GB1125302A - Improvements in or relating to a circuit arrangement for fault protection in an electronic switch - Google Patents

Improvements in or relating to a circuit arrangement for fault protection in an electronic switch

Info

Publication number
GB1125302A
GB1125302A GB50770/65A GB5077065A GB1125302A GB 1125302 A GB1125302 A GB 1125302A GB 50770/65 A GB50770/65 A GB 50770/65A GB 5077065 A GB5077065 A GB 5077065A GB 1125302 A GB1125302 A GB 1125302A
Authority
GB
United Kingdom
Prior art keywords
load
transistors
transistor
resistor
block
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.)
Expired
Application number
GB50770/65A
Inventor
Adrian Gerald Morris
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.)
M E L EQUIPMENT CO Ltd
Original Assignee
M E L EQUIPMENT CO Ltd
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 M E L EQUIPMENT CO Ltd filed Critical M E L EQUIPMENT CO Ltd
Priority to GB50770/65A priority Critical patent/GB1125302A/en
Priority to NL6616600A priority patent/NL6616600A/xx
Priority to DE1513007A priority patent/DE1513007C3/en
Priority to DK616566AA priority patent/DK116741B/en
Priority to BE690355D priority patent/BE690355A/xx
Priority to JP7793666A priority patent/JPS4411205B1/ja
Priority to SE16319/66A priority patent/SE327434B/xx
Priority to FR85567A priority patent/FR1502473A/en
Priority to AT1106766A priority patent/AT269234B/en
Publication of GB1125302A publication Critical patent/GB1125302A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/30—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor
    • H03F3/3066—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the collectors of complementary power transistors being connected to the output
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/217—Class D power amplifiers; Switching amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/66—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will
    • H03K17/665—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to one load terminal only
    • H03K17/666—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to one load terminal only the output circuit comprising more than one controlled bipolar transistor
    • H03K17/667—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to one load terminal only the output circuit comprising more than one controlled bipolar transistor using complementary bipolar transistors

Landscapes

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

Abstract

1,125,302. Transistor switching circuits. M.E.L. EQUIPMENT CO. Ltd. 30 Nov., 1965, No. 50770/65. Heading H3T. A circuit arrangement for fault protection in an electronic switch which supplies current to a load impedance 33 in the event of the load becoming short circuited, includes an amplifier e.g. 34, 36 or 35, 37 having a positive and a negative feedback circuits, the load forming part of the positive feedback circuit, and the arrangement being such that when the load impedance is substantially zero, the voltage across the load is substantially zero, and when the load impedance is above a predetermined value the load is connected to one of two predetermined voltages, + or -16V. Supposing the polarity of the input 12-12 is such that the sine-wave oscillator 4 is operative, oscillator 5 being by-passed by forwardly conducting zener diode 7, then positive pulses rectified at 15 are applied to the bases of transistos 17, 18 switching on transistor 17, and hence transistors 25, 34, 36, and switching off transistors 26, 35 and 37, The + 16V supply is thus connected through transistor 36 and resistor 32 and also through transistor 25 and resistor 30 to the load 33. Should the polarity of the input be reversed, the states of the transistors are reversed and the load is connected to the -16V supply. Should the load become short circuited, the base of transistor 34 is earthed through the load and consequently transistors 34 and 36 are switched off. Transistors 17 and 25 are however not switched off, since the short circuiting of the load does not greatly affect the output impedance of Block 2, resistor 30 being high, of comparable value to that of the load. Block 2 thus acts as a memory to drive Block 3 back into its original state when the short circuit is removed. During short circuit, the load is supplied with current only through transistor 25 and high resistor 30. Each amplifier 34, 36 and 35, 37 is provided with positive feedback from the junction of load 33 and resistor 32 to the bases of transistors 34, 35 and negative feedback from the junction of resistors 42, 43 to the emitters of transistors 34, 35, which feedback paths determine the instability of Block 3 in the active regions.
GB50770/65A 1965-11-30 1965-11-30 Improvements in or relating to a circuit arrangement for fault protection in an electronic switch Expired GB1125302A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
GB50770/65A GB1125302A (en) 1965-11-30 1965-11-30 Improvements in or relating to a circuit arrangement for fault protection in an electronic switch
NL6616600A NL6616600A (en) 1965-11-30 1966-11-25
DE1513007A DE1513007C3 (en) 1965-11-30 1966-11-26 Circuit arrangement with a switching transistor
DK616566AA DK116741B (en) 1965-11-30 1966-11-28 Electronic relay connection.
BE690355D BE690355A (en) 1965-11-30 1966-11-28
JP7793666A JPS4411205B1 (en) 1965-11-30 1966-11-29
SE16319/66A SE327434B (en) 1965-11-30 1966-11-29
FR85567A FR1502473A (en) 1965-11-30 1966-11-30 Electronic relay
AT1106766A AT269234B (en) 1965-11-30 1966-11-30 Electronic relay circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB50770/65A GB1125302A (en) 1965-11-30 1965-11-30 Improvements in or relating to a circuit arrangement for fault protection in an electronic switch

Publications (1)

Publication Number Publication Date
GB1125302A true GB1125302A (en) 1968-08-28

Family

ID=10457283

Family Applications (1)

Application Number Title Priority Date Filing Date
GB50770/65A Expired GB1125302A (en) 1965-11-30 1965-11-30 Improvements in or relating to a circuit arrangement for fault protection in an electronic switch

Country Status (9)

Country Link
JP (1) JPS4411205B1 (en)
AT (1) AT269234B (en)
BE (1) BE690355A (en)
DE (1) DE1513007C3 (en)
DK (1) DK116741B (en)
FR (1) FR1502473A (en)
GB (1) GB1125302A (en)
NL (1) NL6616600A (en)
SE (1) SE327434B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2175164A (en) * 1985-05-08 1986-11-19 Burr Brown Corp Push-pull output circuit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2659044C3 (en) * 1976-12-27 1981-07-16 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement for protecting a negative feedback two-stage amplifier against overload and short circuit
DE3712998A1 (en) * 1987-04-16 1988-11-03 Ant Nachrichtentech Complementary transistor stage for driving capacitive loads and use thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2175164A (en) * 1985-05-08 1986-11-19 Burr Brown Corp Push-pull output circuit
GB2175164B (en) * 1985-05-08 1989-06-28 Burr Brown Corp Push pull output circuit

Also Published As

Publication number Publication date
DK116741B (en) 1970-02-09
AT269234B (en) 1969-03-10
JPS4411205B1 (en) 1969-05-23
FR1502473A (en) 1967-11-18
SE327434B (en) 1970-08-24
DE1513007B2 (en) 1975-02-27
DE1513007C3 (en) 1975-10-09
NL6616600A (en) 1967-05-31
BE690355A (en) 1967-05-29
DE1513007A1 (en) 1969-10-23

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