The conversion time of a 12 bit successive approximation A/D converter using a 1 MHz clock is

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The conversion time of a 12 bit successive approximation A/D converter using a 1 MHz clock is 12μs.

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A 12 bit counter type A/D converter uses a 1 MHz clock. Its maximum conversion time is

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A 12 bit counter type A/D converter uses a 1 MHz clock. If the full scale output is +10V, its resolution output is

Last Answer : A 12 bit counter type A/D converter uses a 1 MHz clock. If the full scale output is +10V, its resolution output is 2.44mV.

The A/D converter whose conversion time is independent of the number of bits is (A) Dual slope (B) Counter type (C) Parallel conversion (D) Successive approximation.

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Last Answer : Ans: C The A/D converter whose conversion time is independent of the Number of bits is Parallel conversion. (This type uses an array of comparators connected in parallel and comparators compare the input voltage at a particular ratio of the reference voltage).

The speed of conversion is maximum in (A) Successive-approximation A/D converter. (B) Parallel-comparative A/D converter. (C) Counter ramp A/D converter. (D) Dual-slope A/D converter.

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Last Answer : Ans: B The speed of conversion is maximum in Parallel-comparator A/D converter (Speed of conversion is maximum because the comparisons of the input voltage are carried out simultaneously.)

The conversation speed of an analog to digital converter is maximum with the following technique. (A) Dual slope AD converter. (B) Serial comparator AD converter. (C) Successive approximation AD converter. (D) Parallel comparator AD converter.

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In successive-approximation A/D converter, offset voltage equal to 1/2 LSB is added to the D/A converter’s output. This is done to (A) Improve the speed of operation. (B) Reduce the maximum quantization error. (C) Increase the number of bits at the output. (D) Increase the range of input voltage that can be converted

Description : In successive-approximation A/D converter, offset voltage equal to 1/2 LSB is added to the D/A converter's output. This is done to (A) Improve the speed of operation. (B) Reduce the maximum ... Increase the number of bits at the output. (D) Increase the range of input voltage that can be converted

Last Answer : (B) Reduce the maximum quantization error.

In successive approximation converter input to the comparator is through

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Last Answer : In successive approximation converter input to the comparator is through DAC 

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Last Answer : An 8 bit converter type A/D converter makes at least 8000conversions/sec. The clock frequency used is 2MHz.

The resolution of a 12 bit D/A converter using a binary ladder is

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Consider a 32 - bit microprocessor, with a 16 - bit external data bus, driven by an 8 MHz input clock. Assume that the microprocessor has a bus cycle whose minimum duration equals four input clock cycles. What is the maximum data transfer rate for this microprocessor? (A) 8x106 bytes/sec (B) 4x106 bytes/sec (C) 16x106 bytes/sec (D) 4x109 bytes/sec

Description : Consider a 32 - bit microprocessor, with a 16 - bit external data bus, driven by an 8 MHz input clock. Assume that the microprocessor has a bus cycle whose minimum duration equals four input clock cycles. What ... (A) 8x106 bytes/sec (B) 4x106 bytes/sec (C) 16x106 bytes/sec (D) 4x109 bytes/sec 

Last Answer : (B) 4x106 bytes/sec

Where can I find the detailed information about Successive Approximation method and discrete newton method？?

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Last Answer : answer:A DISCRETE NEWTON ALGORITHM FOR MINIMIZING A FUNCTION OF MANY VARIABLES SUCCESSIVE APPROXIMATIONS

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Description : Where are the successive approximation type ADC’s used?

Last Answer : The Successive approximation ADCs are used in applications such as data loggers & instrumentation where conversion speed is important.

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Description : Explain in brief the principle of operation of successive Approximation ADC.

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Successive approximation technique is used for

Description : Successive approximation technique is used for

Last Answer : Successive approximation technique is used for A to D Conversion

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Last Answer : C. 70 MHz

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Description : What is the common up-converter and down-converter IF for microwave communications? A. 60 MHz B. 80 MHz C. 120 MHz D. 70 MHz

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The catalytic converter for conversion of SO2 to SO3 by contact process should have a feed with SO2 content between (A) 2-5 % (B) 7-10 % (C) 12-15 % (D) 20-25 %

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Last Answer : (B) 7-10 %

The maximum clock frequency is _ a. 45 MHZ b. 50 MHZ c. 52 MHZ d. 68 MHZ

Description : The maximum clock frequency is _ a. 45 MHZ b. 50 MHZ c. 52 MHZ d. 68 MHZ

Last Answer : b. 50 MHZ

In 8085 microprocessor, the digit 5 indicates that the microprocessor needs (1) -5 volts, +5 volts supply (2) +5 volts supply only (3) -5 volts supply only (4) 5 MHz clock

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Last Answer : Answer: 2

The clock frequency of an 8085 microprocessor based system is 3 MHz. What should be the minimum pulse

Description : The clock frequency of an 8085 microprocessor based system is 3 MHz. What should be the minimum pulse width of the INTR signal so that it is recognized successfully? A) 5.6 µs B) 5.7 µs C) 5.8 µs D) 5.9 µs

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Classification of protocol that interprets a frame of data as a group of successive bit combined into predetermined pattern of fixed length, usually 8 bits each.

Description : Classification of protocol that interprets a frame of data as a group of successive bit combined into predetermined pattern of fixed length, usually 8 bits each.

Last Answer : Character and Byte-oriented protocols

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Last Answer : Ans: D The code where all successive numbers differ from their preceding number by single bit is Gray Code. (It is an unweighted code. The most important characteristic of this code is that only a single bit change occurs when going from one code number to next.)

Julie is going on an extended trip for three weeks. She lives in a remote area where there are frequent electrical power outages which can last up to three or four days. Julie has quite a bit of food in her freezer which would go bad if it thawed and then re-froze. She does have digital clock and a VCR which would flash 12:00 if the power went out. Unfortunately the clock and VCR flash even if the power only goes out for a few seconds. What can Julie do so that when she returns home she will be able to determine whether the power was out long enough to thaw her food? Asking a neighbor whether the power was out, isn't a reliable option because the nearest house is half a mile away, and one house may have power, while another house may have no power. She won?t be able to have a neighbor chec

Description : Julie is going on an extended trip for three weeks. She lives in a remote area where there are frequent electrical power outages which can last up to three or four days. Julie has quite a bit of food ... power, while another house may have no power. She won?t be able to have a neighbor chec -Riddles

Last Answer : One thing Julie could do is freeze a tray of ice-cubes, and turn the tray of ice upside down in her freezer. When she comes home, she should check the tray. If the ice cubes are still in the ... clean out the freezer. She will have to make a judgment call if the ice-cubes are only slightly thawed.

A device that connects two dissimilar networks and performs the protocol conversion. A. Gateway B. Coupler C. Transformer D. Converter

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Fauser Montecatini converter is used for (A) Ammonia synthesis (e.g. at FCI Sindri, India) (B) Methanation of CO and CO2 (C) Shift conversion (i.e. CO to CO2 ) (D) None of these

Description : Fauser Montecatini converter is used for (A) Ammonia synthesis (e.g. at FCI Sindri, India) (B) Methanation of CO and CO2 (C) Shift conversion (i.e. CO to CO2 ) (D) None of these

Last Answer : (A) Ammonia synthesis (e.g. at FCI Sindri, India)

Automobile exhaust is passed through two compartments catalytic converter employing platinum as catalyst for (A) Conversion of CO into CO2 in the second compartment (B) Conversion of NOx into N2 and NH3 in the first compartment (C) Oxidation of unburnt hydrocarbon fuel in the second compartment (D) All (A), (B) and (C)

Description : Automobile exhaust is passed through two compartments catalytic converter employing platinum as catalyst for (A) Conversion of CO into CO2 in the second compartment (B) Conversion of NOx into N2 and NH3 in the first ... of unburnt hydrocarbon fuel in the second compartment (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

In the converter of the contact process for the manufacture of H2SO4 the equilibrium conversion of SO2__________ (i) __________ with increase in temperature and __________ (ii) __________ with increase in the mole ratio of SO2 to air. (A) (i) increases (ii) decreases (B) (i) decreases (ii) increases (C) (i) increases (ii) increases (D) (i) decreases (ii) decreases

Description : In the converter of the contact process for the manufacture of H2SO4 the equilibrium conversion of SO2__________ (i) __________ with increase in temperature and __________ (ii) __________ with increase in the mole ratio ... increases (C) (i) increases (ii) increases (D) (i) decreases (ii) decreases

Last Answer : (B) (i) decreases (ii) increases

Conversion of SO2 to SO3 in Monsanto 4-pass converter is about __________ percent. (A) 80 (B) 90 (C) 98 (D) 100

Description : Conversion of SO2 to SO3 in Monsanto 4-pass converter is about __________ percent. (A) 80 (B) 90 (C) 98 (D) 100

Last Answer : (C) 98

In multistage equilibrium conversion of SO2 to SO3 (2SO2 + O2 ⇌ 2SO3 ), the reverse reaction becomes appreciable at a temperature of 550° C. The percentage equilibrium conversion of SO2 to SO3 can be increased by (A) Increasing the oxygen concentration (B) Putting more quantity of V2O5 catalyst in the converter (C) Removing some quantity of SO3 during intermediate stage (D) Maintaining low temperature & pressure in the converter

Description : In multistage equilibrium conversion of SO2 to SO3 (2SO2 + O2 ⇌ 2SO3 ), the reverse reaction becomes appreciable at a temperature of 550° C. The percentage equilibrium conversion of SO2 to ... some quantity of SO3 during intermediate stage (D) Maintaining low temperature & pressure in the converter

Last Answer : (C) Removing some quantity of SO3 during intermediate stage

Pick out the wrong statement. (A) Conversion of SO2 to SO3 in Monsanto-4 pass converter is about 98% (B) The chemical formula of oleum is H2S2O7 , which is formed by saturating sulphuric acid with sulphur trioxide (C) Vitriol oil is nothing but technical sulphuric acid (D) Decomposition of sulphuric acid on heating does not start before its boiling

Description : Pick out the wrong statement. (A) Conversion of SO2 to SO3 in Monsanto-4 pass converter is about 98% (B) The chemical formula of oleum is H2S2O7 , which is formed by saturating ... but technical sulphuric acid (D) Decomposition of sulphuric acid on heating does not start before its boiling

Last Answer : (D) Decomposition of sulphuric acid on heating does not start before its boiling

Multistage catalytic converter is not used in the (A) Conversion of SO2 to SO3 (B) NH3 synthesis reaction (C) Both (A) and (B) (D) Neither (A) nor (B)

Description : Multistage catalytic converter is not used in the (A) Conversion of SO2 to SO3 (B) NH3 synthesis reaction (C) Both (A) and (B) (D) Neither (A) nor (B)

Last Answer : (B) NH3 synthesis reaction

The total transportation cost in an initial basic feasible solution to the following transportation problem using Vogel’s Approximation method is (A) 76 (B) 80 (C) 90 (D) 96

Description : The total transportation cost in an initial basic feasible solution to the following transportation problem using Vogel’s Approximation method is  (A) 76 (B) 80 (C) 90 (D) 96

Last Answer : (B) 80

Consider the following transportation problem: Image The initial basic feasible solution of the above transportation problem using Vogel’s Approximation Method(VAM) is given below: The solution of the above problem: (A) is degenerate solution (B) is optimum solution (C) needs to improve (D) is infeasible solution

Description : Consider the following transportation problem: The initial basic feasible solution of the above transportation problem using Vogel's Approximation Method(VAM) is given below: The solution of the ... degenerate solution (B) is optimum solution (C) needs to improve (D) is infeasible solution

Last Answer : (B) is optimum solution

Consider the following transportation problem : The transportation cost in the initial basic feasible solution of the above transportation problem using Vogel’s Approximation method is : (A) 1450 (B) 1465 (C) 1480 (D) 1520

Description : Consider the following transportation problem :  The transportation cost in the initial basic feasible solution of the above transportation problem using Vogel’s Approximation method is : (A) 1450 (B) 1465 (C) 1480 (D) 1520

Last Answer : (B) 1465

Which of the following statement(s) is/are correct with reference to curve generation? I. Hermite curves are generated using the concepts of interpolation. II. Bezier curves are generated using the concepts of approximation. III. The Bezier curves lies entirely within the convex hull of its control points. IV. The degree of Bezier curve does not depend on the number of control points. (A) I, II and IV only (B) II and III only (C) I and II only (D) I, II and III only

Description : Which of the following statement(s) is/are correct with reference to curve generation? I. Hermite curves are generated using the concepts of interpolation. II. Bezier curves are generated using the concepts of approximation. III. The ... (B) II and III only (C) I and II only (D) I, II and III only

Last Answer : (D) I, II and III only

The number of comparators required in a 3-bit comparator type analog to digital converter is

Description : The number of comparators required in a 3-bit comparator type analog to digital converter is  A) 2 B) 3 C) 7 D) 8 

Last Answer : Number of comparators =2^n -1= 2^3 -1=7

In a weighted-resistor digital-to-analog converter with 8-bit input, if the resistance corresponding to the MSB

Description : In a weighted-resistor digital-to-analog converter with 8-bit input, if the resistance corresponding to the MSB is 2K, what will be the resistance corresponding to the LSB?  (a) 250 Ω (d) 512 KΩ (c) 256 KΩ (d) 25.5 Ω

Last Answer : In a weighted-resistor digital-to-analog converter with 8-bit input, if the resistance corresponding to the MSB is 2K, what will be the resistance corresponding to the LSB?  (a) 250 Ω (d) 512 KΩ (c) 256 KΩ (d) 25.5 Ω

The percent resolution of an 8 -bit D/A converter is

Description : The percent resolution of an 8 -bit D/A converter is

Last Answer : The percent resolution of an 8 -bit D/A converter is 0.392

A 4-bit R/2R digital-to-analog (DAC) converter has a reference of 5 volts. What is the analog output for the...

Description : A 4-bit R/2R digital-to-analog (DAC) converter has a reference of 5 volts. What is the analog output for the input code 1010:  (1) 0.3125 V (2) 3.125 V (3) 0.78125 V (4) –3.125 V

Last Answer : 3.125V

Integrating principle in the digital measurement is the conversion of

Description : Integrating principle in the digital measurement is the conversion of   (a) Voltage to time (b) Voltage to frequency (c) Voltage to current (d) Current to voltage

Last Answer : Integrating principle in the digital measurement is the conversion of Voltage to frequency

A 10 bit resistive divider is constructed such that the current through...

Description : A 10 bit resistive divider is constructed such that the current through the LSB resistor is 100μA. The maximum current that will flow through the MSB resistor is 

Last Answer : A 10 bit resistive divider is constructed such that the current through the LSB resistor is 100μA. The maximum current that will flow through the MSB resistor is 51.2mA.

What synchronization is provided so that the start and end of message is identified? A. Carrier B. Character C. Bit D. Clock

Description : What synchronization is provided so that the start and end of message is identified? A. Carrier B. Character C. Bit D. Clock

Last Answer : B. Character

Asynchronous protocol is A. message oriented B. clock oriented C. bit oriented D. character oriented

Description : Asynchronous protocol is A. message oriented B. clock oriented C. bit oriented D. character oriented

Last Answer : D. character oriented

How many clock pulses are required to output a 4-bit number in serial form?

Description : How many clock pulses are required to output a 4-bit number in serial form?

Last Answer : Four.

Each flip-flop in a 4-bit ripple counter introduces a maximum delay of 40 n sec. The maximum clock frequency

Description : Each flip-flop in a 4-bit ripple counter introduces a maximum delay of 40 n sec. The maximum clock frequency is (a) 2.65 MHz (b) 6.25 MHz (c) 5.26 MHz (d) 6.52 MHz 

Last Answer : Each flip-flop in a 4-bit ripple counter introduces a maximum delay of 40 ns. The maximum clock frequency is 6.25MHz. nff  * Tdelay = 4*40 =160ns so, max. frequency = 1/ (200*10-9 ) = 6.25MHz          

What is the required quality factor for an SSB filter with the following data: center frequency= 1 MHz, the desired attenuation level of the unwanted sideband= 80 dB and the separation between sidebands= 200 Hz? A. 1,250 B. 12,500 C. 125,000 D. 25,000

Description : What is the required quality factor for an SSB filter with the following data: center frequency= 1 MHz, the desired attenuation level of the unwanted sideband= 80 dB and the separation between sidebands= 200 Hz? A. 1,250 B. 12,500 C. 125,000 D. 25,000

Last Answer : C. 125,000

Which one of the following statements best defines an estimate? a. An approximation of project time and cost targets, refined throughout the project life cycle. b. A prediction of a future condition or event based on information or knowledge available now. c. The value of useful work done at any given point in a project to give a measure of progress. d. A situation that affects or influences the outcome of the project expressed in time or cost terms

Description : Which one of the following statements best defines an estimate? a. An approximation of project time and cost targets, refined throughout the project life cycle. b. A prediction of a future ... . A situation that affects or influences the outcome of the project expressed in time or cost terms

Last Answer : a. An approximation of project time and cost targets, refined throughout the project life cycle.

Which one of the following statements best defines an estimate? a. An approximation of project time and cost targets, refined throughout the project life cycle. b. A prediction of a future condition or event based on information or knowledge available now. c. The value of useful work done at any given point in a project to give a measure of progress. d. A situation that affects or influences the outcome of the project expressed in time or cost terms.

Description : Which one of the following statements best defines an estimate?  a. An approximation of project time and cost targets, refined throughout the project life  cycle.  b. A prediction of a future ... . A situation that affects or influences the outcome of the project expressed in time or cost terms.

Last Answer : a. An approximation of project time and cost targets, refined throughout the project life  cycle.