Explanation: In all-pass filter, the output and input voltages are equal in amplitude for all frequencies. This filter passes all frequencies equally well and with phase shift and between the two function of frequency. 5. The gain of the first order low pass filter
A. Increases at the rate 20dB/decade
B. Increases at the rate 40dB/decade
C. Decreases at the rate 20dB/decade
D. Decreases at the rate 40dB/decade
Answer:A
Explanation: In all-pass filter, the output and input voltages are equal in amplitude for all frequencies. This filter passes all frequencies equally well and with phase shift and between the two function of frequency. 5. The gain of the first order low pass filter
A. Increases at the rate 20dB/decade B. Increases at the rate 40dB/decade C. Decreases at the rate 20dB/decade D. Decreases at the rate 40dB/decade
Explanation: The rate at which the gain of the filter changes in the stop band is determined by the order of filter. So, for a low pass filter the gain decreases at the rate of 20dB/decade. 6. Which among the following has the best stop band response?