BJT Transistor

Leakage Current in a Transistor and Breakdown Voltage

Leakage Current in a Transistor and Breakdown Voltage: Leakage Currents: In CB circuits shown in Fig. 10.77, if emitter current is made zero, the B-C junction still remains reverse biased and therefore, a reverse-bias leakage current exists in this junction, and this current corresponds to the reverse-bias saturation current in a diode. The direction of …

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Transistor approximation (Ideal, Second and Higher)

Transistor approximation

Transistor approximation (Ideal, Second and Higher): An NPN transistor is shown in Fig. 10.71 (a). Voltage appearing across the emitter diode is denoted by VBE and that appearing across the collector-emitter terminals is denoted by VCE. Ideal Approximation: An ideal approximation of a transis¬≠tor is shown in Fig. 10.71 (b). Emitter diode is visualized as …

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Transistor Lead Identification and Testing

Transistor Lead Identification and Testing: Transistor Lead Identification and Testing – After the transistor has been manufactured, as already discussed, leads of, typically, gold, aluminium, or nickel are then attached and the entire structure is encapsulated in a container such as that given in Fig. 10.65. Those with the studs and heat sinks are high …

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Transistor Load Line Analysis (DC and AC Load Line and Q Point)

Transistor as an Amplifier

Transistor Load Line Analysis (DC and AC Load Line and Q Point): The concept of Transistor load line analysis is very important in understanding the working of a transistor. It is defined as the locus of operating point on the output characteristic of the transistor. It is the line on which the operating point moves …

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Transistor as an Amplifier – Circuit Diagram and Its Workings

Transistor as an Amplifier

Transistor as an Amplifier – Circuit Diagram and Its Workings: The main utility of a transistor lies in its ability of amplifying weak signals. The weak signal is applied at the input terminals and the amplified output is obtained across the output terminals. A transistor alone cannot perform the function of amplification and some passive …

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