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Electronics and Communication Information Theory And Coding Difficulty: Medium

In an 8-bit D/A converter, the reference voltage used is 10 V. What voltage is represented by 10100001? Input resistance of inverting amplifier as shown in figure with ideal op-amp is: What are the celestial bodies revolving around the planets called as? The system matrix of a continuous time system is described in the state variable form is: \[A = \left[ {\begin{array}{*{20}{c}} x&0&0\\ 0&y&{ - 1}\\ 0&1&{ - 2} \end{array}} \right]\] The system is stable for all values of x and y satisfying. In ideal op-amp the current through the virtual ground is