# Prior to sampling an anti-aliasing filter is used.

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Prior to sampling an anti-aliasing filter is used.

Prior to sampling an anti-aliasing filter is used. It is used to attenuate the high frequency component of the Signal

## Related questions

The sampling rate to avoid aliasing for the signal m(t) = 100 cos 200ωt will be A) ≥1/25 sec B) ≥1/50 sec C) ≤1/25 sec D) ≤ 1/50 sec

A signal m(t) = 3cos(6000nt)+4cos(7000nt)+5cos(100001-it) to be sampled. What is the minimum sampling rate for band pass sampling for truth full representation : a. 2000 Hz b. 3000 Hz c. 5000 Hz d. 10000 Hz

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The ripple factor in an LC filter.   (A) Increases with the load current (B) Increases with the load resistance (C) Remains constant with the load current (D) Has the lowest value

In a 3-phase voltage source inverter used for speed control of induction motor, anti-parallel diodes are used across each switching device. The main purpose of diodes is to:

In FM demodulation hard limiter and hand pass filter are used to remove (a) frequency variation in the FM wave (b) amplitude variation in FM wave (c) noise in the demodulated wave (d) amplitude variations in demodulated wave

We wish to build a 135 V, 20 A, DC power supply using a single phase bridge rectifier and an inductive filter. The peak to peak current ripple should be about 10%. If a 60 Hz AC source is available; Calculate the peak to peak current ripple.  (A) 19 A (B) 20 A (C) 2 A (D) 1 A

The signal is extended from 96KHz to 100KHz, so the minimum sampling frequency required is  (a) 8KHz (b) 200KHz (c) 4KHz (d) 100KHz

In order to recover the original signal from the Sampled one, what is the condition to be satisfied for sampling frequency ωs and highest frequency component ωm?  (A) ωm < ωs ≤ 2 ωm (B) ωs ≥ 2 ωm (C) ωs < ωm (D) ωs = ωm

Without any additional circuitry, an 8:1 MUX can be used to obtain:  (1) Some but not all Boolean functions of 3 variables (2) All function of 3 variables but none of 4 variables (3) All functions of 3 variables and some but not all of 4 variables (4) All functions of 4 variables

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A band pass filter is that which

A twin T network is a filter of kind  A) BEF B) LPF C) HPF D) BPF

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What is the harmonic filter?

What is the function of an electrical filter ?

An emitter follower circuit is widely used in electronic instruments because  (A) Its voltage gain is less than unity  (B) its output impedance is high and input impedance is low  (C) its output impedance is low and input impedance is high  (D) none of the above

The effect of a finite gain of an operational amplifier used in an integrator is that (A) it would not integrate (B) the slope of the output will vary with time (C) the final value of the output voltage will reduce (D) there will be instability in the circuit

A high-pass filter has a resistance R = 2 kΩ The lowest input frequency to be passed is 7.5 kHz. The value of suitable coupling capacitor must be: A) 0.001 pico Farad B) 0.01 pico Farad C) 0.1 pico Farad D) 1 pico Farad

When measuring strain, ballast circuit use a capacitor to act as a high pass filter. This is done when:  a) Static strain are being measured b) Dynamic strain are being measured c) Both Static and dynamic strain are being measured d) None of the above

The primary function of a filter is to : -  a) minimize input variations b) suppness odd harmonics in the rectifier output c) stabalise DC level of o/p voltage d) remove ripples from rectified output

A waveguide termination having VSWR of 1.1 is used to dissipate 100 watts of power. The reflected power will be A) 0.2268 W B) 0.5868 W C) 0.3468 W D) 0.4568 W

Slotted line with tunable probe is not used to measure  a) VSWR b) Wavelength c) Power d) Impedance

A duplexer is used to  (A) Couple two antennas to a transmitter without interference (B) isolate the antenna from the local oscillator (C) prevent interference between two antennas connected to a receiver (D) use an antenna for reception or transmission without interference.

What type of instrument is used to measure dc voltage of the order 5 volts? (A) moving iron type (B) electro-static type (C) moving coil type (D) all of these

The register in the 8085A that is used to keep track of the memory address of the next op -code to be run in the program is the : a. stack pointer b. program counter c. accumulator d. None of above

Schering bridge is used to measure  (1) Frequency (2) Inductance (3) Capacitance (4) Mutual Inductance

Most commonly used filter in SSB generation are  (a) mechanical filters (b) RC filters (c) LC filters (d) low pass filters

The bridge used to measure the dielectric loss of an insulator is: A) Anderson bridge B) Wien’s bridge C) Schering bridge D) Any of the above

Shunt compensation in an EHV line is used to (A) Improve stability. (B) Improve the voltage profile. (C) Reduce the fault level. (D) Substitute for synchronous phase modifier.

An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic field having a component along the axis will be  (1) unaffected (2) decreased (3) increased (4) either decreased or increased depending on the direction of the DC field

The ALE line of an 8085 microprocessor is used to (A) latch the output of an I/O instruction into an external latch. (B) deactivate the chip-select signal from memory devices. (C) find the interrupt enable states of the TRAP interrupt. (D) latch the 8 bits of address lines AD7-AD0 into an external latch.

An audit trail  (1) is used to make backup copies (2) is the recorded history of operations performed on a file (3) can be used to restore lost information (4) none of these

An aquadog is used in a 'CRO' to collect -  a) Secondary emission electrons b) Primary emission electrons c) Both Primary and Secondary emission electrons d) None of the above

Which of the following devices is used to measure flow in an open channel ?   (a) Venturimeter (b) Rota meter (c) Orifice (d) Pitot tube

For a prototype low pass filter, the series and shunt elements are respectively _____.

The values of L and C for a low pass filter with cut off frequency of 2.5 KHz and operating with a terminated load resistance of 450 Ohm are given by  (a) 57.3 mH; 0.283 μF (b) 28.66 μH; 0.14 μF (c) 114.64 mH; 0.566 mF (d) 50.23 mH; 0.632 mF

Low pass filter with cut off frequency of 100 kHz and high pass filter with cut off frequency of 50 kHz are connected in tandem, the resultant filter is • Low pass filter with cut off frequency of 100 kHz • High pass filter with cut off frequency of 50 kHz • Band pass filter with pass band from 50 kHz to 100 kHz. • None of the above.

Angles in degrees of pole locations of 4th order Butterworth low pass filter approximation from either real axis are  A) +45,-45,+30,-30 B) +67.5,-67.5,+45,-45 C) +30,-30,+22.5,-22.5 D) +67.5,-67.5,+22.5,-22.5

Which capacitors are suitable for DC filter circuits?

write short notes on Low-pass filter.