List of top Analog and Digital Electronics Questions asked in GATE Instrumentation Engineering

In a p–i–n photodiode, a pulse with $8\times10^{12}$ incident photons at $\lambda_0=1.55\,\mu$m yields $4\times10^{12}$ electrons collected. The quantum efficiency at this wavelength is _______%.
The diode in the circuit is ideal. The current source $i_s(t)=\pi\sin(3000\pi t)$ mA. The magnitude of the average current flowing through the resistor $R$ is _____ mA (rounded off to two decimal places).
The op-amp (ideal except \(I_b=1\,\text{nA}\) input bias current and \(V_{\!os}=10\,\mu\text{V}\) input offset) is the inverting amplifier with \(R_{\text{in}}=1~\text{k}\Omega\) and \(R_f=100~\text{k}\Omega\). Find the worst-case output offset voltage \((\pm~\mu\text{V})\) (rounded to the nearest integer).