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Điện tử_ Chapter 13

Tài liệu tham khảo về môn Điện tử_ Chapter " Bipolar Junction Transistors" dành cho các bạn học viên, sinh viên đang theo học ngành điện- điện tử. | Chapter 13 Bipolar Junction Transistors Chapter 13 Bipolar Junction Transistors 1. Understand bipolar junction transistor operation in amplifier circuits. 2. Analyze simple amplifiers using the load-line technique and understand the causes of nonlinear distortion. 3. Use large-signal equivalent circuits to analyze BJT circuits. 4. Analyze bias circuits. 5. Use small-signal equivalent circuits to analyze BJT amplifiers. 6. Compute performance of several important amplifier configurations. 7. Select an amplifier configuration appropriate for a given application. Equations of Operation COMMON-EMITTER CHARACTERISTICS Common-emitter Input Characteristic Common-emitter Output Characteristics LOAD-LINE ANALYSIS OF A COMMON-EMITTER AMPLIFIER (Input Circuit) LOAD-LINE ANALYSIS OF A COMMON-EMITTER AMPLIFIER (Output Circuit) When iC becomes zero, we say that the transistor is cutoff. When vCE 0.2 V, we say that the transistor is in saturation. PNP BIPOLAR JUNCTION TRANSISTORS Except for reversal of current directions and voltage polarities, the pnp BJT is almost identical to the npn BJT. LARGE-SIGNAL DC CIRCUIT MODELS (Active-Region Model) LARGE-SIGNAL DC CIRCUIT MODELS (Saturation-Region Model) LARGE-SIGNAL DC CIRCUIT MODELS (Cutoff-Region Model) Analysis of the Fixed Base Bias Circuit Analysis of the Four-Resistor Bias Circuit ib(t) denotes the signal current flowing into the base, IBQ is the dc current that flows when the signal is absent, and iB(t) is the total base current. Similar notation is used for the other currents and voltages. Small-Signal Equivalent Circuit for the BJT COMMON-EMITTER AMPLIFIERS The common-emitter amplifier is inverting and has large voltage gain magnitude, large current gain, and large power gain. EMITTER FOLLOWERS Output Impedance Even though the voltage gain of the emitter follower is less than unity, the current gain and power gain can be . | Chapter 13 Bipolar Junction Transistors Chapter 13 Bipolar Junction Transistors 1. Understand bipolar junction transistor operation in amplifier circuits. 2. Analyze simple amplifiers using the load-line technique and understand the causes of nonlinear distortion. 3. Use large-signal equivalent circuits to analyze BJT circuits. 4. Analyze bias circuits. 5. Use small-signal equivalent circuits to analyze BJT amplifiers. 6. Compute performance of several important amplifier configurations. 7. Select an amplifier configuration appropriate for a given application. Equations of Operation COMMON-EMITTER CHARACTERISTICS Common-emitter Input Characteristic Common-emitter Output Characteristics LOAD-LINE ANALYSIS OF A COMMON-EMITTER AMPLIFIER (Input Circuit) LOAD-LINE ANALYSIS OF A COMMON-EMITTER AMPLIFIER (Output Circuit) When iC becomes zero, we say that the transistor is cutoff. When vCE 0.2 V, we say that the transistor is in saturation. PNP BIPOLAR JUNCTION TRANSISTORS Except for reversal