An op-Amp is used as a zero-crossing detector. If maximum output available from the Op-Amp is $$ \pm 12\,\,{V_{p - p}}$$ and the slew rate of the Op-Amp is 12 $$V/\mu $$ sec then the maximum frequency of the input signal that can be applied without causing a reduction in the P-P output is _____

A change in the value of the Emitter resistance (R_e in a difference Amplifier.

In the given circuit if the voltage inputs V- and V+ are to be Amplified by the same Amplification factor, the value of 'R' should be

In the JFET circuit shown in Fig assume that R₁||R₂ = 1 M$$\Omega $$ and the total stray capacitance at the output to be 20 pF. The JFET used has g_m = 2mA/V, C_gs = 20 pF and C_gd = 2 pF. Determine the upper cut-off frequency of the amplifier.