# Determining the component values for Dc

Draw the circuit diagram for DC and determine the component value. The transistor must be biased with :

This is my attempt to solve this

The picture bellow is the way I drew the DC circuit diagram

I would really appreciate if I could get some feedback regarding and some help on how to find R2

• "The transistor", would that be Q1 or Q2? – winny Jan 30 at 13:18
• @winny , in this case it would be both because R2 is connected to both of them – be1995 Jan 30 at 13:22
• Please name the components exactly as shown in the original question, and it's not clear what those parameters are given for which transistor. For example, probably $U{CE-A}$ indicates the voltage across C and E terminals of the transistor A (QA or something). Also, it seems that you have created the schematics with Circuit Lab. You don't have to put a screenshot, instead you can directly put the schematics inside the question. It allows you to modify the circuit. – Rohat Kılıç Jan 30 at 13:28
• @Rohat Kılıç , Uce is across C and E terminals for both transistors. I tried but I need a paid membership to be able to do that – be1995 Jan 30 at 13:30
• Please do not refer to two transistors as "the transistor". Please use component designators and refer to them. – winny Jan 30 at 13:41

## 1 Answer

Some parts of your question are a bit fuzzy. Improve that next time.

• thank you. How come Re is equal to 10kohm ?. Shouldn't Re= 7.3v/4mA ? – be1995 Jan 30 at 16:23
• that's a fuzzy part in 1st pix – Tony Stewart Sunnyskyguy EE75 Jan 30 at 17:05
• what do you mean by fuzzy part ? I can upload a better quality picture of the circuit.. Shouldn't Re= 7.3v/4mA ? – be1995 Jan 30 at 17:17
• There are 2 caps and Re given as 10k, it doesn't make sense to have more current =4mA in Q1 yet Re was given if I read it OK ...fuzzy – Tony Stewart Sunnyskyguy EE75 Jan 30 at 17:45
• I see it is RL not Re so yes Re=1.8k=7.3V/4mA – Tony Stewart Sunnyskyguy EE75 Jan 30 at 17:54