Analog Transistor circuit compared to diode circuit

0
Favorite
2
copy
Copy
142
Views
Analog Transistor circuit compared to diode circuit

Circuit Description

Graph image for Analog Transistor circuit compared to diode circuit

Circuit Graph

Analog Transistor circuit compared to diode circuit Transistor switch circuit that consists of NPN BJT (Bipolar Junction Transistor), DC power supply, fuse, switch and resistors. On the right side is another circuit. This one is the Diode circuit that consist of diode, DC power supply, switch and resistor. I arranged the two circuits side-side to highlight the behavior of the transistor Q1 base-emitter voltage and current. Also, the behavior of diode D1 P-N junction voltage and current. Investigate the similarity of those two during the simulation exercise. Transistor circuit parameters: VDC = 5VDC R1= 330ohm Rload=330ohm F1= Fuse, 100mA Q1=common NPN transistor S1=ON/OFF switch Diode circuit parameter: VDC1=5VDC Rload1=330ohm D1=common diode S2=ON/OFF switch Answer the following on a separate Word document and email the answers to the instructor. Deadline of submission will be announced. Exercise 1: Run the simulation What are the voltage and current value when S1 is OFF Vbase=? Ibase=? Vload=? I_load=? Exercise 2: Select S1 until its contact turns ON (wire shorted) What are the voltage and current value when S1 is ON Vbase=? Ibase=? Vload=? I_load=? Did the I_load increased or decreased when S1 in ON? Exercise 3: Now go to the Diode circuit at the right side. What is the voltage and current when S2 is OFF Vload1=? I_load1=? Exercise 4: Select S2 until its contact turns ON (wire shorted) What are the voltage and current value when S2 is ON Vload1=? I_load1=? Did the I_load increased or decreased when S2 in ON? Stop the simulation. Notice the similarities between the Q1 base-emitter voltage and current compared to D1 voltage and current. Both of them are almost the same when they are switched ON (when forward bias voltage are applied to its P-N junction). Notice that Q1 base-emitter junction is also P-N junction. In addition, I_load current increased due to collector-emitter shorting to ground. This is how you turn-ON a transistor. Common base-emitter voltage is ~0.7Volt and base current is ~12mA. Reverse Bias Condition: Reverse D1 where its P-junction is grounded and N-junction is connected to Rload. Exercise 5: Run the simulation What is the voltage and current when S1 is OFF Vload1=? I_load1=? Exercise 6: Select S2 until its contact turns ON (wire shorted) What are the voltage and current value when S2 is ON Vload1=? I_load1=? Did the I_load increased or decreased when S2 in ON? Did the Vload increased or decreased when S2 in ON? What you noticed when the diode is reversed bias?

There are currently no comments

Profile image for ChrisCoronel

Analog MOSFET as switch

ChrisCoronel
Profile image for ChrisCoronel

Analog Transistor as a power amplifier

ChrisCoronel
NAWS China Lake
3 Members

Creator

ChrisCoronel

76 Circuits

Date Created

2 years, 7 months ago

Last Modified

2 years, 3 months ago

Tags

  • diode
  • transistor
  • diodes
  • diode circuits
  • transistor switch
  • transistor circuit
  • Transistor diode compared switch