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Objectives:
To check the response of an RC circuit at different frequencies.
Equipments:
A 1μF Capacitor, A Digital Multimeter, A Signal Generator, A Bread Board, Connecting Wires, An Analogue trainer board, Oscilloscope.
High Pass Filter:
A high-pass filter is a filter that passes high frequencies well, but attenuates (or reduces) frequencies lower than the cutoff frequency. The actual amount of attenuation for each frequency varies from filter to filter. It is sometimes called a low-cut filter. A high-pass filter is the opposite of a low-pass filter, and a bandpass filter is a combination of a high-pass and a low-pass. It is useful as a filter to block any unwanted low frequency components of a complex signal while passing the higher frequencies. Of course, the meanings of 'low' and 'high' frequencies are relative to the cutoff frequency chosen by the filter designer.
Implementation:
A passive, analog, first-order high-pass filter, realized by an RC circuit The simplest electronic high-pass filter consists of a capacitor in series with the signal path in conjunction with a resistor in parallel with the signal path. The resistance times the capacitance (R×C) is the time constant (τ); it is inversely proportional to the cutoff frequency, at which the output power is half the input (−3 dB):
Wheref is in hertz, τ is in seconds,R is in ohms, andC is in farads.
Low Pass Filter:
A low-pass filter is a filter that passes low frequencies but attenuates (or reduces) frequencies higher than the cutoff frequency. The actual amount of attenuation for each frequency varies from filter to filter. It is sometimes called a high-cut filter, or treble cut filter when used in audio applications
400 Hz
500 Hz
600 Hz
700 Hz
1 kHz
10 kHz
20 kHz
NOTE: Individually Plot response of both low pass filter and high pass filters with respect to AV dB v/s frequany
