PROCEDIMIENTO Y DISPOSITIVO DE MEDICION DEL RUIDO DE FASE DE GENERADORES DE OSCILACIONES SINUSOIDALES

• Main Authors: GEIST, PAUL, MARTZ, ALPHONSE, CUNIN, BERNARD, GROSSETIE, JEAN-CLAUDE, MIEHE, JOSEPH-ALBERT, HEISEL, FRANCINE
• Format: Patent
• Language: Spanish
• Published: 16.08.1997
• Edition: 6
• Subjects: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; HOROLOGY; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; PHYSICS; TARIFF METERING APPARATUS; TESTING; TIME-INTERVAL MEASURING

LA PRESENTE INVENCION SE REFIERE A UN PROCESO DE MEDICION DEL RUIDO DE FASE DE GENERADORES, PARTICULARMENTE DE OSCILADORES SINUSOIDALES, Y EL DISPOSITIVO PARA LA APLICACION DE ESTE PROCESO. PROCESO DE MEDICION CARACTERIZADO EN QUE CONSISTE ESENCIALMENTE, POR UNA PARTE, EN GENERAR A PARTIR DE LA SEÑAL PROCEDENTE DEL OSCILADOR (1) EN ANALIZAR TRENES DE IMPULSOS LASER (2) REGULARES, TOMADOS EN CUENTA POR UNA CAMARA DE BARRIDO DE RANURA (3) DE MUY ALTA RESOLUCION TEMPORAL Y, POR OTRA PARTE, EN CONTROLAR SIMULTANEAMENTE EL BARRIDO DE LA PANTALLA DE VISUALIZACION DE DICHA CAMARA (3) MEDIANTE LA MISMA SEÑAL PROCEDENTE DEL OSCILADOR (1) A ANALIZAR, EN LEVANTAR LAS HUELLAS LUMINOSAS REPRESENTATIVAS DE LOS IMPULSOS LASER (RECIBIDOS SOBRE LA PANTALLA DE VISUALIZACION, BIEN INDIVIDUALMENTE, BIEN POR SERIE, MEDIANTE UNA CAMARA DE VIDEO (4) MATRICIAL, DE MUY ALTA RESOLUCION ESPACIAL CONECTADA A UNA UNIDAD DE TRATAMIENTO (5) Y, POR FIN, EN EVALUAR LOS DECALAJES, EN LA DIRECCION DE BARRIDO DE LA PANTALLA DE VISUALIZACION, DE LAS HUELLAS LUMINOSAS GRABADAS DURANTE LA MEDICION RESPECTO DE UNA HUELLA INICIAL QUE SIRVE DE REFERENCIA, PARA DETERMINAR, EN UN INSTANTE DADO Y DURANTE UN INTERVALO DE TIEMPO DADO, LA VARIACION DE LA FASE DE LA SEÑAL DE DICHO OSCILADOR (1). The subject of the present invention is a procedure for measuring phase noise of generators, especially of sinusoidal oscillators, and the apparatus for implementing this procedure. Measuring method characterised in that it consists essentially, on the one hand, in generating, from the signal coming from the oscillator (1) to be analysed, regular trains of laser pulses (2), taken into account by a slot-scanning camera (3) with very high time-domain resolution and, on the other hand, in simultaneously instigating the scanning of the visual display screen of the said camera (3) by means of the same signal issued by the oscillator (1) to be analysed, in sampling the light traces representative of the laser pulses (2) received on the visual display screen, either individually, or in series, by means of a matrix video camera (4), with very high spatial resolution, linked to a processing unit (5) and, finally, in evaluating the shifts, in the direction of scanning of the visual display screen, of the light traces recorded in the course of the measurement with respect to an initial trace serving as reference, with a view to determining, at a given instant and over a given time interval, the variation in the phase of the signal from the said oscillator (1).