Define free running mode .

Define free running mode .
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Answer :

An interactive computer mode that allows more than one user to have simultaneous use of a program.
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Description : The different angles of entry of light into an optical fiber when the diameter of the core is many times the wavelength of the light transmitter is known as ________. A. refraction B. sensor C. mode D. emitter

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Last Answer : A. space or direct

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Description : List the applications of 555 timer in Astable mode of operation

Last Answer : *FSK generator  *Pulse-position modulator

List the applications of 555 timer in monostable mode of operation

Description : List the applications of 555 timer in monostable mode of operation

Last Answer : *missing pulse detector *Linear ramp generator *Frequency divider *Pulse width modulation.

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Description : A single conductor running from the transmitter to the antenna. A. RG-8/U B. Single line wire C. Twin-lead D. MIcrostrip

Last Answer : B. Single line wire

When I put my PC (running Windows XP) into hibernate mode at night, I find that it spontaneously awakens by the morning.

Description : When I put my PC (running Windows XP) into hibernate mode at night, I find that it spontaneously awakens by the morning.

Last Answer : That happens to me sometimes too. It puzzled the hell out of me until I noticed the cat hairs on the keyboard.

When the form is running in DEBUG mode, If you want to examine the values of global variables and other form variables, What package procedure command you would use in your trigger text ?

Description : When the form is running in DEBUG mode, If you want to examine the values of global variables and other form variables, What package procedure command you would use in your trigger text ?

Last Answer : Break. SYSTEM VARIABLES

Define Piezoelectric effect.

Description : Define Piezoelectric effect.

Last Answer : When applying mechanical energy to some type of crystals called piezoelectric crystals the mechanical energy is converted into electrical energy is called piezoelectric effect.

Define non-inverting amplifier?

Description : Define non-inverting amplifier?

Last Answer : The input is applied to the non-inverting input terminal and the inverting terminal connected to the ground.

Define slew rate?

Description : Define slew rate?

Last Answer : Slew rate can be defined as the maximum rate of change of output voltage of op-amp with respect to time.

Define input bias current?

Description : Define input bias current?

Last Answer : It is defined as the average of the currents entering into the input terminals of an op-amp.

Define input offset current?

Description : Define input offset current?

Last Answer : It is defined as the algebraic difference between the current entering the inverting and non-inverting terminal of an op-amp.

Define input offset voltage?

Description : Define input offset voltage?

Last Answer : It is defined as the voltage that must be applied between the input terminals of an op-amp to nullify the output.

Define loading?

Description : Define loading?

Last Answer : A large value of Rc cannot be used in a circuit since,a large value of resistance requires a large chip area.For large Rc, quiescent drop across it increases and hence a large power supply is required ... source can also be used as an active load for an amplifier to obtain a very large voltage gain.

Define current amplification factor?

Description : Define current amplification factor?

Last Answer : It is defined as the ratio of change in output current to the change in input current at constant other side voltage.

Define PIV .

Description : Define PIV .

Last Answer : Peak inverse voltage is the maximum reverse voltage that can be applied to the PN junction without damage to the junction.

Define the term diffusion current?

Description : Define the term diffusion current?

Last Answer : A concentration gradient exists, if the number of either electrons or holes is greater in one region of a semiconductor as compared to the rest of the region. The holes and electron ... concentration. This process in called diffusion and the current produced due this movement is diffusion current.

Define drift current?

Description : Define drift current?

Last Answer : When an electric field is applied across the semiconductor, the holes move towards the negative terminal of the battery and electron move towards the positive terminal of the battery. This drift movement of charge carriers will result in a current termed as drift current.

Define Monostable Multivibrators

Description : Define Monostable Multivibrators

Last Answer : The monostable multivibrator or one –shot requires an external signal called a trigger to force the circuitinto a quasi stable state for a particular time or delay.

Define Astable Multivibrators.

Description : Define Astable Multivibrators.

Last Answer : The astable Multivibrators toggles between one state and the other without the influence of any other external control signal. It is also called as free running multivibrator.

Define Multivibrators. Mention its types.

Description : Define Multivibrators. Mention its types.

Last Answer : Multivibrators are regenerative circuits, Which are mainly used in timing applications. Based on their operational characteristics they can be classified into • Astable Multivibrators • Monostable Multivibrators • Bistable Multivibrators

Define load regulation.

Description : Define load regulation.

Last Answer : Load regulation is defined as the change in output voltage for a change in load current. It is expressed in millivolts or as a percentage of the output voltage. 

Define line regulation.

Description : Define line regulation.

Last Answer : Line regulation is defined as the percentage change in the output voltage for a change in the input voltage.It is expressed in millivolts or as a percentage of the output voltage. 

Define slope overload noise and granular noise.

Description : Define slope overload noise and granular noise.

Last Answer : Slope overload noise is introduced due to the use of a step size delta is too small To follow some portions of the waveform with a step size.   Granular noise results from using a step size that is too large in parts of the waveform having a small slope. 

Define Delta modulation.

Description : Define Delta modulation. 

Last Answer : Delta modulation is a technique in which derivative of the signal is quantized. The delta modulation shows slope overload for fast input signals and their performance is dependent on input signal frequency.

Define Dither.

Description : Define Dither.

Last Answer : It is a very small amount of random noise(white noise) which is added to the input before A/D conversion to improve the performance of A/D converter.

Define quantization error.

Description : Define quantization error.

Last Answer : In A/D converter the smallest digital step is due to the LSB and it can be made smaller only by increasing the number of bits in the digital representation. This error is called quantization error.

Define sample period and hold period.

Description : Define sample period and hold period.

Last Answer : The time during which the voltage across the capacitor in sample and hold circuit is equal to the input voltage is called sample period.The time period during which the voltage across the capacitor is held constant is called hold period. 

Define accuracy of converter.

Description : Define accuracy of converter.

Last Answer : Absolute accuracy: It is the maximum deviation between the actual converter output & the ideal converter output.  Relative accuracy: It is the maximum deviation after gain & offset errors have been removed. ... of a converter is also specified in form of LSB increments or % of full scale voltage.

Define resolution of a data converter.

Description : Define resolution of a data converter.

Last Answer : The resolution of a converter is the smallest change in voltage which may be produced at the output or input of the converter. Resolution (in volts)= VFS/2n-1=1 LSB increment. The resolution of an ADC is defined as the smallest change in analog input for a one bit change at the output.

Define conversion time.

Description : Define conversion time.

Last Answer : conversion time of a successive approximation type ADC is given by  T(n+1)  where T---clock period  Tc---conversion time  n----no. of bits

Define Voltage to Frequency conversion factor.

Description : Define Voltage to Frequency conversion factor. 

Last Answer : Voltage to Frequency conversion factor is defined as,  Kv = fo / Vc= 8fo /Vcc  Vc is the modulation voltage  fo frequency shift

Define Pull-in time.

Description : Define Pull-in time.

Last Answer : The total time taken by the PLL to establish lok is called pull-in time.It depends on the initial phase and frequency difference between the two signals as well as on the overall loop gain and loop filter characteristics

Define capture range of PLL.

Description : Define capture range of PLL.

Last Answer : The range of frequencies over which the PLL can acquire lock with an input signal is called the capture range. It is expressed as a percentage of the VCO free running frequency.

Define lock-in range of a PLL.

Description : Define lock-in range of a PLL.

Last Answer : The range of frequencies over which the PLL can maintain lock with the incoming signal is called the lock-in range or tracking range. It is expressed as a percentage of theVCO free running frequency.

Define FSK modulation.

Description : Define FSK modulation.

Last Answer : FSK is a type of frequency modulation ,in which the binary data or code is transmitted by means of a carrier frequency that is shifted between two fixed frequency namely mark(logic1) and space frequency(logic 0).