# In a sample-and-hold circuit, the aperture time is

29 views
In a sample-and-hold circuit, the aperture time is (A) time required following a sample (B) time required for the switch to open (C) transition time interval between sample and hold (D) time from the hold command to the opening of the switch

## Related questions

Sample -and -hold circuits in ADCs are designed to : - a) sample and hold the output of the binary counter during the conversion process b) stabilize theAD Cs threshold c) voltage during the conversion process stabilize the input analog d) signal during the conversion process sample and hold the ADC staircase waveform during the conversion process

If resistance is 20 Q. and inductance is 27 in a R-L series circuit, then time constant of this circuit will be?

In a particular circuit connection, AWG 18 wire is selected over AWG 22. The reason is that it is having

In D/A converter, the resolution required is 50mv and the total maximum input is 10v. The number of bits required is   (A) 7 (B) 8 (C) 9 (D) 200

The switch in the circuit has been closed for a long time. It is opened at t = 0. At t = 0+, the current through the 1 micro farad capacitor is A) 0A B) 1A C) 1.25A D) 5A

Time constant of a circuit is the time in seconds taken after the application of voltage to each?

For a traction transformer circuit breaker state: 1) Rated current and rupturing capacity 2) Any two tests it should be capable of withstanding 3) Overall tripping time and relay time.

In flame atomizer the sample is converted into fine spray by (A) burner (B) fuel (C) nebulizer (D) none of these

The interrupting time of a circuit breaker is the period between the instant of  (A) initiation of short circuit and the arc extinction on an opening operation (B) energizing of the trip circuit and the arc extinction on an opening operation (C) initiation of short circuit and the parting of primary arc contacts (D) energizing of the trip circuit and the parting of primary arc contacts

The time constant of a series R-C circuit is given by?

Reason for the larger size of the earth terminal of a normal house hold plug is:  A) To make first contact during plugging in B) To maintain contact up to the last point during the removal of plug C) To carry larger current incase of a fault D) All of the above

A Two-Port Network is said to be symmetrical when the following equalities hold good (A) Z11 = Z22 and Z12 = Z21 (B) Z11 = Z22 (C) Y12 = Y21 (D) Y11 = Y22 and Y12 = Y21

Enlist the different modes of operation of electronic counters and explain any two modes in details.

Explain the basic dual slope ADC technique used in digital multimeters with its diagram and measurement cycle.

Describe the various blocks and their functions in pipelined ADC architecture.

Time Domain Reflectometry (TDR)

If Moor's law continues to hold, predict the approximation number of transistor per leading edge IC in the year. 1.2030 2.2050

To a highly inductive circuit, a small capacitance is added in series. The angle between voltage and current will _____.

A reading of 120 is obtained when a standard inductor was connected in the circuit of a Q-meter and the variable capacitor is adjusted to a value of 300 pF. A lossless capacitor of unknown value Cx is then connected in parallel with the variable capacitor and the same reading was obtained when the variable capacitor is readjusted to a value of 200 pF. The value of Cx in pF is  A) 100 B) 200 C) 300 D) 500

A voltage signal 10 Sinwt is applied to the circuit with ideal diodes, as shown in figure. The maximum and minimum values of the output waveform vout of the circuit are respectively

What is the RMS voltage in a series RL circuit, if the voltage across R and L is 256 V and 192 V respectively? A) 320 V B) 448 V C) 64 V D) None of these

Consider a circuit with four 10 Ω resistors connected in parallel and the current flowing through the circuit is 5 A. What will be the current if the above 4 resistors are connected in parallel? A) 5 A B) 50 A C) 500 A D) None of these

In a clipper circuit with silicon diode and bias of V volts, the clipping level is (a) 0.7 V (c) V (b) V + 0.7 (d) 2V + 0.7

In a series RLC circuit, the rms value of voltage across the resistor is 30 V, across the inductor is 60 V and across the capacitor is 20 V. The rms supply voltage would be (A) 110 V (B) 10 V (C) 220 V (D) 50 V

In a series RC circuit, 12 V (rms) is measured across.the resistor and 15 V (rms) is measured across the capacitor. The value of rms source voltage is: A. 3 V B. 27 V C. 19.2 V D. 1.9 V

In a Y -connected circuit, between each line -voltage and the nearest phase - voltage, there is a phase -angle of: A. 0° B. 30° C. 60° D. 120°

The apparent power drawn by an A.C. circuit is 10 kVA and active power is 8 kW. The reactive power in the circuit is?

The power consumed in a circuit element will be least when the phase difference between the current and voltage is?

Draw power and control circuit for definite time-limit starter for slip-ring induction motor. Explain its working.

If the secondary turns of a transformer are doubled and at the same time primary voltage is reduced to half then the secondary voltage will

A pulse waveform has a high time of 8 ms and a pulse width of 32 ms. The duty - cycle is equal to: A. 25% B. 50% C. 1% D. 100%

D.C. motor is to drive a load which has certain minimum value for most of the time and some peak value for short duration. We will select the?

A thin P-type silicon sample is uniformly illuminated with light which generates excess carriers. The recombination rate is directly proportional to (A) the minority carrier mobility (B) the minority carrier recombination lifetime (C) the majority carrier concentration (D) the excess minority carrier concentration

The time constant for the  given circuit is A) 1/9 S B) 1/4 S C) 4S D) 9S

Circuit turn-off time of an SCR is defined as the time  (A) taken by the SCR turn to be off (B) required for the SCR current to become zero (C) for which the SCR is reverse biased by the commutation circuit (D) for which the SCR is reverse biased to reduce its current below the holding current

The time constant of an RC circuit is defined as the time taken by the voltage across the capacitor to become_____ of its final value   (a) 63.2% (b) 36.8% (c) 50% (d) 100%

What is the time constant of an RC series circuit?  (A) R/C (B) C/R (C) 1/RC (D) RC

The time constant of the capacitance circuit is defined as the time during which voltage?

In 8 bit successive approximation ADC, clock frequency is 1MHz and reference voltage is 10 V.Conversion time in µS for 5 V input is  A) 4 B) 8 C) 10 D) None of these

Turn-on time of an SCR in series with RL circuit can be reduced by   (a) Increasing circuit resistance R (b) Decreasing R (c) Increasing circuit inductance L (d) Decreasing L

An antenna located in a city is a source of radio waves. How much time does it take the wave to reach a town 12,000 km away from the city?  a. 36 s b. 20 us c. 20 ms d. 40 ms

The critical clearing time of a fault in power system is related to   (a) Reactive power limit (b) Steady state stability limit (c) Short-circuit current limit (d) Transient stability limit

In electric traction for a trapezoidal speed-time curve, the time period is (A) free running speed period = constant speed period (B) free running period = coasting period (C) free running period + coasting period = constant speed period (D) average speed period = scheduled speed period