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ENGIN 365 Electronics I Introduction

ENGIN 365 Electronics I Introduction. Matthew Bell <Matthew.Bell@umb.edu>. What is Microelectronics?. SiO 2 : 3.9 ZrO x : ~20. What is covered in ENGIN 365?. Diodes Bipolar Junction Transistors Metal-Oxide-Semiconductor Field-effect Transistors Operational Amplifiers.

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ENGIN 365 Electronics I Introduction

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  1. ENGIN 365 Electronics IIntroduction Matthew Bell <Matthew.Bell@umb.edu>

  2. What is Microelectronics?

  3. SiO2: 3.9 ZrOx: ~20

  4. What is covered in ENGIN 365? • Diodes • Bipolar Junction Transistors • Metal-Oxide-Semiconductor Field-effect Transistors • Operational Amplifiers

  5. Circuit Design: What Professionals Do • Minimize use of expensive components • Maximize circuit robustness, making them • Insensitive to component selection • Insensitive to their operating environment • Recognize that semiconductor devices: • Are highly nonlinear in their behavior • Are sensitive to temperature • Vary in performance from device to device

  6. Circuit Design: How to • Preliminary design: “back of the envelope” exercise • Simulation: using theoretical models for real components (SPICE) • Designs are implemented and tested • Process generally iterative

  7. Sample Exercise: “back of the envelope design”

  8. Sample Exercise: “back of the envelope design” Wall Power 60 Hz 120 Vrms Convert to DC and Limit to 5V LED and Driver Circuit Multivibrator Circuit

  9. 5 V 17:1

  10. Diodes and Rectifiers

  11. Full-wave Rectifier

  12. Voltage Regulation: Zener Diode

  13. Zener 5 V

  14. Multivibrator Circuit

  15. Bipolar Junction Transistor (BJT) C B E

  16. C Saturation Active B E Active Saturation Cut-off

  17. BJT Example Rcoil = 160 Ω 2N3904 Datasheet Logic 5V 2N3904 Vcc = 12 V

  18. What Region are the BJTs in? Edge of Saturation

  19. LED Driver Circuit

  20. Metal-Oxide-Semiconductor Field-effect Transistor (MOSFET)

  21. Metal-Oxide-Semiconductor Field-effect Transistor (MOSFET) Linear Region: VGS > Vth and VDS < ( VGS – Vth ) Saturation Region: VGS > Vth and VDS ≥ ( VGS – Vth )

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