(b) In practice, multiple radio channels are broadcast at different frequencies and radio receivers use tuneable bandpas

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B In Practice Multiple Radio Channels Are Broadcast At Different Frequencies And Radio Receivers Use Tuneable Bandpas 1 (51.65 KiB) Viewed 41 times

(b) In practice, multiple radio channels are broadcast at different frequencies and radio receivers use tuneable bandpass filters to select a single channel. The band pass filters alter, or tune, their centre frequency to select the required channel. (i) Suggest how your bandpass filter circuit might be modified to allow it to tune to different frequencies. After the radio signal has been received it occupies frequencies between 0-9 kHz. Showing your calculations, design a low pass filter to pass this signal. The cut off frequency should be at 9.5 kHz. Sketch the filter circuit. [7 marks] (ii)