Which of the following is a characteristic of digital signal?

Its waveform is a continuous function

The maximum number of signals that can be produced by N bits is 2 N-1

There is no loss of value after converting an analog signal to digital signal

Consider an N-bits ADC (Analog to Digital Converter) whose analog input varies from 0 to Vmax, then which of the following is not true?

The least significant bit correspond to a change of V max /2 N -1 in the analog signal

The resolution of the ADC is V max /2 N -1

The maximum error in the conversion (or quantization error) is V max /2(2 N -1)

An electrical signal can be represented in either Thevenin form or Norton From. However, Thevenin representation is preferred when

The load resistance is very large as compared to the source resistance

The load resistance is very low compared to the source resistance

Both of the cases mentioned are the preferred case

An electrical signal can be represented in either Thevenin form or Norton From. However, Norton representation is preferred when

The load resistance is very large as compared to the source resistance

The load resistance is very low as compared to the source resistance

Both of the cases mentioned are the preferred case

Consider the DAC (digital to Analog Converter) shown below. Where b 1 , b 2 ….b n can be either 0 or 1. (Q.7 to Q.9) Q. What will be the value of the output current io, if the digital signal is in the form of b1b2b3…bn

Vref/2R (b1/2+ b2/4 + b3/8….+bn/(2 N ))

2Vref/R (b1/2+ b2/4 + b3/8….+bn/(2 N ))

Vref/R (b1/2+ b2/4 + b3/8….+bn/(2 N ))

For v ref = 10V, n = 6, and R= 5000 ohm, which of the following is true?

The maximum value of the output current is 1.9375 mA

The change in the output current if the LSB is changed from 0 to 1 is 0.03125 mA

The change in the output current is the MSB is change from 0 to 1 is 0.5 mA

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