0
The signal or output of a circuit is often affected by changes in the supply voltage and/or ambient temperature. A biasing circuit is designed to consistently output a selected voltage (or current). Depending on the circuit topology, a change in supply voltage or temperature can cause the intended value to drift. In an increase in temperature can, for example, increase resistances in a circuit. Such effects are usually undesireable and thus a supply/temperature independent bias would be needed. Electronic component manufactures will frequently provide tolerances for outputs relative to changes in supply voltage and temperature.
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
What is biasing?
if applying to people, something or some one who has been influenced in a particular way, could be an unfair way. If applying to objects, something that might cause the object to lean in a particular direction.
Why voltage divider biasing circuit is the widely used biasing?
In a voltage -divider circuit method for biasing a transistor , we have two resistors R1 and R2 a DC supply voltage VCC and other components like collector resistor , emitter resistor are also present.here biasing is done by the help of voltage drop across the resistorsto understand the reason behind the extensive usage of voltage - divider method we need to know about the term stability.Stability factor of a transistor is defined as the ratio of amount of change in collector current to the amount of change in the same collector current with the base open(leakage current due to minority charge carriers)lesser the stability factor ------ that type of biasing is more desiredthe stability factor for voltage divider method is nearly equal to one.
What is the forward biasing of a junction?
Forward biasing can be satisfied when a positive polarity of a battery connect with P side and the negative connect with N side In the P-N junction, that is caused : The free electrons in the N side will pushed by negative charge, and holes move far of positive charge, after that we will have a barrier (small area of barrier between P and N) this biasing called Forward biasing, because of small resistance of barrier, the current will flow, we can use it as a switch. the Reverse biasing is the opesit of all these specifications.
Why DC supply is used in control circuit?
dc supply is used for control circuit because dc current is an independent source .
What is self biasing a transistor?
if a transistor resistor is connected to the emmiter .
Why CE transistor is more temperature senstive than CB transistor?
In CE transistor volteage divider biasing is used, which is independent of temperature and other parameters.
In which transistor bias method is the input signal rectified?
in which of the following transistor bias methods is the input singel rectified? A. source biasing b.voltage divider biasing c.power supply biasing d.avc biasing
Which biasing is known to as universal biasing?
voltage divider biasing
How biasing of FET differs from biasing of BJT?
in BJT forwardbiasing & reverse biasing are carried out but in FET voltage divider biasing &self biasing are carried out.
What is thermal runaway in BJT?
Thermal runaway is where the biasing and operating point is such that the temperature causes the gain to increase, which causes the temperature to increase, which causes the gain to increase, in a vicious circle, leading to destruction of the BJT. Proper biasing and gain management can prevent this from occurring.
What are the types of biasing in pn junction diode?
There are 2 type of biasing in PN junction didoe Forward biasing Reverse biasing
Why are you going for different type of biasing the transistor?
In each of the biasing circuit ,there are variations in Q-point (undesirable)with respect to the temperature. The voltage divider bias serves a better way to minimize the change in Q-point.
What is biasing?
if applying to people, something or some one who has been influenced in a particular way, could be an unfair way. If applying to objects, something that might cause the object to lean in a particular direction.
What is thermal runaway in a BJT?
Thermal runaway is where the biasing and operating point is such that the temperature causes the gain to increase, which causes the temperature to increase, which causes the gain to increase, in a vicious circle, leading to destruction of the BJT. Proper biasing and gain management can prevent this from occurring.
What effect of depletion layer by biasing?
on forward biasing width of the depletion layer decreases whereas on reverse biasing the width of depletion layer increases.
Which biasing technique is best for amplifier?
The voltage or Potential divider bias or the self bias circuit is the best biasing technique because,it has very low stability factor(change in collector current with respect to Ico or Vbe or current gain beta). only in this technique the increase in temperature wont affect the collector current.
What the threshold voltage depends on?
It basically depends on the biasing of a transistor. In case of a MOSFET, it depends on the substrate biasing.
