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1. WO2000040039 - ACTIVE RADIO FREQUENCY MIXER CIRCUIT WITH FEEDBACK

Publication Number WO/2000/040039
Publication Date 06.07.2000
International Application No. PCT/US1999/031033
International Filing Date 28.12.1999
Chapter 2 Demand Filed 17.07.2000
IPC
H03D 7/14 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
DDEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
7Transference of modulation from one carrier to another, e.g. frequency-changing
14Balanced arrangements
H04M 3/00 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
MTELEPHONIC COMMUNICATION
3Automatic or semi-automatic exchanges
CPC
H03D 2200/0043
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
DDEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
2200Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
0041Functional aspects of demodulators
0043Bias and operating point
H03D 7/1433
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
DDEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
7Transference of modulation from one carrier to another, e.g. frequency-changing
14Balanced arrangements
1425with transistors
1433using bipolar transistors
H03D 7/1458
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
DDEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
7Transference of modulation from one carrier to another, e.g. frequency-changing
14Balanced arrangements
1425with transistors
1458Double balanced arrangements, i.e. where both input signals are differential
H03D 7/1491
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
DDEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
7Transference of modulation from one carrier to another, e.g. frequency-changing
14Balanced arrangements
1425with transistors
1491Arrangements to linearise a transconductance stage of a mixer arrangement
H03F 1/32
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
32Modifications of amplifiers to reduce non-linear distortion
H04M 3/00
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
MTELEPHONIC COMMUNICATION
3Automatic or semi-automatic exchanges
Applicants
  • NOKIA MOBILE PHONES LIMITED [FI/FI]; Keilalahdentie 4 FIN-02150 Espo, FI
  • GROE, John, B. [US/US]; US
Inventors
  • GROE, John, B.; US
Agents
  • KELLY, Robert; Scheef & Stone, L.L.P. Suite 1400 5956 Sherry Lane Dalls, TX 75225, US
Priority Data
09/223,90631.12.1998US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) ACTIVE RADIO FREQUENCY MIXER CIRCUIT WITH FEEDBACK
(FR) CIRCUIT MELANGEUR ACTIF A RADIOFREQUENCE
Abstract
(EN)
An active mixer circuit, and an associated method, includes a feedback element (26) which increases the linearity of the mixer circuit so that the mixer circuit is operable over a wider dynamic range than typically permitted of conventional, active mixer circuits. The mixer circuit includes a transconductance stage (18) including a pair of transconductance transistors (44, 46). Signals are applied through both of the transconductance transistors (44, 46) in parallel. The feedback element (18) is coupled to an output side of a first of the transconductance transistors (44). And, a mixing stage (38) is coupled to an output side of a second of the transconductance transistors (46).
(FR)
L'invention concerne un circuit mélangeur actif et un procédé associé. Le circuit mélangeur comprend un élément d'asservissement qui augmente sa linéarité du circuit mélangeur pour permettre à celui-ci de fonctionner sur une plage dynamique plus étendue qu'il n'est généralement possible pour des circuits mélangeurs actifs classiques. Le circuit mélangeur comprend également un étage de transconductance incluant une paire de transistors de transconductance. Des signaux sont transmis en parallèle à travers les deux transistors de transconductance. L'élément d'asservissement est couplé à un côté sortie du premier transistor de transconductance, et un étage de mélange est couplé à un côté sortie du second transistor de transconductance.
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