Some content of this application is unavailable at the moment.
If this situation persists, please contact us atFeedback&Contact
1. (WO1991007016) A PHASE LOCKED LOOP FOR PRODUCING A REFERENCE CARRIER FOR A COHERENT DETECTOR
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/007016 International Application No.: PCT/FI1990/000248
Publication Date: 16.05.1991 International Filing Date: 19.10.1990
Chapter 2 Demand Filed: 19.03.1991
IPC:
H03C 3/09 (2006.01) ,H03D 1/22 (2006.01) ,H03L 7/087 (2006.01) ,H03L 7/23 (2006.01)
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
C
MODULATION
3
Angle modulation
02
Details
09
Modifications of modulator for regulating the mean frequency
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
D
DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
1
Demodulation of amplitude-modulated oscillations
22
Homodyne or synchrodyne circuits
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
L
AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
7
Automatic control of frequency or phase; Synchronisation
06
using a reference signal applied to a frequency- or phase-locked loop
08
Details of the phase-locked loop
085
concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
087
using at least two phase detectors or a frequency and phase detector in the loop
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
L
AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
7
Automatic control of frequency or phase; Synchronisation
06
using a reference signal applied to a frequency- or phase-locked loop
16
Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
22
using more than one loop
23
with pulse counters or frequency dividers
Applicants:
TELENOKIA OY [FI/FI]; P.O. Box 44 SF-02601 Espoo, FI (AllExceptUS)
MÄKINEN, Jarmo [FI/FI]; FI (UsOnly)
Inventors:
MÄKINEN, Jarmo; FI
Agent:
OY KOLSTER AB; Iso Roobertinkatu 23 P.O. Box 148 FIN-00121 Helsinki, FI
Priority Data:
89506825.10.1989FI
Title (EN) A PHASE LOCKED LOOP FOR PRODUCING A REFERENCE CARRIER FOR A COHERENT DETECTOR
(FR) BOUCLE A VERROUILLAGE DE PHASE SERVANT A PRODUIRE UNE PORTEUSE DE REFERENCE POUR UN DETECTEUR COHERENT
Abstract:
(EN) The invention relates to a phase locked loop for producing a reference carrier for a coherent detector, comprising a first phase detector (9) which compares the estimated carrier frequency of an incoming signal and the frequency of a local reference carrier oscillator (11) and produces a control signal proportional to the phase difference between said two frequencies. The oscillator (11) comprises a reference oscillator (1), a loop oscillator (5), a second phase detecting means (2) having inputs to which the output of the reference oscillator (1) and the output of the loop oscillator (5) are connected; and frequency adjusting means (6) which in response to said control signal adjust the frequency of the reference carrier oscillator (11) by simultaneously adjusting both the reference oscillator (1) and the loop oscillator (5).
(FR) On décrit une boucle à verrouillage de phase servant à produire une porteuse de référence pour un détecteur cohérent, comportant un premier comparateur de phase comparant la fréquence porteuse estimée d'un signal d'entrée avec la fréquence d'un oscillateur de porteuse de référence local (11) et produisant un signal de commande proportionnel à la différence de phase entre lesdites deux fréquences. L'oscillateur (11) comporte un oscillateur de référence (1), un oscillateur de boucle (5), un deuxième moyen détecteur de phase (2) possédant des entrées auxquelles sont connectées les sorties de l'oscillateur de référence (1) et de l'oscillateur de boucle (5); ainsi qu'un moyen régleur de fréquence (6) qui, en réponse audit signal de commande, règle la fréquence de l'oscillateur de porteuse de référence (11) par un réglage simultané de l'oscillateur de référence (1) et de l'oscillateur de boucle (5).
Designated States: DE, GB, JP, US
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0497801