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1. WO2000041297 - NOISE REDUCTION SCHEME FOR OPERATIONAL AMPLIFIERS

Publication Number WO/2000/041297
Publication Date 13.07.2000
International Application No. PCT/US1999/031057
International Filing Date 28.12.1999
Chapter 2 Demand Filed 02.08.2000
IPC
H03F 1/26 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
26Modifications of amplifiers to reduce influence of noise generated by amplifying elements
H03F 3/45 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
45Differential amplifiers
CPC
H03F 1/26
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
26Modifications of amplifiers to reduce influence of noise generated by amplifying elements
H03F 2203/45528
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2203Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
45Indexing scheme relating to differential amplifiers
45528the FBC comprising one or more passive resistors and being coupled between the LC and the IC
H03F 3/45475
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
45Differential amplifiers
45071with semiconductor devices only
45076characterised by the way of implementation of the active amplifying circuit in the differential amplifier
45475using IC blocks as the active amplifying circuit
H03F 3/45479
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
45Differential amplifiers
45071with semiconductor devices only
45479characterised by the way of common mode signal rejection
Applicants
  • TRIPATH TECHNOLOGY, INC. [US/US]; Suite 200 3900 Freedom Circle Santa Clara, CA 95054, US
Inventors
  • LLEWELLYN, William, D.; US
Agents
  • VILLENEUVE, Joseph, M.; Beyer & Weaver, LLP P.O. Box 61059 Palo Alto, CA 94306, US
Priority Data
09/406,31927.09.1999US
60/114,70604.01.1999US
60/146,42929.07.1999US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) NOISE REDUCTION SCHEME FOR OPERATIONAL AMPLIFIERS
(FR) SYSTEME DE REDUCTION DU BRUIT POUR AMPLIFICATEURS OPERATIONNELS
Abstract
(EN)
Methods and apparatus are described for generating or amplifying a differential signal. The output of a first op amp (op amp 1') corresponds to one end of the differential signal. The output of a second op amp (op amp 2') corresponds to the other end of the differential signal. The inverting input of the first op amp (op amp 1') is coupled to the noninverting input of the second op amp (op amp 2').
(FR)
L'invention concerne des procédés et des appareils permettant de fournir ou d'amplifier un signal différentiel. La sortie d'un premier amplificateur opérationnel (1') correspond à une extrémité du signal différentiel. La sortie d'un second amplificateur opérationnel (2') correspond à l'autre extrémité du signal différentiel. L'entrée inverseuse du premier amplificateur (1') est couplée à l'entrée non inverseuse du second amplificateur (2').
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