GATE ECE 1987

## GATE ECE

(a) Specify the type of the negative feedback in the JFET amplifier shown in Fig.
(b)Calculate the voltage gain (V0/Vi)

View Question In case of class A amplifiers, the ratio (efficiency of transformer coupled amplifier)/(efficiency of a transformer less

View Question In Fig. if the CMRR of the operational amplifier is 60dB, then the magnitude of the output voltage is

View Question A rectangular pulse existing between t = 0 and t = T and having an amplitude A is to be received by a matched filter
(

View Question Companding in PCM systems leads to improved signal - to - quantization noise ratio. This improvement is for

View Question White Gaussian noise is passed through a linear narrow band filter. The probability density function of the envelope of

View Question The variance of a random variable X is $$\sigma _x^2\,.$$ Then the variance of - kx (where k is a positive constant ) is

View Question In the signal flow graph shown in fig X2= TX1 where T is equal to

View Question For the system shown in figure the transfer function $$\frac{\mathrm C\left(\mathrm s\right)}{\mathrm R\left(\mathrm s\r

View Question A system has fourteen poles and two zeroes. Its high frequency asymptote, in its magnitude plot, has having a slope of

View Question The popular plot of G(s)=$${{10} \over {s{{\left( {s + 1} \right)}^2}}},$$ intercepts real axix at $$\omega = {\omega _

View Question The magnitude plot of the open loop transfer function G(s), of a certain system is given in fig,
(a) Determine G(s), if

View Question A system with derivative control is shown in figure.
(a)Determine the transfer function and the characteristic equation

View Question The subtraction of a binary number Y from another binary number X, done by adding the 2's complement of Y to X, result i

View Question Fill in the blanks of the statements below concerning the following Logic Families:
Standard TTL (74XX), Low power TTL(

View Question Given that for a logic family,
$${V_{OH}}$$ is the minimum output high-level voltage
$${V_{OL}}$$ is the minimum outp

View Question The circuit diagram of a 2 bit A to D converter is shown in figure below. The combinational logic is to be disigned to p

View Question A 2-input up/down synchrconous counter using two toggle flip-flops is shown in Fig.1. The counter's sequence is to be co

View Question A ripple counter using negative edge-triggered D-flip flops is shown in Fig.1. The flip-flops are cleared to '0' by a '0

View Question Choose the correct statements relating to the circuit of figure

View Question For an electromagnetic wave incident from one medium to a second medium, total reflection takes place when

View Question A transmission line of pure resistive characteristic impedance is terminated with an unknown load. The measured value of

View Question An electrostatic field is said to be conservative when

View Question Two long parallel wires in free space are separated by a distance R and carry currents of equal magnitude but opposite i

View Question An electric field is given by $$\overrightarrow E = \overrightarrow a {}_x\,{\rm A}\,\,\sin \,\beta ySin\,\,\omega t$$

View Question The cut-off frequency of a waveguide depends upon

View Question A thin dipole antenna is $$\left( {\lambda /15} \right)$$ long, where $$\lambda $$ is the voperating wavelength. If the

View Question In an intrinsic semiconductor the free electron concentration depends on

View Question The diffusion capacitance of a P-N junction

View Question A square waveform as shown in the figure is applied across 1 mH ideal inductor.The current through the inductor is a tri

View Question The impedance function of a parallel $$R$$, $$L$$, $$C$$ circuit has poles located at $$ - 3 \pm j4$$ rad/sec. If the

View Question The value of current through the 1F capacitor of figure is.

View Question Laplace transform of the functions t u(t) and u(t) sin(t) are respectively:

View Question