The circuit shown in the figure uses matched transistors with a thermal voltage $${V_T} = 25\,mV.$$ The base currents of the transistors are negligible. The value of the resistance $$R$$ in $$k\Omega $$ that is required to provide $$1\,\,\,\mu A$$ bias current for the differential amplifier block shown is ____________.

The voltage gain $${A_V}$$ of the circuit shown below is

The transistor used in the circuit shown below has a $$\beta $$ of $$30$$ and $${{\rm I}_{CBO}}$$ is negligible.

If the forward voltage drop of diode is $$0.7V.$$ Then the current through collector will be

The transistor circuit shown uses a silicon transistor with $${V_{BE}} = 0.7V,{{\rm I}_C} \approx {{\rm I}_E}$$ and a $$DC$$ current gain of $$100.$$ The value of $${V_0}$$ is