GATE EC 2017 Question Paper (05-Feb-2017) (Shift 1)

For the DC analysis of the Common-Emitter amplifier shown, neglect the base current and assume that the emitter and collector currents are equal. Given that V${}_T$ = 25 mV, V${}_{BE}$ = 0.7 V, and the BJT output resistance rₒ is practically infinite. Under these conditions, the mid-band voltage gain magnitude, $A_v=\frac{V_0}{V_i}$ V/V is ________.

The amplifier circuit shown in the figure is implemented using a compensated operational amplifier (op-amp), and has an open-loop voltage gain, A₀ = 10⁵ V/V, and an open-loop cut-off frequency. f${}_c$ = 8 Hz. The voltage gain of the amplifier at 15 kHz, in V/V, is ________.

Which one of the following gives the simplified sum of products expression for the Boolean function F = m₀ + m₂ + m₃ + m₅, where m₀, m₂, m₃ and m₅ are minterms corresponding to the inputs A, B and C and A as the MSB and C as the LSB?

A 4-bit shift register circuit configured for right-shift operation, i.e. Dᵢₙ → A, A → B, B → C, C → D, is shown. If the present state of the shift register is ABCD = 1101, the number of clock cycles required to reach the state ABCD = 1111 is ________.

The following FIVE instructions were executed on an 8085 microprocessor.

MVI A, 33H

MVI B, 78H

ADD B

CMA

ANI 32H

The Accumulator value immediately after the execution of the fifth instruction is