How do you choose the operating point of a transistor?

Proper Minimum VBE at any instant. The minimum base to emitter voltage VBE should be greater than the cut-in voltage for the junction to be forward biased. The minimum voltage needed for a silicon transistor to conduct is 0.7v and for a germanium transistor to conduct is 0.5v.

What is the significance of operating point in transistor?

The operating point (quiescent point)(Q pointt) is the constant dc voltage or current given to the collector terminal for its operation. When transistor acts as a amplifier,this point has to be maintained constant,thats where biasing helps us,by providing this constant dc collector voltage.

What is operating point in transistor biasing?

Definition: The point which is obtained from the values of the IC (collector current) or VCE (collector-emitter voltage) when no signal is given to the input is known as the operating point or Q-point in a transistor.

What is Q point and how it is selected?

The position of Q-point is selected according to the application of transistor.  If transistor is to be used as switch, Q-point is in cut-off region for open. switch and in saturation region for closed switch.  If transistor is to be operated as amplifier, Q-point is placed exactly in the. middle of the DC load line.

What elements determine the transistor to operate in the active region?

The transistor operates in active region when the emitter junction is forward biased and collector junction is reverse biased. In the active state, collector current is β times the base current, i.e.

Which parameters define the operating point?

In an electronic amplifier, an operating point is a combination of current and voltage at “no signal” conditions; application of a signal to the stage – changes voltage and current in the stage.

What is operating point electronic circuits?

The operating point of a device, also known as bias point, quiescent point, or Q-point, is the DC voltage or current at a specified terminal of an active device (a transistor or vacuum tube) with no input signal applied. A bias circuit is a portion of the device’s circuit which supplies this steady current or voltage.

What are the conditions to operate Q point in different regions?

The position of the Q-point depends on the applications of the transistor. If the transistor is used as a switch then for open switch the Q-point is in the cutoff region, and for the close switch, the Q-point is in the saturation region.