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What else can I help you with?
Switching speed is high for mosfet or bjt?
generally bjt is faster than fets...because of many intrinsic junction capacitances between ...source and drain and bulk and gate,,,.. but now a days due to advancement in scaling fet is reduced in size sooo much that it became faster than bjt... mosfet is faster because of scaling. small channel length. even though it is slower but distance to be travelled is less
Can bjt amplify dc?
A bipolar junction transistor (BJT) can amplify DC signals, but it requires proper biasing to operate in the active region. By applying a DC input signal to the base, the BJT can control a larger DC current flowing from the collector to the emitter, effectively amplifying the input. However, the amplification is limited to small variations around the bias point, and the BJT cannot amplify a constant DC level without an input signal. Therefore, while BJTs can amplify DC, they are primarily used for AC signal amplification.
Why to short circuit capacitor in small signal analysis of BJT?
if the input signal passes through the biasing resistors, the biasing conditions get altered . To prevent this, the input signal should be directly sent to the amplifier (BJT) .Since a capacitor acts as a short circuit for ac signals,capacitors are placed both in the input side and the output side.
What are the steps involved in finding the signal gain for a common-emitter BJT amplifier?
The signal gain of a CE BJT amplifier is hFe or collector resistance divided by emitter resistance, whichever is less.
What is the difference between re model and hybrid model of BJT transistor?
The re model of a BJT (Bipolar Junction Transistor) focuses on the small-signal behavior of the transistor, where the transistor is represented using a small-signal parameter (re) that accounts for the dynamic resistance at the emitter junction. In contrast, the hybrid model combines both the small-signal parameters (like re) and the large-signal behavior, incorporating the transistor's input and output characteristics through a more complex representation that includes resistors, current sources, and controlled sources. Essentially, the re model simplifies analysis for small-signal applications, while the hybrid model provides a more comprehensive approach for varying signal conditions.
What can transistors be?
either field effect (JFET, MOSFET) or junction (BJT) or point contact (usually considered obsolete)either small signal or high powereither electron majority carrier (N-channel FET, NPN BJT) or hole majority carrier (P-channel FET, PNP BJT)either linear (used in amplifier and oscillator circuits) or switching (used in digital logic circuits)etc.
Is BJT used for high speed power application?
Yes
Transistors can be either what or what?
either field effect (JFET, MOSFET) or junction (BJT) or point contact (usually considered obsolete)either small signal or high powereither electron majority carrier (N-channel FET, NPN BJT) or hole majority carrier (P-channel FET, PNP BJT)either linear (used in amplifier and oscillator circuits) or switching (used in digital logic circuits)etc.
Is SCR better or Power BJT?
neither is better, it depends on purpose
How BJT works as a amplifier?
aplied weak input signal is amplied at output side due to very high resistence
What is re model of a bjt?
The re model of a Bipolar Junction Transistor (BJT) is a small-signal model used to analyze the transistor's behavior in the active region, particularly for small AC signals. In this model, the transistor is represented as a voltage-controlled current source (VCCS), where the output current is proportional to the input voltage (V_be) and is characterized by the transconductance (g_m). The model typically includes the emitter resistance (r_e), which accounts for the transistor's internal resistance to the emitter current. This simplified representation helps in understanding the BJT's amplification properties and is commonly used in circuit design and analysis.
Where can one get information regarding BJT?
If you have questions about Bipolar Junction Transistors (BJT), there are a small handful of websites. Indiabix, All About Circuits, and Research Gate are some places you can find information.
