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Characteristic of pnp transistor in common emitter mode precautino and sources of error?
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∙ 11y ago
pnp transister in common emitter mode
Wiki User
∙ 11y ago
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What is characteristics of current source?
The characteristic of the current sources is that it cannot operate in an pen circuit.
What is the best way to describe the function of a typical transistor in an electronic circuit?
A transistor in a circuit can do many things. It can be used to amplify voltage signals, or current signals, create current and voltage sources, make buffers, and so on. Transistors also find a major use in logic circuits (ie, where signals can either be a '0' or a '1'), where they essentially act as a switch, and can be used to create inverters, AND gates, OR gates, and all sorts of useful components. By itself, a transistor is a three-terminal device that can control the current going through two of its terminals through the voltage applied at the third terminal. But there are many applications for a transistor in its many different configurations, which is why it is so important in modern electronic technology.
Which devices have characteristics very close to that of an ideal current source?
Most sources attempt to provide a specific voltage by design. An ideal current source does not do this, and thus there are not very many good examples. A current transformer, like what is used for relaying and metering in the power system, is an ideal current source - it provides a direct reflection of the amount of current flowing in the primary side to th secondary side, regardless of voltage in the secondary (up to saturation of the transformer). A transistor amplifier may be set up as a current source as well. As in the above example, if the output resistance becomes too large, saturation of the transistor will occur causing it's characteristic output to be nonlinear. A battery is an ideal voltage source in series with a variable resistance (the internal resistance of the battery). A charged capacitor can be thought of the same, without the internal resistance (since this is extremely small compared to the capacitance, it can be ignored in many cases). A generator could be considered either a constant current source or voltage source, depending on how it is run. In some instances, a constant current will cause output voltage to increase or decrease. This variance can be controlled (to an extent) with external devices (capacitor and inductor banks, switching in and out specific lines, etc.). A generator can also be set up to provide a specific output voltage.
What ways of checking the validity of information gathered from ict sources and non sources?
Check more than one source. If they differ then check more sources until you get the straight facts.
Sources of beauty?
heart :)
Why two diode join cant act as transistor?
No, it is not possible because in transistor the depletion layers formed in Emitter-Base Junction & Collector-Base Junction are penetrable by both current carriers but in this case of two diodes; the formed depletion region are not penetrable for current carriers (hole &electron). Also, a transistor works only because the base layer is very thin. You won't get that thin layer between emitter and collector just by connecting two diodes together. This thin base layer places the Emitter and Collector in very close proximity to each other. This allows majority carriers from the emitter to diffuse as minority carriers through the base into the depletion region of the base-collector junction, where the strong electric field collects them. In other words the emitter/base current flow draws some of the barrier charge away from the collector/base junction and allows collector/emitter current to flow across the base using minority carriers. So transistor action is not possible. But we can make transistor by connecting two diodes and two dependent current sources i.e. Ebers-Moll model of transistor. This is true only when you want to make the transistor act like a on/off switch, but you cannot make this setup of diodes to act like an amplifier. Whereas the transistor also acts as an amplifier too A transistor can act as: (1) on/off switch (2) amplifier. Diode is made up of two layers and one junction. Transistor is made up of three layers and two junctions.
What is Analog multiplier using emitter coupled transistor pair?
The standard analog multiplier circuit (i.e. multiplying two analog signals to generate a product analog signal) sums the logs of the inputs then takes the antilog to form the output. The log and antilog functions are approximated using the base-emitter curve of transistors. The rest of the circuit is opamps, which have emitter coupled differential transistor amplifiers at their core. This however is limited to positive values only, and is called a one quadrant multiplier. Perhaps you are asking instead about a type of analog multiplier using two cross-connected emitter coupled differential transistor amplifiers and several constant current sources for bias. The main advantages of these is they can correctly handle negative numbers, and are thus called four quadrant multipliers, and they are almost trivial to integrate compared to the opamp version.
Radiation sources storage solutions?
Radiation sources are stored in containers which provide shielding to make handling and transport of the sources safe. The amount of shielding depends on the type of radiation-a gamma source requires more than a alpha or beta emitter.
What is characteristics of current source?
The characteristic of the current sources is that it cannot operate in an pen circuit.
What is transistor noise?
http://www.vias.org/transistor_basics/transistor_basics_04_05_03.html The minimum signal that can be applied to a transistor is limited by the internal noise generated by the transistor. Since the transistor does not require cathode heating (one of the major noise sources in the vacuum tubes), it is inherently capable of operating at lower noise levels than its vacuum tube brother. At present, the junction transistor is equal to the vacuum tube, insofar as its noise characteristics are concerned. The noise level of the point-contact types is between 15 and 30 db higher. see the website, there is a lot more. do more research for certainty.
The characteristic which distinguishes sounds from two sources of sound of same loudness and same frequency is called what?
The sound color or the timbre.
Which effect of nuclear radiation or weapons can you protect yourself from by wearing your protective clothing and mask?
Mostly inhalation/ingestion of alpha emitter dust particles. These offer little protection from other types of radiation sources.
What maternal characteristic is associated with having a down syndrome baby?
The only maternal characteristic to show a strong enough association to imply any causation is advanced maternal age, some sources reporting >35 years and some up to >45 years.
Why is Moore's law line a straight graph?
Moore's Law states essentially the exponential nature of the curve existing between transistor count in a single chip and passed time in years. Although in most websites and sources, the curve shown is straight with transistor # being in the Y axis, it must be observed, Moore stated that the curve is exponential. Thus the graphs, if linear are logarithmic curves, as a log graph for an exponential curve is linear in nature. So instead of transistor nos (x) , we use ln(x)
What were some of the problems in early Louisiana?
Early Louisanna, especially New Orleans, had a large number of law breakers from various sources. Corrption was a major characteristic.
Why is the characteristic of climate regularity important For humans?
Climate regularity is extremely important for humans. This is because humans do not have fur or bodily sources to help keep extreme temperature in or out.
What is the best way to describe the function of a typical transistor in an electronic circuit?
A transistor in a circuit can do many things. It can be used to amplify voltage signals, or current signals, create current and voltage sources, make buffers, and so on. Transistors also find a major use in logic circuits (ie, where signals can either be a '0' or a '1'), where they essentially act as a switch, and can be used to create inverters, AND gates, OR gates, and all sorts of useful components. By itself, a transistor is a three-terminal device that can control the current going through two of its terminals through the voltage applied at the third terminal. But there are many applications for a transistor in its many different configurations, which is why it is so important in modern electronic technology.
