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GB2005101A - Improvements in or relating to comparator circuit arrangements - Google Patents

Improvements in or relating to comparator circuit arrangements

Info

Publication number
GB2005101A
GB2005101A GB7838023A GB7838023A GB2005101A GB 2005101 A GB2005101 A GB 2005101A GB 7838023 A GB7838023 A GB 7838023A GB 7838023 A GB7838023 A GB 7838023A GB 2005101 A GB2005101 A GB 2005101A
Authority
GB
United Kingdom
Prior art keywords
differential
long
pulse
polarity
collectors
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Withdrawn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
GB7838023A
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.)
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.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB2005101A publication Critical patent/GB2005101A/en
Withdrawn legal-status Critical Current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
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
    • H03F3/4508—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using bipolar transistors as the active amplifying circuit
    • H03F3/45085—Long tailed pairs
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/72—Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45338—Indexing scheme relating to differential amplifiers the AAC comprising one or more series circuits of a resistor and a capacitor as feedback circuit elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45392—Indexing scheme relating to differential amplifiers the AAC comprising resistors in the source circuit of the AAC before the common source coupling
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45511—Indexing scheme relating to differential amplifiers the feedback circuit [FBC] comprising one or more transistor stages, e.g. cascaded stages of the dif amp, and being coupled between the loading circuit [LC] and the input circuit [IC]
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45594—Indexing scheme relating to differential amplifiers the IC comprising one or more resistors, which are not biasing resistor
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45652—Indexing scheme relating to differential amplifiers the LC comprising one or more further dif amp stages, either identical to the dif amp or not, in cascade
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45702—Indexing scheme relating to differential amplifiers the LC comprising two resistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45728—Indexing scheme relating to differential amplifiers the LC comprising one switch

Landscapes

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

Abstract

A comparator circuit comprises a differential amplifier which is switchable from a stable to an unstable state, and vice versa. The differential amplifier comprises a balanced long-tailed pair of transistors Q1, Q2 which may be FETS with a field effect transistor (F.E.T.) Q3 having a channel connected between the collectors or drains of the long-tail pair and a gate connected to a pulse generator. The F.E.T. normally shorts together the collectors, but pulses from the pulse generator restore differential gain to the amplifier. During the presence of each pulse, a differential output signal is produced whose polarity depends on the imbalance in the differential inputs of the two halves of the long-tailed pair. With no input signal, random noise produces equal numbers of output pulses of each polarity. An input signal below the noise level is detectable, as it alters the pulse polarity distribution. <IMAGE>
GB7838023A 1977-09-24 1978-09-25 Improvements in or relating to comparator circuit arrangements Withdrawn GB2005101A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772743099 DE2743099A1 (en) 1977-09-24 1977-09-24 CIRCUIT ARRANGEMENT WITH TRANSISTORS

Publications (1)

Publication Number Publication Date
GB2005101A true GB2005101A (en) 1979-04-11

Family

ID=6019829

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7838023A Withdrawn GB2005101A (en) 1977-09-24 1978-09-25 Improvements in or relating to comparator circuit arrangements

Country Status (3)

Country Link
DE (1) DE2743099A1 (en)
FR (1) FR2404338A1 (en)
GB (1) GB2005101A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0043257B1 (en) * 1980-06-30 1986-05-28 Rca Corporation Operational amplifier with programmable gain
US6121809A (en) * 1998-06-01 2000-09-19 Institute Of Microelectronics Accurate and tuneable active differential phase splitters in RFIC wireless applications
EP1265357A1 (en) * 2001-06-08 2002-12-11 Agilent Technologies, Inc. (a Delaware corporation) Driver circuit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111738303B (en) * 2020-05-28 2023-05-23 华南理工大学 A Long Tail Distribution Image Recognition Method Based on Hierarchical Learning

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0043257B1 (en) * 1980-06-30 1986-05-28 Rca Corporation Operational amplifier with programmable gain
US6121809A (en) * 1998-06-01 2000-09-19 Institute Of Microelectronics Accurate and tuneable active differential phase splitters in RFIC wireless applications
SG81929A1 (en) * 1998-06-01 2001-07-24 Inst Of Microelectronics Accurate and tuneable active differential phase splitters in rfic wireless applications
EP1265357A1 (en) * 2001-06-08 2002-12-11 Agilent Technologies, Inc. (a Delaware corporation) Driver circuit
US6850546B2 (en) 2001-06-08 2005-02-01 Agilent Technologies, Inc. Driver circuit

Also Published As

Publication number Publication date
FR2404338A1 (en) 1979-04-20
DE2743099A1 (en) 1979-04-05

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)