Can base voltage be higher than collector voltage?

Can base voltage be higher than collector voltage?

If the base voltage is higher than the collector voltage, and the base voltage is higher than the emitter voltage, the transistor is in the “saturation mode” of operation. Current will be flowing into the base (or out of base for PNP). This is something you can enter into a search engine for better understanding.

How much voltage Approximately should be between the emitter and base?

All Answers (8) As the first figure shows, for any decently large base current the voltage drop between the base and the emitter will be around 0.6 to 0.7 V. Mathematically, this means that the BE voltage is the log of the current.

What is the voltage drop across the collector and emitter of transistor?

When using a transistor as a switch most of the time it’s OK to ignore the 0.2V drop across the collector emitter junction and the 0.7V drop across the base emitter junction in your calculations. Your results will be close enough (especially with the safety margin). The transistor is a current amplifier.

What is maximum collector emitter voltage?

The Collector−Emitter Voltage, VCEO, spec states the maximum voltage that can be applied from the collector to emitter is 50 V. There are two maximum ratings for the input voltage, forward and reverse.

What is the collector voltage?

[kə′lek·tər ‚vȯl·tij] (electronics) The direct-current voltage, obtained from a power supply, that is applied between the base and collector of a transistor.

What happens if the voltage on the base of a transistor increases?

If one increases the base current further, the collector current clamps at this point since the transistor is saturated and the most of the power supply voltage will be dropped on the collector load resistance.

What happens to the collector current if the emitter current increases while no base voltage is applied?

Explanation: When no voltage is provided at the base then no current passes from emitter to collector, so even if very high potential difference is applied at the emitter collector junction, no current flows through it.

How is collector voltage calculated?

Determine the voltage drop between the collector and emitter junctions (Vce) of the transistor using the formula Vce = Vcc – IcRc, where “Vce” is the collector emitter voltage; “Vcc” is the supply voltage; and “IcRc” is the voltage drop across the base resistor (Rb). Determine the Vcc in a feedback-biased circuit.

Which is a function of the collector emitter voltage?

Collector–Emitter saturation voltage (VCE (SAT)): This parameter specifies the collector–emitter forward voltage drop and is a function of collector current, gate voltage, and temperature. Reducing the resistance of the MOSFET channel and JFET region, and increasing the gain of the pnp bipolar transistor can minimize the on-state voltage drop.

What happens when the collector voltage is changed?

Base-width modulation causes both the collector current and base current of the transistor to change when the collector voltage changes. This small-signal effect means that a transistor current source does not have infinite output impedance.

Why does a pass transistor have a low collector voltage?

Overvoltage protection circuit. The pass transistor is a PNP switching type, optimized for low collector–emitter voltage drop and high current. Small package size is achieved even though the transistor is passing high current, its voltage drop is so low that the overall power dissipated in the transistor is low.

What is the voltage across the base of a transistor?

The differences. In the case of the emitter follower circuit the voltage across the load can RISE until this condition (Vbe = 0.6V) is satisfied. The transistor is not fully turned ON and the voltage across the transistor (Vce) will be 12 – 4.4 = 7.6V.