El circuito que se muestra es una configuración de la unidad como un amplificador operacional de ganância 10. El amplificador 741 se utiliza como referencia, pero el circuito sirve para cualquier otro tipo sólo debiendo ser observada a potencia adecuada. La ganancia se determina por la relación entre R2 y R3 y la impedancia de entrada dada por R1. La fuente de alimentación es simétrica y condensadores de entrada y salida influyen en el límite más bajo de frecuencia. Estos componentes pueden ser cambiados según la aplicación. En la Figura 1 tenemos el circuito completo sugirió.

 

Figura 1 - Amplificador operacional inversor con ganancia de 10.

    En la simulación se utiliza el Bode Plotter para obtener la curva de respuesta del circuitos em el Multisim. Como podemos ver en la Figura 2, la ganancia cae en las frecuencias bajas, debido a la influencia de los condensadores (el lector puede cambiar estos componentes) y luego en el límite de respuesta superior, que esta en torno a 100 kHz, la ganancia cae otra vez dadas las características de lo amplificador operacional utilizado. Otros operacionais pueden utilizarse para ampliar este intervalo en el que la respuesta es lineal.

 

 

Figura 2 - Simulación realizada con el plotter para levantar la curva del circuito.

    Tenga en cuenta que en esta simulación, tanto la escala vertical (ganancia) y horizontal (frecuencia) de la Bode Plotter son logarítmicas y el límite de intensidad más baja es -100 dB. Estos ajustes pueden ser modificados como el lector quiere en la simulación.

    Recuerde que este circuito tiene baja impedancia de salida y que hay pines de entrada de compensación 1 y 5 que se puede utilizar para mejorar la respuesta de frecuencia del circuito. La siguienteNet list y simulación en  el Multisim.

 

Haga clic aquí para descargar la simulación

 

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