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Power amplifiers and voltage amplifiers

Asked By: suryatej.22 | Asked On: Dec 2nd, 2008

What is the difference between power amplifier and voltage amplifier?

Answered by: Nishant on: Sep 2nd, 2014

• Voltage amplifiers have a high voltage gain, while power amplifiers have a high power gain. • In most voltage amplifiers, current gain is very low, while power amplifiers have a significant cur...

Answered by: ana_m on: Jan 24th, 2009

Power amplifiers basically amplify both current and voltage (p=v*i).Voltage amplifiers only amplify the voltage.

What type of architecture is used in 8085 microprocessor?

Asked By: puni | Asked On: Nov 20th, 2007

Answered by: SINDHUJA on: Sep 1st, 2014


Answered by: Sanjay Verma on: Sep 17th, 2013

Two architecture are being used which are von Neumann and Harvard. The difference is that von Neumann Architecture has common memory space for data and instructions while in Harvard it has separate memory for data and instructions.

Television communication

Asked By: rajanicd | Asked On: Jul 7th, 2010

What type of television communication is used in india?A) ntscb) palc) secamd) nstc

Answered by: sindhuja on: Sep 1st, 2014

Its pal

Answered by: abhisek on: Aug 7th, 2014

Phase Alternation Line by Line

What is the difference between emulator and simulator?

Asked By: ragav_sathish | Asked On: Aug 20th, 2007

Answered by: Anonymous on: Aug 5th, 2014

In my opinion, I think, Simulator is the machine which the function is same as Remote Tools that is to manage, views, or upgrading the system or the performance(s). Emulator is a machine that shows...

Answered by: bharath_p on: Jul 9th, 2009

Simulator: A software program impersonating a Hardware. Thus SIMULATING the scenarios faced in the original hardware.Emulator: A Hardware (with or without software) impersonating another Hardware. Thus ELIMINATING the need for the original.

Bridge rectifiers

Asked By: dikarthik | Asked On: Jan 30th, 2008

Why we are using the bridge rectifier in most of the circuits instead of full wave rectifier eventhough the output of both are same?

Answered by: HARENDRA K PUSHPAT on: Aug 4th, 2014

Because PIV rating of center tapped rectifier in twice then the bridge type of rectifier.

Answered by: cubangeekboy on: Nov 20th, 2008

Bridge rectifiers use transformer that do not employ a center tap, thereby permitting the use of smaller transformers. this saves space, cost and is more effecient.

What is meant by filter? What are the different types of filters?

Asked By: vrams | Asked On: Jul 31st, 2009

The output of the rectifier pulsating in nature, it consists of a desired DC component of voltage and unwanted ripple components. These ripple components are removed by placing filter circuit at the output of the rectifier.Types of filters: 1. Capacitor filter 2. Series inductor filter ...

Answered by: krishnakant on: Jul 30th, 2014

The o/p of the rectifier ckt is not pure dc its pulsating in nature to make the o/p pure dc smooth dc the filter circuit is connected to the o/p of rectifier Not only in the rectifier ckt but where e...

Answered by: kalaivani on: Nov 29th, 2013

Filter is used to remove the unwanted signals in the circuit


Asked By: gowri | Asked On: Mar 11th, 2009

Why are the 2 input terminals of an op-amp are called as inverting & non-inverting terminals?

Answered by: krishnakant on: Jul 30th, 2014

The differential amplifier can perform all the arithmetic operations such as addition subtraction even integration so need operational amplifier but basically it is a directly coupled high gain amplif...

Answered by: mangesh gadam on: Feb 1st, 2014

Opamp (operational amplifier)is a direct coupled high gain amplifier usually consisting of one or more differential amplifier

What is biasing?

Asked By: pushkar | Asked On: Jul 4th, 2006

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Editorial / Best Answer

Answered by: sachin.t.m

Answered On : Jul 6th, 2006

Biasing means applying the DC voltage across the device for its correct operation.

Answered by: krishnakant on: Jul 30th, 2014

In order to stabilize the q point and to make an electronic element properly operating a voltage or current source is applied to the diode or transistors called biasing.

Answered by: prashan on: Jul 30th, 2014

Biasing is used to stabilize the Q point, for operating the transistor in various mode like as amplifier, switch etc.,

What is meant by virtual ground in the op amp ?

Asked By: ragav_sathish | Asked On: Apr 17th, 2007

Answered by: krishnakant on: Jul 30th, 2014

In differential amplifier Va-Vb=0 when Vb is grounded the node Va will be on zero potential the condition is called virtual ground.

Answered by: Samarth on: May 1st, 2014

Ideally the output of op-amp should be zero. So for this to happen the 2 inputs must be same. Hence one of the input is considered to be low or at ground potential. But this input is not actually ground hence it is called as virtual ground.

Why the antenna is called passive element?

Asked By: archana | Asked On: Aug 7th, 2011

Answered by: krishnakant on: Jul 30th, 2014

A passive element cant generate energy of its own it can only respond or reacts when any active source such as current or voltage sourced is applied to it. An antenna is a passive element because it ...

Answered by: vikas on: Jul 3rd, 2014

Since the antenna require external power source for its working therefore it is called passive element

What is difference between microprocessor and microcontroller?

Asked By: Omkar Tirodkar | Asked On: Jul 2nd, 2014

Answered by: KRISHNAKANT on: Jul 30th, 2014

MP do not have any inbuilt memory storage but MC contains inbuilt memory storage.

MP cant perform boolean expressions but a MC performs

Answered by: Suriya Nataraj on: Jul 6th, 2014

A microprocessor has its interfacing components off the chip.
A micro controller is a microprocessor that is connected to its interfacing components on a single chip..This facility saves a lot of time..

Problem: 1. 1100v, 50hz,delta connected induction motor has a star connected slip ring rotor with stator to stator transformation ratio of 3.8 . The rotor resistance and stand still reactance are 0.012...

Asked By: AlHussein Abdallah | Asked On: Jul 16th, 2014

I. Rotor current and power factor at start with slip rings shorted. ii. Rotor current and power factor at 4% slip with slip rings shorted. iii. External rotor resistance per phase to obtain a starting current of 100a in stator supply lines.

Rom and ram cards

Asked By: Rujul | Asked On: Mar 18th, 2007

Which of the following is is used to hold rom and ram cards 1. Computer bus 2. Expansion cards 3. Mother board 4. Cache memory

Answered by: saqr on: Jul 10th, 2014

ROM is read only memory but ram is read accesses memory

Answered by: bb on: Jan 11th, 2014


Difference between 8085 and 8086 microprocessor?

Asked By: ggicollegepunjab | Asked On: Feb 23rd, 2012

Hi guys, give here your suggestion about microprocessor 8085 and 8086. These 2 processors used in old time. I want to know its program execution time, memory space.

Answered by: Digvijay Pandey on: Jul 1st, 2014

8085 is a 8 bit microprocessor which have 16 address line while 8086 is a 16 bit microprocessor which have 20 address line.

Answered by: Robiul on: May 27th, 2014

8085 is 8 bit microprocessor And 8086 is 16 bit microprocessor

Power factor correction

Asked By: hilarioushp | Asked On: Dec 18th, 2012

How the active power factor correction changes the wave shape of current drawn by a load to improve the power factor ?

Answered by: Sanjeev on: Jun 19th, 2014

The power factor correction device is known as power factor improver and the work is to reduce the extra reactive power usage by the load. When we purchase the power from the electricity companies th...

What is angle and amplitude modulation? What is noise in modulation?

Asked By: vikas | Asked On: Sep 30th, 2006

Answered by: T.S.GAGANDEEP on: Jun 8th, 2014

After the modulation process in the transmitter,modulated wave is given to the channel where noise is added externally and distorts the signal.So receiver must have the capability to reduce the noise,reconstruct the signal and reproducing the original modulating signal.

Answered by: Neeraj Kumar Mishra on: May 27th, 2014

Amplitude modulation is the process in which the amplitude of the carrier signal is changed according to the modulating signal.

How to format memory card

Asked By: nawazuddin | Asked On: Oct 23rd, 2013

How to format a memory card by using memory card

Answered by: ROBIN DAS on: Nov 1st, 2013

Connect your mobile to computer through data cable or through card reader. Right click on memory card click on format.

74ls244 is _____ 

Asked By: Interview Candidate | Asked On: Jun 21st, 2005

Answered by: sam on: Oct 13th, 2013

Ls ttl , buffer

Answered by: krishna on: Jun 15th, 2013

Low power schottkey ttl

What is a sequential circuit and what is a combinational circuit?Is there any difference between them? If yes what is it?

Asked By: madhu | Asked On: Jul 7th, 2007

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Editorial / Best Answer

Answered by: sweta basanta

Answered On : Sep 11th, 2007

Combinational circuit are those whose output depends only upon the present inputs but in sequential circuit the output depends upon both present and past inputs. that is the difference. 

Answered by: Mohit Maurya on: Sep 28th, 2013

Combinatorial circuits are those whose output depends on only present inputs but in Sequential circuits , there is concept of Memory Element .So in Sequential circuits output depends on both present inputs and previous outputs(stored in memory).

Answered by: satish mb on: Sep 25th, 2013

Combinational circuits are those whose output depends on only present inputs, sequential circuits are those whose output depends on both present inputs and previous outputs. in combinational circuits ...

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