EP0797871A1 - Comparateur differentiel avec seuil ajustable et hysteresis de poursuite - Google Patents

Comparateur differentiel avec seuil ajustable et hysteresis de poursuite

Info

Publication number
EP0797871A1
EP0797871A1 EP95910070A EP95910070A EP0797871A1 EP 0797871 A1 EP0797871 A1 EP 0797871A1 EP 95910070 A EP95910070 A EP 95910070A EP 95910070 A EP95910070 A EP 95910070A EP 0797871 A1 EP0797871 A1 EP 0797871A1
Authority
EP
European Patent Office
Prior art keywords
current
transistors
current switch
switch
coupled
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Withdrawn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
EP95910070A
Other languages
German (de)
English (en)
Inventor
Anthony R. Bonaccio
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of EP0797871A1 publication Critical patent/EP0797871A1/fr
Withdrawn legal-status Critical Current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
    • H03K3/2897—Bistables with hysteresis, e.g. Schmitt trigger with an input circuit of differential configuration
    • 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
    • H03K3/023—Generators characterised by the type of circuit or by the means used for producing pulses by the use of differential amplifiers or comparators, with internal or external positive feedback
    • H03K3/0233—Bistable circuits
    • H03K3/02337—Bistables with hysteresis, e.g. Schmitt trigger

Definitions

  • the circuit shown in Fig. 2 further includes a pair of NPN, bipolar, emitter coupled, main amplifier transistors 122 and 123.
  • the emitters of these main amplifier transistors 122 and 123 are coupled to ground 114 through a bias current source 124.
  • the collectors of these amplifier transistors 122 and 123 are respectively coupled to a supply voltage V DD through respective current resistors 126 and 127 and to the bases of respective output drive NPN, bipolar, transistors 128 and 129.
  • the bases of the main amplifier transistors 122 and 123 are respectively connected through respective threshold resistors 130 and 131 to the collectors of the switching transistors 112 and 1 13.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manipulation Of Pulses (AREA)

Abstract

Circuit comparateur programmable perfectionné comprenant une paire d'entrées différentielles (VN, VP), qui va enclencher un premier commutateur de courant (22, 23) par l'intermédiaire de réseaux de résistances identiques respectifs (16, 30, 17, 31) pour permettre d'effectuer la comparaison du différentiel des entrées avec une tension de seuil. La tension de seuil est établie par la tension qui est générée lorsque l'on fait passer un courant donné par un desdits réseaux de résistance, de sorte qu'un courant de polarisation traversant un des transistors constituant le premier commutateur de courant et traversant un deuxième commutateur de courant (12, 13), établisse un courant d'hystérésis à travers un des transistors constituant le deuxième commutateur de courant. Un dispositif de rétroaction positive (28, 29, D1-D4) couplé à la sortie du premier commutateur de courant (22, 23) commande le deuxième commutateur de courant (12, 13).
EP95910070A 1994-12-16 1994-12-16 Comparateur differentiel avec seuil ajustable et hysteresis de poursuite Withdrawn EP0797871A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1994/014459 WO1996019042A1 (fr) 1994-12-16 1994-12-16 Comparateur differentiel avec seuil ajustable et hysteresis de poursuite

Publications (1)

Publication Number Publication Date
EP0797871A1 true EP0797871A1 (fr) 1997-10-01

Family

ID=22243403

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95910070A Withdrawn EP0797871A1 (fr) 1994-12-16 1994-12-16 Comparateur differentiel avec seuil ajustable et hysteresis de poursuite

Country Status (4)

Country Link
EP (1) EP0797871A1 (fr)
JP (1) JPH10500549A (fr)
KR (1) KR100239016B1 (fr)
WO (1) WO1996019042A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6272185B1 (en) * 1998-05-04 2001-08-07 Nortel Networks Limited Method and apparatus for performing data pulse detection
US6529564B1 (en) * 1999-01-28 2003-03-04 Nortel Networks Limited Data pulse receiver
CN111726109A (zh) * 2020-07-09 2020-09-29 南京优倍电气有限公司 一种回差比例可调的任意阈值处理电路
KR102701273B1 (ko) 2022-09-05 2024-09-03 김남국 밀링머신의 밀링커터

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3757137A (en) * 1969-12-18 1973-09-04 Rca Corp Low voltage reference circuit
US5039888A (en) * 1989-11-14 1991-08-13 Harris Corporation Method and circuit arrangement for providing programmable hysteresis to a differential comparator
JP2607729B2 (ja) * 1990-04-21 1997-05-07 株式会社東芝 ヒステリシスコンパレータ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9619042A1 *

Also Published As

Publication number Publication date
JPH10500549A (ja) 1998-01-13
KR980700730A (ko) 1998-03-30
WO1996019042A1 (fr) 1996-06-20
KR100239016B1 (ko) 2000-01-15

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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17P Request for examination filed

Effective date: 19970703

AK Designated contracting states

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Designated state(s): DE FR GB

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19980701