GATE IN 2011 Question Paper (13-Feb-2011) (Shift-2)

The value of $V_o$ of the series regulator shown below is

The ideal opamp based circuit shown below acts as a

A 4-bit successive approximation type of A/D converter has an input range of 0 to 15 volts. The output bit $b_1$ next to the LSB has a stuck-at-zero fault. The pair of input voltages that produces the same output code word is

The number of objects crossing a window sequentially at variable speed is to be counted using an interrupt in the 8085 microprocessor. The objects are sensed by an optical source and a detector with associated signal conditioning circuit. The circuit produces a logic high output as long as the object is in front of the window, and this output is used to interrupt the processor. The duration of an object being in front of the window is in the range of $100ms$ to $2s$. The processor takes $1ms$ to process the input after an interrupt. The best choice of interrupt for an error free counting is

The circuit below shows an up/down counter working with a decoder and a flip-flop. Preset and Clear of the flip-flop are asynchronous active-low inputs.



Assuming that the initial value of counter output ($Q_2{Q}_1{Q}_0$) as zero, the counter outputs in decimal for 12 clock cycles are