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Electronics and Communication Digital Communication Difficulty: Medium

Consider the following statements regarding the load matching and impedance measurements: 1. A mismatched load can be properly matched to a line by inserting prior to the load a transmission line $$\frac{\lambda }{4}$$ long. 2. For matching of 120 Ω load to a 75 Ω line, the quarter-wave transformer must have a characteristic impedance of 190 Ω. 3. The main disadvantage of single-stub matching is that it is a narrow-band or frequency-sensitive device. Which of the above statements are not correct? Impulse invariance method is not preferred in the design of FIR filter other than low pass filter because of In a superconductor the value of critical density depends upon A linear Hamming code is used to map 4-bit messages to 7-bit codewords. The encoder mapping is linear. If the message 0001 is mapped to the codeword 0000111, and the message 0011 is mapped to the codeword 1100110, then the message 0010 is mapped to The gradient of the function f(x, y) = x + y at the point (0, 0) is