Question: B3 (a) Name the TWO multiplexing methods and suggest one application for each.(4 marks) (b) Given an Operational Amplifier and resistors of 1k, 2k, 3k,

B3 (a) Name the TWO multiplexing methods and suggest one application for each.(4 marks) (b) Given an Operational Amplifier and resistors of 1k, 2k, 3k, 4k, 6k and 8k. In order to converting a 4 bits digital signal to a voltage signal, suggest the simplest device with circuit diagram with labels of component to perform this conversion. Label which are the LSB and MSB input. (5 marks) (c) For part (a) if only 2k and 4k resistors are available. Suggest another converter to perform the conversion. Draw the circuit diagram with labels of components and label the LSB and MSB input (5 marks) (d) Suggest the fastest device to transfer audio signal (20- 20 kHz) through a LAN network. Draft the circuit. What shall be the minimum sampling rate per Nyquist Theorem?(6 marks)

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