WO2002047254A2 - Differential amplifier - Google Patents

Differential amplifier Download PDF

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Publication number
WO2002047254A2
WO2002047254A2 PCT/IB2001/002199 IB0102199W WO0247254A2 WO 2002047254 A2 WO2002047254 A2 WO 2002047254A2 IB 0102199 W IB0102199 W IB 0102199W WO 0247254 A2 WO0247254 A2 WO 0247254A2
Authority
WO
WIPO (PCT)
Prior art keywords
differential amplifier
power source
balancing
depend
balance
Prior art date
Application number
PCT/IB2001/002199
Other languages
French (fr)
Other versions
WO2002047254A3 (en
Inventor
Eugene Sergeyevich Aleshin
Original Assignee
Eugene Sergeyevich Aleshin
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 RU2000130831/09A external-priority patent/RU2000130831A/en
Application filed by Eugene Sergeyevich Aleshin filed Critical Eugene Sergeyevich Aleshin
Priority to AU2002214206A priority Critical patent/AU2002214206A1/en
Publication of WO2002047254A2 publication Critical patent/WO2002047254A2/en
Publication of WO2002047254A3 publication Critical patent/WO2002047254A3/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/26—Push-pull amplifiers; Phase-splitters therefor
    • H03F3/265—Push-pull amplifiers; Phase-splitters therefor with field-effect transistors only

Definitions

  • An invention concerns devices to amplify electrical signals and more particularly, to differential amplifiers.
  • An object of the invention is creation of a differential amplifier which is symmetric with regard to the power source, the balancing of which does not depend on the parameter difference of amplifying elements.
  • the object is achieved by a differential amplifier which is made under circuit of the series balance.
  • FIG. is one of variations to a differential amplifier of the series balance.
  • a differential amplifier contains: the 1st and 2nd field-effect transistors 1 and 2 of different structure, the shutters of which are the 1st and 2nd inputs 3 and 4 and the sources are connected to a coupling resistor 5, and also consisting 1st and 2nd terminating resistors 6 and 7, ones of the leads of which are connected up to the corresponding poles of the power source and the others are the opposite phase outputs 8 and 9 of a differential amplifier.
  • This device functions as follows:
  • the load current flows through the consistently-connected transistors 1 and 2, a coupling resistor 5 and the load resistors 6 and 7, as a result of that is 5.
  • the preferred differential amplifier in comparison with known of ones by executing it under circuit of the series balance lets to obtain the absolute 0 symmetry of a differential amplifier with regard to the power source and the balancing does not depend on the parameter difference of amplifying elements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

The invention concerns devices to amplify electric signals and more particularly, differential amplifiers. The object of the invention is creation of a differential amplifier which is symmetric with regards to the power source (+U, -U) the balancing of which does not depend on the parameter difference of amplifying elements. The objects is achieved by execution of a differential amplifier under circuit of the series balance, that lets to obtain the symmetry of a differential amplifier with regards to the power source (+U, -U) and its balancing does not depend on the parameter difference of amplifying elements (1, 2).

Description

Differential amplifier
An invention concerns devices to amplify electrical signals and more particularly, to differential amplifiers.
It is known differential amplifiers which are balance-paralleled symmetric amplifiers as described in Operational Devices by G.S.Ostapenko, p.305 - 306, Radio and Communication, 1989. A drawback of a balance-paralleled differential amplifier is symmetric inf ingement as a result even of a slight difference of the amplifying element parameters.
An object of the invention is creation of a differential amplifier which is symmetric with regard to the power source, the balancing of which does not depend on the parameter difference of amplifying elements. The object is achieved by a differential amplifier which is made under circuit of the series balance.
The execution of a differential amplifier under circuit of the series balance differs it from known differential amplifiers, that determines an accordance of the preferred technical embodiment to the criterion "Novelty".
Checking the preferred technical embodiment for an accordance to the criterion "Essential Distinctions" had been compared its distinguish features to features of well known technical embodiments and which showed that the execution of a differential amplifier under circuit of the series balance in well known technical embodiment is absent that lets to draw a conclusion about an accordance to the criterion "Essential Distinctions". An accordance of the preferred technical embodiment to the criterion "Positive Effect" is determined in that the execution of a differential amplifier under circuit of the series balance ensures its symmetry with regard to the power source and the balancing of a differential amplifier does not depend on the parameter difference of amplifying elements.
The invention is schematically illustrated by way of example in the accompanying drawing in which:
FIG. is one of variations to a differential amplifier of the series balance. A differential amplifier contains: the 1st and 2nd field-effect transistors 1 and 2 of different structure, the shutters of which are the 1st and 2nd inputs 3 and 4 and the sources are connected to a coupling resistor 5, and also consisting 1st and 2nd terminating resistors 6 and 7, ones of the leads of which are connected up to the corresponding poles of the power source and the others are the opposite phase outputs 8 and 9 of a differential amplifier. This device functions as follows:
The load current flows through the consistently-connected transistors 1 and 2, a coupling resistor 5 and the load resistors 6 and 7, as a result of that is 5. obtained the balance of circuit of a differential amplifier and the absolute symmetry with regard to poles of the power source for the input and output of a differential amplifier.
The preferred differential amplifier in comparison with known of ones by executing it under circuit of the series balance lets to obtain the absolute 0 symmetry of a differential amplifier with regard to the power source and the balancing does not depend on the parameter difference of amplifying elements.

Claims

Claim
A differential amplifier is characterised by so that it is executed under circuit of the series balance.
PCT/IB2001/002199 2000-12-08 2001-11-14 Differential amplifier WO2002047254A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002214206A AU2002214206A1 (en) 2000-12-08 2001-11-14 Differential amplifier

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU00130831 2000-12-08
RU2000130831/09A RU2000130831A (en) 2000-12-08 Differential amplifier

Publications (2)

Publication Number Publication Date
WO2002047254A2 true WO2002047254A2 (en) 2002-06-13
WO2002047254A3 WO2002047254A3 (en) 2002-08-29

Family

ID=20243174

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2001/002199 WO2002047254A2 (en) 2000-12-08 2001-11-14 Differential amplifier

Country Status (2)

Country Link
AU (1) AU2002214206A1 (en)
WO (1) WO2002047254A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2371696B (en) * 2001-01-02 2003-05-07 Eugueni Sergeyevich Alechine Differential amplifier

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3363191A (en) * 1964-11-23 1968-01-09 Western Union Telegraph Co Data transmission amplifier
US4229705A (en) * 1977-08-31 1980-10-21 Sansui Electric Co., Ltd. Differential amplifiers
US4356453A (en) * 1979-02-08 1982-10-26 Pioneer Electronic Corporation Reduced noise-improved gain transistor circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3363191A (en) * 1964-11-23 1968-01-09 Western Union Telegraph Co Data transmission amplifier
US4229705A (en) * 1977-08-31 1980-10-21 Sansui Electric Co., Ltd. Differential amplifiers
US4356453A (en) * 1979-02-08 1982-10-26 Pioneer Electronic Corporation Reduced noise-improved gain transistor circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2371696B (en) * 2001-01-02 2003-05-07 Eugueni Sergeyevich Alechine Differential amplifier

Also Published As

Publication number Publication date
WO2002047254A3 (en) 2002-08-29
AU2002214206A1 (en) 2002-06-18

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