Survey
* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project
Download Chapter 12 - Electrical and Computer Engineering
Document related concepts
no text concepts found
Transcript
Chapter 12 Field-Effect Transistors 1. Understand MOSFET operation. 2. Analyze basic FET amplifiers using the load-line technique. 3. Analyze bias circuits. ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors 4. Use small-signal equivalent circuits to analyze FET amplifiers. 5. Compute the performance parameters of several FET amplifier configurations. 6. Select a FET amplifier configuration that is appropriate for a given application. 7. Understand the basic operation of CMOS ELECTRICA L logic Chapter 12 gates. ENGINEERING Field-Effect Transistors Principles and Applications NMOS AND PMOS TRANSISTORS ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors Operation in the Cutoff Region ELECTRICA L ENGINEERING Principles and Applications iD 0 for vGS Vto Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors Operation in the Triode Region iD K 2vGS vto v DS v W K L ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors KP 2 2 DS ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors Operation in the Saturation Region iD K vGS vto 2 iD Kv ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors 2 DS ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors MOSFET Summary ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors LOAD-LINE ANALYSIS OF A SIMPLE NMOS AMPLIFIER ELECTRICA L ENGINEERING Principles and Applications v DD RDiD t v DS t Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications To establish the load line, we first locate two points on it. Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors Amplifier Analysis Amplifier analysis has two steps: 1. Determine the Q point. 2. Use a small-signal equivalent circuit to determine impedances and gains. ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors The Fixed- Plus Self-Bias Circuit ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors VG VDD R2 R1 R2 VG vGS RS iD iD K vGS Vto 2 ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors SMALL-SIGNAL EQUIVALENT CIRCUITS iD t I DQ id t ELECTRICA L ENGINEERING Principles and Applications vGS t VGSQ v gs t Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors g m 2 KI DQ g m 2 KP W L I DQ ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors iD gm vGS Q point iD 1 rd v DS Q point ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors COMMON-SOURCE AMPLIFIERS ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors The Small-Signal Equivalent Circuit In small-signal midband analysis of FET amplifiers, the coupling capacitors, bypass capacitors, and dc voltage sources are replaced by short circuits. The FET is replaced with its small-signal equivalent circuit. Then, we write circuit equations and derive useful expressions for gains, input ELECTRICA impedance, and output impedance. L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors Voltage Gain 1 RL 1 rd 1 RD 1 RL vo Av g m RL vin ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors Input Resistance vin Rin RG R1 R2 iin ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors Output Resistance To find the output resistance of an amplifier, we disconnect the load, replace the signal source by its internal resistance, and then find the resistance looking into the output terminals. 1 Ro 1 RD 1 rd ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors SOURCE FOLLOWERS ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors The Small-Signal Equivalent Circuit ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors Voltage Gain 1 RL 1 rd 1 RS 1 RL vo g m RL Av vin 1 g m RL ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors Input Resistance vin Rin RG iin ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors Output Resistance ELECTRICA L ENGINEERING Principles and Applications 1 Ro g m 1 RS 1 rd Chapter 12 Field-Effect Transistors Source-Follower Characteristics The source follower has voltage gain slightly less than unity, high input impedance, and low output impedance. Current gain and power gain can be larger than unity. ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors CMOS Inverter ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors CMOS NAND Gate ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors CMOS NOR Gate ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors ELECTRICA L ENGINEERING Principles and Applications Chapter 12 Field-Effect Transistors
Related documents