DE2002651A1 - Threshold switch with step characteristic - Google Patents

Threshold switch with step characteristic

Info

Publication number
DE2002651A1
DE2002651A1 DE19702002651 DE2002651A DE2002651A1 DE 2002651 A1 DE2002651 A1 DE 2002651A1 DE 19702002651 DE19702002651 DE 19702002651 DE 2002651 A DE2002651 A DE 2002651A DE 2002651 A1 DE2002651 A1 DE 2002651A1
Authority
DE
Germany
Prior art keywords
transistor
threshold switch
limit value
step characteristic
lower limit
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.)
Pending
Application number
DE19702002651
Other languages
German (de)
Inventor
Ludwig Dipl-Ing Horst
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LEIPZIG RFT FERNMELDEWERK
Original Assignee
LEIPZIG RFT FERNMELDEWERK
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
Application filed by LEIPZIG RFT FERNMELDEWERK filed Critical LEIPZIG RFT FERNMELDEWERK
Publication of DE2002651A1 publication Critical patent/DE2002651A1/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
    • H03K3/28—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback
    • H03K3/281—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator
    • H03K3/286—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator bistable
    • H03K3/2893—Bistables with hysteresis, e.g. Schmitt trigger
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
    • H02H3/202—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage for dc systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Description

Bezugszeichenaufstellung List of reference symbols

1 Eingangsgleichspannungsquelle 2 Innenwiderstand von 1 3 Eingangsklemme der Schaltung 4) 3 Spannungsteiler für Transistor 7 6 Arbeitswiderstand für Transistor 7 7 vorgeschalteter Transistor 8 Emitterwiderstand zu-7 9 1. Transistor des Triggers 10 Emitterwiderstand zu 9 11 Rückkopplungswiderstand zu 13 12 Arbeitswiderstand zu 13 13 2. Transistor des Triggers 14 Emftterwiderstand zu 13 15 Zenerdiode im Ausgang 16 Klemme für Betriebsßpannung 17 Ausgangsspannungsklemme 18 Masseklemme 19 Kondensator Leerseite1 DC input voltage source 2 Internal resistance of 1 3 Input terminal of the circuit 4) 3 voltage dividers for transistor 7 6 Working resistance for transistor 7 7 upstream transistor 8 Emitter resistance for-7 9 1st transistor of the trigger 10 Emitter resistance for 9 11 Feedback resistance for 13 12 Working resistance for 13 13 2nd transistor of the trigger 14 Emftter resistance for 13 15 Zener diode in the output 16 Terminal for operating voltage 17 Output voltage terminal 18 Ground terminal 19 Capacitor, empty side

Claims (2)

PatentansprücheClaims öl Schwellwertsclialter für einen oberen und unteren Grenzwert einer Gleichspannung dadurch gekennzeichnet, daß ein bekannter Schmitt-Trigger zur Bewertung des oberen Grenzwertes so mit einem weiteren Transistor (7) ergänzt wird, daß dieser Transistor mit dem zweiten Transistor des Schmitt-Triggers eine bistabile Einheit bildet, die zur Bewertung des unteren Grenzwertes dient.oil threshold value slider for an upper and lower limit value of a DC voltage characterized in that a known Schmitt trigger for evaluation of the upper limit value is supplemented with a further transistor (7) that this The transistor forms a bistable unit with the second transistor of the Schmitt trigger which serves to evaluate the lower limit value. 2. Schwellwertschalter nach Anspruch 1, dadurch gekennzeichnet, daß auch der zusätzliche Transistor (7) wie die anderen in bekannter Weise durch einen Emittenwiderstand (8) temperaturstabilisiert ist.2. Threshold switch according to claim 1, characterized in that also the additional transistor (7) like the others in a known manner by one Emitter resistor (8) is temperature-stabilized.
DE19702002651 1969-02-26 1970-01-22 Threshold switch with step characteristic Pending DE2002651A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD13813369 1969-02-26

Publications (1)

Publication Number Publication Date
DE2002651A1 true DE2002651A1 (en) 1970-09-10

Family

ID=5480949

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19702002651 Pending DE2002651A1 (en) 1969-02-26 1970-01-22 Threshold switch with step characteristic

Country Status (1)

Country Link
DE (1) DE2002651A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4131417C1 (en) * 1991-09-20 1993-04-22 Braun Ag, 6000 Frankfurt, De

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4131417C1 (en) * 1991-09-20 1993-04-22 Braun Ag, 6000 Frankfurt, De

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