Modulador de Ancho de Pulso (CIR3229S)

Written by: Newton C. Braga
Category: Banco de circuitos

 

    Una aplicación interesante y que se puede implementar con el LM139, es el modulador de ancho de pulso. No hay que decir que se trata de configuración de gran utilidad en el control de motores. En la figura tenemos el circuito que hace uso de apenas un comparador y tiene su frecuencia básicamente determinada por el capacitor C1. El resistor Rc determina la sensibilidad a la señal de modulación, pudiendo ser alterado conforme a la aplicación. Ver que este circuito actúa sobre el ciclo de generación de la señal en un oscilador de relajación modificando la tensión de referencia del divisor formado por R2 y R3. También es importante observar que la señal de salida es rectangular y que el circuito no necesita una fuente de alimentación simétrica. Los valores para el capacitor están en el rango de 1 nF a 100 nF.

 


 

 

 

pcbway_012_2024

Buscador de Datasheets


N° de Componente 

Banco de Circuitos

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