How can sensitivity achieved on an IF amplifier stage of a heterodyne receiver?
Ignition Amplifier? . If you mean the Ignition Amplifier - it's a small rectangular Electronic part attached to the inner wing behind the battery - Bosch Part - about ï¿½50 to replace, they seem to go wrong at around 10/14 years - easy plug in replacement but use the heat sink conducting paste… supplied with a new unit. If you didn't mean the Ignition Amplifier - well - ignore all I've said. ( Full Answer )
A device used to make an instrament louder, usually an electric guitar.. Answer . Sound signals have a certain amplitude behind them (power). If the signal is week, it is difficult to hear and transmit. Therefore, you need an amplifier to add power to a signal in order for it to be heard and tra…nsmitted. . ( Full Answer )
The ability of an organism, or part of an organism, to detect changes in the environment is termed as sensitivity.. What is microphone sensitivity? . A microphone sensitivity specification tells how much electrical output in millivolts a microphone produces for a certain sound pressure input in d…B SPL. If two microphones are subject to the same sound pressure level and one puts out a stronger signal (higher voltage), that microphone is said to have higher sensitivity.. ( Full Answer )
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A superheterodyne receiver is a Radio Frequency receiver method that multiplies the received signal frequency with a local oscillator frequency to get frequencies that are the sum and difference of the 2 frequencies. For example, if the received signal is 5MHz and the local oscillator frequency is 4…MHz, they are multiplied together. 1MHz and 9MHz frequencies would be gotten. Usually the 1MHz is the Intermediate Frequency (IF). It will be admitted (through a band pass filter) later passed through the required electronic circuits for proper processing.. There is also the method of the Variable Tuned Filter. ( Full Answer )
These are the 3 criteria in choosing a good receiver. Sensitivity refers to the ability of the receiver to receive very weak signal. Selectivity to select the desired frequency and reject the others. lastly, Fidelity to produce good quality of signal without distortion.
A: The RC couple amplifier will probalbly not work if fed directly since the first amplifier can be sitting a some DC value which will offset the bias on the second amplifier therefore a capacitor is inserted to remove the DC component and allow AC to pass trough
If it has auxiliary inputs, such as a line level input, then yes, it should be able to serve as an amplifier. Be warned though that it probably won't work well as a guitar / instrument amplifier.
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connections are to be made per the crkt the main of this crkt is to make strong or to bost the signal comming to the crkt input is given with ac supply and they are connected to resistor and capacitor when the ac suppply is given it contains slight amount of dc supply so to block the dc supply c…apacitor is used and the dc supply is given at the collector so that resistor present at c and ground gets biased then another capacitor used at c to ground for removing the dc supply then out put seen on cro across collector to ground we get the perfect amplified signal the more we give the coupled amplifer the most amplfed sgnal we get ( Full Answer )
Amplifiers are used to strengthen analog signals. Analog signals become weaker after travelling a certain distance,they need to be amplified so that the data is not lost on the way and reaches intact.
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depends on whether you would like calculate or measured results. if you want calculated resulted, then your best bet would be to use an oscilloscope. if you want calculated results, then there are formulas for finding out the voltage, current, impedance, and individual results from each component us…ing the capacitive reactance, voltage, and type of transistor. are you using a summing transistor, inverting amplifying transistor, amplifying transistor, or a different transistor? also are you using DC or AC voltage or current?. you need to tell me what type of transistor you are using? ( Full Answer )
i think single stage rc couply amplifier is only used one transistor such as two stage rc couple amplifier
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When you combine signals of the same or different frequencies. The resulting energy will be each original frequency and the sum of the frequencies and a frequency that is the difference of the two signals. This is the basis of heterodyning. This allows us to take an information signal and "upconvert…" it to the RF realm for transmission. But the same processes can be used to "downconvert" or to beat one signal against the other to get a lower frequency representation of the energy.. After hererodyning came out, newer radios were sold as superheterodyning as a marketing ploy.. Sorry, but it is not more complex than that. This was back in the early 20th century and the idea of fair marketing or truthful processes were not legal issues like today.. Have a nice day. Bob ( Full Answer )
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In a two stage amplifier does the input impedance of the second stage affect the voltage gain of the first stage?
as i understand this impedance is something that impedes, or adds resistance or something like that. ( There are impedance bonds on the railroad to divide the track up into sections for signal purposes) by words, you see the connection with impede and impediment. the impedance, like resistance, woul…d have to be a factor to be reckoned with. I am only familiar with Impedance bonds-they are laid horizontally under the track structure, and are part of the signal system. ( Full Answer )
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Is this sentence supposed to be question? Any superheterodyne receiver will have an IF amplifier. It doesn't matter whether TV or radio.
Depends on what your definition of "receiver" is, but most of the time - to the amplifier. Consider: if the receiver is some form of a device that receives some signal, and then decodes it to audio, then the receiver will hook into the amplifier, which in turn will drive the speakers (so the s…peakers go to the amplifier) if, on the other hand, the receiver is a part of a wireless connection between the amplifier and speaker, then it really serves the role of a cable, so in essence you're again connecting the speakers to an amplifier (only using the receiver as an intermediary) You would have to specify your case. ( Full Answer )
A simple, 1 transistor single stage amplifier can be made using several resistors to bias a NPN or PNP transistor into its' linear operating region. With this done, a small voltage signal applied to the input of the amplifier will have the voltage amplified at the output in a linear fashion. I'm no…t sure what your question is; if this does not answer it let me know. ( Full Answer )
You can use an npn or a pnp bjt in a common emitter amplifier circuit. The decision of which one to use is based on whether you want the collector and base to be more positive (npn) or more negative (pnp) than the emitter.
When two frequencies are "mixed" the sum and the difference frequencies are produced. These frequencies are called heterodynes. If these frequencies are outside the range of human hearing they are said to be supersonic. The full name of a superhet receiver is supersonic heterodyne. This receiver use…s a mixer to produce an intermediate frequency outside the range of human hearing. Before superhets were in common use, but following from the old crystal set was an amplified form of the crystal set, called the 'Tuned Radio Frequency" receiver, or "TRF" for short. With many TRF receivers, a control called 'regeneration' controlled the gain of the RF amplifier, and could be turned up to the point that the entire radio set became unstable and oscillated, usually at the frequency you were tuned to. With the gain set just below the point of oscillation, these receivers were very sensitive. For listening to morse code signals, the control would be advanced just into the oscillation stage, and the difference in frequency between the received signal and the receiver's oscillation became a 'beat note', or a beeping sound, that was easy to receive in noisy conditions. This form of reception became known as 'heterodyne reception', and this type of radio was called a 'regenerative receiver'. Problem was, this operation usually required 3 hands, a still room and a lot of patience. Once tuned, the radio would drift in frequency, or burst into loud screaming oscillation, seemingly for no apparent reason. Sometime later, the 'super-regenerative' receiver was developed in an effort to simplify operation and these were used up into VHF frequencies into the early '30's. Eventually, with the development of better radio tubes and more elaborate design, the suphet rapidly became the most popular, as it was so easy to use. At last, you only needed one hand to operate a radio. And you could walk away and come back and it was still tuned to the station. This was the '30's where radios found their way into every westerner's living room, bringing news and entertainment to the masses (that could afford it). By the 60's, we all had 'transistors', and the superhet was everywhere. Now, most of us have TV, cable or satellite. And you know which process they all still use to turn the RF signal into a video signal that the screen can display? Just testing! ( Full Answer )
The Gain provided by the multistage amplifier is greater than the gain of single stage amplifier. The gain of the two stage amplifier is the product of the gain of the individual stages.
single stage amplifier contain only one stage transistor amplifier but multi stage contain more than one amplifier stage
What is the meaning of gain in an amplifier or operational amplifier. Is high gain or low gain is what we try to achieved?
There are many uses for amplifiers. Some try to achieve extremely high gain such as in a radio receiver. Many try to achieve no overall gain. Examples include mixers and filters. Some only try to achieve limited gain. Oscillators try to achieve zero gain at most frequencies but unity to very high ga…in at the frequency of oscillation depending on the output wave form required. Basically - everything in electronics is an amplifier. The absolute gain of am amplifier is the ratio of output signal to input signal. For voltage or current amplifiers this is usually expressed as field decibels which is 20 log (out/in). For power amplifiers the gain in decibels is 10 log (output power/input power). If the gain is less than one, the same rules apply but the decibels will turn out to be a negative quantity. ( Full Answer )
A: Feedback is a signal fed back from the output like from collector to the base .
Differential amplifier ANSWER: A differential amplifier is an op amp. If any amplification is required a preamplifier is used mainly to cut the white noise and improve the input impedance
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Why is the polarity of capacitors in RC coupled amplifiers such that the negative terminal receives the input signal?
The input signal is assumed to have zero DC bias. Input stages will typically have a positive bias on the base or grid, respectively, of the first stage transistor or tube. So, the input terminal is more negative. ANSWER: The polarity of the capacitor is determined by the bias polarity as used. If t…he bias is negative then the capacitor negative terminal must be connected to it. ( Full Answer )
You amplify by getting a microphone and speakers. Once you have played into the microphone i then amplifies into the speaker and a louder volume is created
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In a two stage amplifier the gain (ratio of the output to the input quantity) of the first stage is amplified again in the second stage so the gain of a two stage amp is the product of the gain of two individual stages which is sufficient enough to drive the output device as compared to a single sta…ge amplifier. ( Full Answer )
Biasing in a single stage common-emitter amplifier means to place the base-emitter current at a point where the collector-emitter current is in the middle of the transistor's linear range. First, you pick the target range and output impedance of the amplifier, picking the collector and emitter re…sistors. The gain of the stage is collector resistance divided by emitter resistance, limited by available hFe. You want to try to pick a resistor pair that will place the collector voltage in the center of the desired range, while keeping the desired operating current where you want it. Then, you pick the base resistor divider pair such that the base voltage is the forward bias drop of the base-emitter above (NPN) or below (PNP) the emitter voltage. You find that emitter voltage by considering the collector voltage, along with the operating current and the collector and emitter resistors. (Its straightforward Ohm's law, considering that the collector-emitter forms the third resistor in the divider chain.) You have to consider hFe in this calculation, as well as realizing that the two base resistors will form the input impedance of the stage. (Well, actually, base-emitter current is included in the input impedance calculation, but that is usually a small contribution if the hFe is high enough.) Then you need to consider the power dissipation in the stage, and make sure that the transistor can handle that, and that hFe will not drift unacceptably under temperature. (Stable designs are such that the hFe is far greater than the ratio of collector resistance over emitter resistance, so that your limits are based on ratio, and not on hFe. Problematic designs are when the desired gain is greater than hFe, such as when the emitter resistance is zero - this makes gain equal to hFe, and introduces the possibility of thermal runaway.) ( Full Answer )
It depends on the specific models of each, but typically, Yes. Of course you will need a 12VDC power supply for the amplifier, though. You will also need a AV receiver with a preamp output. You cannot run speaker level outputs into the input of an amplifier.
An 'amplifier' usually refers to an audio amplifier for a HiFi stereo system. (Although amplifiers are used in other devices, such as Radio transmitters, and is an electronic device for making a signal bigger.) A stereo amplifier usually has inputs for various signal sources, such as phono, micropho…ne, tuner, aux etc. It has outputs for speakers. It takes a small input signal and boosts it to drive a loudspeaker and has controls to select the input and alter the volume and tone. A receiver, generally refers to a dedicated radio receiver. It may have a choice of wavebands and a display to show what it is receiving. A receiver is a complete unit which has it's own loudspeakers or can drive external loudspeakers. A 'Tuner', on the other hand, is a radio receiver without it's own audio amplifier. The 'Tuner' is used as an input source for the amplifier. The amplifier may have a Tuner input, or you can use the 'Aux' input. ( Full Answer )
There are more than three amplifiers in a typical radio receiver. If, however, you are asking why there are three "stages" in the IF section, then the reason is that the IF section of a typical superhetrodyne receiver needs more bandwidth than can normally be provided by a single stage. As a resu…lt, there are usually three stages, each tuned slightly apart, so that you get a reasonable bandpass - otherwise, the demodulated signal will suffer. ( Full Answer )
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if we want to stop the dc voltage and pass the ac signal we must use coupling capacitor in an amplifier....
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After FM demodulation to the original AF signal it is necessary to amplify the weak AF signal to have enough power to drive speakers. That is the purpose.
Resistors are used in the single stage amplifier to bias the transistor for proper operation.
Some have a 220/120 switch on it's back displaying the 2 voltages. Sometimes the switch is 'locked' in place with a set screw into the side to prevent accidental movement. Another way is to purchase a voltage converter for this very purpose for travelers to difference voltage services. These may be …obtained from websites like amazon or stores possibly your local Home Depot or hardware store. They may be purchased for around $25 and last a lifetime of usage. . ( Full Answer )
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Why would one want to deliberately reduce the Q of the tuned circuits of the intermediate frequency amplifier stages of a receiver?
Because if the Q is too high the bandwidth available for the signalwill not be adequate. The passband of the IF amplifier requiressteep sides to reject interference, which requires several tunedcircuits, but the bandwidth is set by the type of signal beingpassed, e.g. 3 kHz for a voice communication…s circuit, 9 kHz for AMradio or 20 kHz for high-quality radio. ( Full Answer )
Do you mean with opamp circuits or tuned RF/IF amplifiers? In both cases several stages can be used to increase the gain. With opamp circuits though getting both wide bandwidth and high gain at the same time is difficult. With tuned RF/IF amplifiers two things can be done to get wide bandwidth: 1)… reduce the Q of the tuned coupling transformers connecting the stages and 2) stagger the tuning of the tuned coupling transformers connecting the stages so that some are detuned high while others are detuned low. ( Full Answer )