NO924011L - CLUTCH MODULE FOR SQUARE MODULATION AND SQUARE MODULATION - Google Patents
CLUTCH MODULE FOR SQUARE MODULATION AND SQUARE MODULATIONInfo
- Publication number
- NO924011L NO924011L NO92924011A NO924011A NO924011L NO 924011 L NO924011 L NO 924011L NO 92924011 A NO92924011 A NO 92924011A NO 924011 A NO924011 A NO 924011A NO 924011 L NO924011 L NO 924011L
- Authority
- NO
- Norway
- Prior art keywords
- frequency
- local oscillator
- square modulation
- amplifier
- output signal
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C3/00—Angle modulation
- H03C3/38—Angle modulation by converting amplitude modulation to angle modulation
- H03C3/40—Angle modulation by converting amplitude modulation to angle modulation using two signal paths the outputs of which have a predetermined phase difference and at least one output being amplitude-modulated
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
- H03D3/007—Demodulation of angle-, frequency- or phase- modulated oscillations by converting the oscillations into two quadrature related signals
- H03D3/008—Compensating DC offsets
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B19/00—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/16—Multiple-frequency-changing
- H03D7/165—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature
Abstract
En koblingsanordning til henholdsvis kvadraturmodulasjon og -demodulasjon, omfatter en lokal oscillator (LO) til generering av et utgangssignal av bestemt. frekvens, en etter den lokale oscillator (LO) koblet faseskifter (PS) til generering av to ortogonale bæresignaler, en forsterker (AGC) med en gitt øvre grensefrekvens og som påstyres av et informasjonssignal, og to multipli-katorer (Ml, MQ) som multipliserer utgangssignalet fra forsterkeren (AGC) med henholdsvis et ortogonalt bære-signal, slik at frekvensen til utgangssignalet fra den lokale oscillator (LO) er høyere enn den øvre grensefrekvens til forsterkeren (A) og at en frekvensdeler (FT) koblet mellom den lokale oscillator (LO) og faseskifteren (PS).A coupling device for quadrature modulation and demodulation, respectively, comprises a local oscillator (LO) for generating an output signal of certain. frequency, a phase shifter (PS) connected to the local oscillator (LO) to generate two orthogonal carrier signals, an amplifier (AGC) with a given upper limit frequency and controlled by an information signal, and two multipliers (M1, MQ) which multiplies the output signal from the amplifier (AGC) by an orthogonal carrier signal, respectively, so that the frequency of the output signal from the local oscillator (LO) is higher than the upper cut-off frequency of the amplifier (A) and that a frequency divider (FT) is connected between the local oscillator (LO) and the phase shifter (PS).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4134128 | 1991-10-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
NO924011D0 NO924011D0 (en) | 1992-10-15 |
NO924011L true NO924011L (en) | 1993-04-16 |
Family
ID=6442732
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO92924011A NO924011L (en) | 1991-10-15 | 1992-10-15 | CLUTCH MODULE FOR SQUARE MODULATION AND SQUARE MODULATION |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0537750A1 (en) |
FI (1) | FI924648A (en) |
NO (1) | NO924011L (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4879758A (en) * | 1987-01-02 | 1989-11-07 | Motorola, Inc. | Communication receiver system having a decoder operating at variable frequencies |
EP0305604B1 (en) * | 1987-09-03 | 1992-06-03 | Koninklijke Philips Electronics N.V. | Receiver comprising parallel signal paths |
-
1992
- 1992-10-14 FI FI924648A patent/FI924648A/en not_active Application Discontinuation
- 1992-10-15 EP EP92117646A patent/EP0537750A1/en not_active Withdrawn
- 1992-10-15 NO NO92924011A patent/NO924011L/en unknown
Also Published As
Publication number | Publication date |
---|---|
FI924648A0 (en) | 1992-10-14 |
NO924011D0 (en) | 1992-10-15 |
FI924648A (en) | 1993-04-16 |
EP0537750A1 (en) | 1993-04-21 |
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