Table of Contents
- 1 Is a voltage regulator a BJT?
- 2 Which circuit is used for voltage regulator?
- 3 Why is zener diode used as voltage regulator?
- 4 Is a voltage regulator a transistor?
- 5 Which of the voltage regulator gives excellent regulation?
- 6 What is the function of BJT in a circuit board?
- 7 Which diode is used in the BJT configuration?
- 8 How does a transistor shunt voltage regulator work?
Is a voltage regulator a BJT?
A linear regulator uses an active pass device called bipolar junction transistor (BJT) or MOSFET) run by a high-gain differential amplifier. It basically differentiates the output voltage with a specific voltage then adjusts the pass device to keep the output voltage within the standard range.
Which circuit is used for voltage regulator?
Simple DC power supplies can be made with rectifiers. But they suffer from changes in the input or at load. This initiated the development of the linear regulator (series/shunt) circuits*. Linear regulators maintain a constant voltage by varying their resistance to counterbalance input voltage change.
What is the necessity of voltage regulator?
voltage regulator, any electrical or electronic device that maintains the voltage of a power source within acceptable limits. The voltage regulator is needed to keep voltages within the prescribed range that can be tolerated by the electrical equipment using that voltage.
Why is zener diode used as voltage regulator?
The Zener diode is often in use as a voltage regulator, primarily because the voltage drop across the diode is constant. Furthermore, the supply voltage must exceed the Zener voltage for the circuit to operate. Thereby, any electronic component connected in parallel with these diodes will have the same applied voltage.
Is a voltage regulator a transistor?
voltage regulators are different from transistors in design although a Transistor can be used to regulate voltage when comnbined with resistors and capacitors. Regulators give a constant output voltage in a circuit and nothing more while transistors act as switches. Amplifiers and phase shift signals input.
Why BJT is minority carrier device?
By design, most of the BJT collector current is due to the flow of charge carriers (electrons or holes) injected from a heavily doped emitter into the base where they are minority carriers that diffuse toward the collector, and so BJTs are classified as minority-carrier devices.
Which of the voltage regulator gives excellent regulation?
Zener Controlled Transistor Shunt Voltage Regulator
| Advantages of Linear Voltage Regulator | Disadvantages of Linear Voltage Regulator |
|---|---|
| Design is very simple | Low efficiency |
| Less output ripple | Space requirement is large |
| Response time is fast | Voltage cannot be increased |
| Less noise | A heat sink is sometimes required |
What is the function of BJT in a circuit board?
Combining with the resistor (R), It also forms an RC filter which is used to reduce the ripple voltages. The BJT is used in Emitter-Follower configuration. ie, the emitter will follow the base. The zener diode is used to regulate the base voltage which leads to regulated emitter voltage.
What is transistor based voltage regulator?
Transistor Based Voltage Regulator: Circuit # 1. The BJT is used in Emitter-Follower configuration. ie, the emitter will follow the base. The zener diode is used to regulate the base voltage which leads to regulated emitter voltage. Note that in a transistor the current required by the base is only 1/hFE times the emitter to collector current.
Which diode is used in the BJT configuration?
The BJT is used in Emitter-Follower configuration. ie, the emitter will follow the base. The zener diode is used to regulate the base voltage which leads to regulated emitter voltage.
How does a transistor shunt voltage regulator work?
Transistor Shunt Voltage Regulator A transistor shunt regulator circuit is formed by connecting a resistor in series with the input and a transistor whose base and collector are connected by a Zener diode that regulates, both in parallel with the load. The figure below shows the circuit diagram of a transistor shunt regulator.