What are the limitations of transistors?

(1) It is sensitive to temperature, (2) It produced very low energy. (3) The power transistor cannot be operating satisfactorily above the switching frequency of 15 kHz.

What are the specifications for switching transistors?

An ideal transistor switch would have infinite circuit resistance between the Collector and Emitter when turned “fully-OFF” resulting in zero current flowing through it and zero resistance between the Collector and Emitter when turned “fully-ON”, resulting in maximum current flow.

Why use a transistor and not a switch?

The benefit of such a switch is that either on or off. There is no intermediate state and the switch can be locked out for safety. On the other hand, transistors offer many advantages over a mechanical switch. Since the transistor does not break the circuit, you have no arc and therefore no damage to the device.

What is the disadvantage of integrated circuit *?

What is the disadvantage of integrated circuit? Explanation: The disadvantage of IC is that, a lack of flexibility an IC. It is generally not possible to modify the parameters within which an integrated circuit will operate.

What are the advantages and disadvantages of integrated circuits?

Advantages and disadvantages of integrated circuits

• It is more reliable.
• The entire physical size of IC is the extremely small size.
• Low power consumption because of their small size.
• It can easily replace but it can hardly remain in case of failure.
• It has suitable for small signal operation.

When a transistor switch is on the collector current is limited by?

If the voltage difference between the collector and emitter were zero (or near zero), the collector current would be limited only by the load resistance (light bulb) and the supply voltage. This is called saturation because current is flowing from collector to emitter freely.

What are the important transistor ratings?

The rating for maximum collector-emitter voltage VCE can be thought of as the maximum voltage it can withstand while in cutoff mode (no base current). This rating is of particular importance when using a bipolar transistor as a switch. A typical value for a small signal transistor is 60 to 80 V.

Why are transistors better than switches?

What are the advantages and disadvantages of microprocessor?

Advantages and disadvantages of microprocessor

• The microprocessor is that these are general purpose electronics processing devices which can be programmed to execute a number of tasks.
• Compact size.
• High speed.
• Low power consumption.
• It is portable.
• It is very reliable.
• Less heat generation.

Why do we use multiple switching transistors in bipolar transistors?

Sometimes the DC current gain of the bipolar transistor is too low to directly switch the load current or voltage, so multiple switching transistors are used. Here, one small input transistor is used to switch “ON” or “OFF” a much larger current handling output transistor.

What are the characteristics of saturation in transistors?

Saturation Characteristics. With a zero signal applied to the Base of the transistor it turns “OFF” acting like an open switch and zero collector current flows. With a positive signal applied to the Base of the transistor it turns “ON” acting like a closed switch and maximum circuit current flows through the device.

What is a transistor switch?

Transistor switches can be used to switch a low voltage DC device (e.g. LED’s) ON or OFF by using a transistor in its saturated or cut-off state When used as an AC signal amplifier, the transistors Base biasing voltage is applied in such a way that it always operates within its “active” region, that is the linear part of the output

What is NPN transistor switching circuit?

Basic NPN Transistor Switching Circuit. The circuit resembles that of the Common Emitter circuit we looked at in the previous tutorials. The difference this time is that to operate the transistor as a switch the transistor needs to be turned either fully “OFF” (cut-off) or fully “ON” (saturated).