Descripción
Cristal de cuarzo
Un Cristal de cuarzo u oscilador de cristal es aquel oscilador que incluye en su realimentación un resonador piezoeléctrico.
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El oscilador de cristal se caracteriza por su estabilidad de frecuencia y pureza de fase, dada por el resonador.
La frecuencia es estable frente a variaciones de la tensión de alimentación. La dependencia con la temperatura depende del resonador, pero un valor típico para cristales de cuarzo es de 0′ 005% del valor a 25 °C, en el margen de 0 a 70 °C.
Estos osciladores admiten un pequeño ajuste de frecuencia, con un condensador en serie con el resonador, que aproxima la frecuencia de este, de la resonancia serie a la paralela. Este ajuste se puede utilizar en los VCO para modular su salida.
- Cristal de cuarzo de 20 MHz.
- Formato de bajo perfil, LP (Low Profile).
- Tipo de montaje superficial.
- Señal fija y estable.
- Ideal como base de tiempo en sistemas digitales que requieren gran precisión y fiabilidad.
Valoraciones
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