GATE ECE
Analog Circuits
Frequency Response
Previous Years Questions

## Marks 1

The Miller effect in the context of a Common Emitter amplifier explains
Which one of the following statements is correct about an ac-coupled common- emitter amplifier operating in the mid-band region?
Generally, the gain of a transistor Amplifier falls at high frequency due to the
Three identical RC-Coupled transistor amplifiers are cascaded. If each of the amplifiers has a frequency response as shown in figure, the overall fr...
The current gain of a bipolar transistor drops at high frequencies because of
The $${f_T}$$ of a BJT is related to its $${g_{m,}}\,\,{C_\pi }$$ and $${C_\mu }$$ as follows
An npn transistor has a beta cut-off frequency $${f_\beta }$$ of 1MHz and Common Emitter short circuit low frequency current gain $${\beta _o}$$ of 2...
An Amplifier has an open-loop gain of 100 and its lower and upper-cut-off frequency of 100 Hz and 100 kHz respectively, a feedback network with a feed...
An RC-Coupled Amplifier is assumed to have a single-pole low frequency transfer function. The maximum lower-cutoff frequency allowed for the Amplifier...
In a multi-stage RC-Coupled Amplifier the coupling capacitor.

## Marks 2

Consider the common emitter amplifier shown below with the following circuit parameters: $$\beta = 100,\,{g_m} = 0.3861\,{\rm A}/V,\,{r_0} = \infty ,... Consider the common emitter amplifier shown below with the following circuit parameters:$$\beta = 100,\,{g_m} = 0.3861\,{\rm A}/V,\,{r_0} = \infty ,...
An ideal sawtooth voltage waveform of a frequency 500 Hz and Amplitude 3 V is generated by charging a capacitor of 2 $$\mu F$$ in every cycle the char...
An npn BJT has gm = 38 mA/V, $${C_\mu }\, = {10^{ - 14}}$$ F, $${C_\pi }\, = 4\, \times {10^{ - 13}}\,F$$ and DC current gain $$\beta \, = \,90$$. For...
An NPN transistor (with $${C_\pi }\,\, = \,\,0.3\,\,$$ pf) has a unity gain cutoff frequency $${f_T}$$ of 400 MHz at a DC-bias current Ic = 1mA. Th...
An amplifier is assumed to have a single pole high frequency transfer function. The rise time of its output response to a step function input is 35 ns...
In the circuit shown in Fig. is a finite gain amplifier with a gain of K, a very large input impedance, and a very low output impedance. The input imp...

## Marks 5

A common-emitter amplifier with an external capacitor CC connected across the base and the collector of the transistor is shown in Fig. Transistor d...
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