, input E is connected to the first supply potential +5 V, so. that between the first and the second supply potential there is arranged a voltage divider consisting of 3 resistors. The tap of the voltage divider, or the point of connection of resistors R2 and R3 respectively, is connected to the base of the ripn-transistor Tsl whose emitter is directly connected to zero potential, while its collector is connected to the first supply potential +5 V via resistor R4 and also to the input of the TTL-switch circuit Gl. The tap of the voltage. divider which is situated on the side of the second supply potential -24 V also forms the input E of the level converter.
The current branch with resistor R4 can be left out of the level converter if it is not opposed by the operating data of the switch circuit Gl. In the rest condition switch S - or, respectively, the pnp-transistor by which it is replaced in accordance with the circuit section drawn in broken line - is opened. This results in the formation of a negative voltage at input E of a little less than 24 V. Resistors R2 and R3 are dimensioned such that in this case the base of transistor Tsl is negative to the extent of blocking transistor Tsl, and that, as a result, log 1 is available at the input of the following TTL-switch circuit.
When switch S is clpsed and ground potential is applied to input E, the potential at the base of transistor Tsl becomes positive to the extent that transistor Tsl becomes conducting and, as a result, log 0 becomes available at the input of the following TTL-switch circuit.

Claims (1)

1. CLAIM A circuit arrangement for connecting switching units of switch circuit series, especially switch circuit series in TTL-technique, supplied by a first supply potential with other circuits which are connected to a second supply potential of opposite polarity and, particularly, of greater magnitude than the first, characterized in that where transition is to be made from the circuit to the TTL-switching unit there is provided a first level converter in which there is arranged between the second supply potential (-24 V) and the first supply potential (+5 V) or another supply potential of the same polarity, a voltage divider consisting of three series-connected branches which is connected with its tap, arranged on the side of the second supply potential, to zero (ground) by way of a switch, and with its tap, arranged on the side of the first supply potential, to the base of an -npn-transistor whose emitter is connected to zero potential (ground and whose collector is connected to the following TTL-switching unit.
IL7343332A 1972-09-29 1973-09-26 Voltage adapting arrangement between switching units of switch circuit series and outer circuits IL43332A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19722247778 DE2247778C3 (en) 1972-09-29 1972-09-29 Circuit arrangement for interconnecting switching units with circuits that are not part of the circuit system
DE19722247777 DE2247777C3 (en) 1972-09-29 1972-09-29 Circuit arrangement for storing and displaying signals, in particular for devices for remote monitoring and / or remote control

Publications (2)

Publication Number Publication Date
IL43332A0 IL43332A0 (en) 1973-11-28
IL43332A true IL43332A (en) 1977-06-30

Family

ID=25763901

Family Applications (2)

Application Number Title Priority Date Filing Date
IL7343332A IL43332A (en) 1972-09-29 1973-09-26 Voltage adapting arrangement between switching units of switch circuit series and outer circuits
IL50959A IL50959A0 (en) 1972-09-29 1976-11-22 Voltage adapting arrangements between switching units of switch circuit series and outer circuits

Family Applications After (1)

Application Number Title Priority Date Filing Date
IL50959A IL50959A0 (en) 1972-09-29 1976-11-22 Voltage adapting arrangements between switching units of switch circuit series and outer circuits

Country Status (5)

Country Link
JP (2) JPS4973964A (en)
AT (1) AT319385B (en)
IL (2) IL43332A (en)
IT (1) IT993471B (en)
NL (1) NL7313305A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT319385B (en) * 1972-09-29 1974-12-27 Siemens Ag Circuit arrangement for the interconnection of switching units with circuits external to the circuit system
JPS5672528A (en) * 1979-11-16 1981-06-16 Nec Corp Control circuit of switcher
DE3003738C2 (en) * 1980-01-31 1984-01-19 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Electronic connection circuit
JP2671304B2 (en) * 1987-05-29 1997-10-29 日本電気株式会社 Logic circuit

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT319385B (en) * 1972-09-29 1974-12-27 Siemens Ag Circuit arrangement for the interconnection of switching units with circuits external to the circuit system

Also Published As

Publication number Publication date
JPS4973964A (en) 1974-07-17
AT319385B (en) 1974-12-27
IL43332A0 (en) 1973-11-28
IT993471B (en) 1975-09-30
IL50959A0 (en) 1977-01-31
AU6061873A (en) 1975-03-27
JPS6058610B2 (en) 1985-12-20
NL7313305A (en) 1974-04-02
JPS5242061A (en) 1977-04-01

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