Simple low pass circuit - Behaviour in high frequency region

Q.  Which among the below mentioned circuits resemble its behaviour similar to that of an amplifier in high frequency region, as the response decreases with an increase in frequency?
- Published on 24 Sep 15

a. Simple high pass circuit
b. Simple low pass circuit
c. Simple band pass circuit
d. Simple band stop circuit

ANSWER: Simple low pass circuit

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    Discussion

  • Satyawati   -Posted on 29 Sep 15
    It is quite clear that the gain of an amplifier is almost constant as far as mid frequency region is taken into consideration. But, an amplifier exhibits its behavior similar to that of a simple high pass circuit especially in the low frequency region .This is so because the response decreases due to decrease in frequency. Hence, this circuit allows to pass only the higher frequencies by blocking lower frequencies.

    On the contrary, an amplifier behaves as a low pass circuit in high frequency region because the response decreases with an increase in frequency. However, only lower frequencies are allowed to pass by this circuit by attenuation all other high frequencies. This property is exhibited by an amplifier which resembles to simple low pass circuit.

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