Use LTSPICE Now, let\'s start the lab exercise: +Vcc (DC supply) Rc = 100 2N3904

Question

Use LTSPICE Now, let's start the lab exercise: +Vcc (DC supply) Rc = 100 2N3904 (DC supply) RB = 33 k2 1. Connect the 2N3904 transistor up into the circuit as shown above; for your base and collector resistors, measure and record the exact values. Start with VBB and Vcc voltages set to zero. (Make sure of this before connecting them to the circuit.) 2. Measure the voltage across RB while increasing the VBB supply voltage. Continue to increase VBB until the voltage across RB reaches 1.65 volts. This will set up a base current of 50 A, which you can confirm by Ohm's law.

Explanation / Answer

Vcc - IcRc = Vce

Vbb - ib*rb = Vbe

ib*rb = 1.65

Vbe = .7

rb = 33k

ib = 50 microampere

ic= dc current gain * ib

= 100*50

= 5 mA

Vrc = 0.5 V

Related Questions

Navigate

• Browse (All)
• Browse U
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.