SEMICONDUCTOR DEVICE PHYSICS AND DESIGN

6.7. PROBLEMS 297 B-C JUNCTION Figure 6.26: Figure for problem 6.33. methods to arrive at the answer. For the impulse function, ...

298 CHAPTER 6. BIPOLAR JUNCTION TRANSISTORS Base Emitter x z XE = 2 μm XB = 6 μm WB = 100 nm LBE = 0.5 μm LBE Figure 6.27: Figur ...

6.7. PROBLEMS 299 Figure 6.28: Figure for problem 6.36. in the quantum well region compared to 1 ns in the rest of the base. The ...

300 CHAPTER 6. BIPOLAR JUNCTION TRANSISTORS ND W A ND/2 W B 0 2W 0 2W Figure 6.30: Figure for problem 6.38. p ++ i n n ++ 0.4 μm ...

6.8. DESIGN PROBLEMS 301 6.8 DESIGN PROBLEMS ............................... Problem 6.1Consider anpnSi-BJT at 300 K with the fo ...

302 CHAPTER 6. BIPOLAR JUNCTION TRANSISTORS Problem 6.3Consider anpnSi-BJT at 300 K with the following parameters: Nde =10^18 cm ...

6.9. FURTHER READING 303 6.9 FURTHERREADING ............................... General D. A. Neaman,SemiconductorPhysicsandDevices ...

Chapter 7 TEMPORAL RESPONSE OF DIODES AND BIPOLAR TRANSISTORS 7.1 INTRODUCTION ................................. In chapters 4-6 ...

7.2. MODULATION AND SWITCHING OF AP-NDIODE: AC RESPONSE 305 clock clock clock clock Ref Ref,clk Ref Rdata RefRef,clk Ref Rclk Rc ...

306 CHAPTER 7. TEMPORAL RESPONSE OF DIODES AND BIPOLAR TRANSISTORS are usually not very appealing, especially for high-speed app ...

7.2. MODULATION AND SWITCHING OF AP-NDIODE: AC RESPONSE 307 δp(x) T = 0 Increasing time x (a) How fast can minority charge be re ...

308 CHAPTER 7. TEMPORAL RESPONSE OF DIODES AND BIPOLAR TRANSISTORS The small signal junction capacitance is then Cj = ∣ ∣∣ ∣ dQ ...

7.2. MODULATION AND SWITCHING OF AP-NDIODE: AC RESPONSE 309 appear that the diffusion capacitance in figure 7.3b is given by equ ...

310 CHAPTER 7. TEMPORAL RESPONSE OF DIODES AND BIPOLAR TRANSISTORS Cp (a) (b) Input ac signal vs Vdc I is Cj Cdiff rs Rs Diode e ...

7.2. MODULATION AND SWITCHING OF AP-NDIODE: AC RESPONSE 311 Δ ̃p(0)can be calculated by noting that the total injected charge at ...

312 CHAPTER 7. TEMPORAL RESPONSE OF DIODES AND BIPOLAR TRANSISTORS andGsandCdif fare given by (see equation 7.2.14) Gs = eI kBT ...

7.2. MODULATION AND SWITCHING OF AP-NDIODE: AC RESPONSE 313 In the forward-biased state, minority charge is injected across the ...

314 CHAPTER 7. TEMPORAL RESPONSE OF DIODES AND BIPOLAR TRANSISTORS + R i(t) v(t) VR VF 0 t 1 Time + (a) (b) i(t) VF R t ...

7.2. MODULATION AND SWITCHING OF AP-NDIODE: AC RESPONSE 315 whereV 1 is the voltage across the diode and is related to the minor ...

316 CHAPTER 7. TEMPORAL RESPONSE OF DIODES AND BIPOLAR TRANSISTORS + R i(t) v(t) VR VF 0 t 2 Time t + (a) (b) i(t) t (^2 ...