Wiki

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
university:courses:electronics:electronics-lab-6 [05 Mar 2019 12:29]
Antoniu Miclaus [Procedure]
university:courses:electronics:electronics-lab-6 [25 Jun 2020 22:07] (current)
Line 1: Line 1:
-====== Activity ​6. BJT Current Mirror ======+====== ActivityBJT Current Mirror ======
  
 ===== Objective: ===== ===== Objective: =====
Line 30: Line 30:
 ===== Hardware Setup: ===== ===== Hardware Setup: =====
  
-In the current mirror configuration,​ the op amp serves as a virtual ground at the mirror input (base) node to convert the voltage steps from AWG 2 ( W2 output ) into current steps through the 1KΩ resistor. The collector voltage is swept using a ramp from AWG 1(output W1) set to 3V peak to peak with the offset to 1.5V. V<​sub>​CE</​sub>​ of output device Q<​sub>​2</​sub>​ is measured differentially by scope inputs 1+, 1-. The mirror output current is measured by scope inputs 2+. 2- across 1KΩ resistor, R<​sub>​2</​sub>​.+In the current mirror configuration,​ the op amp serves as a virtual ground at the mirror input (base) node to convert the voltage steps from AWG 2 ( W2 output ) into current steps through the 1KΩ resistor. The collector voltage is swept using a ramp from AWG 1(output W1). Load the stairstep.csv file, set amplitude ​to 3V peak-to-peak with the offset to 1.5V.  
 +V<​sub>​CE</​sub>​ of output device Q<​sub>​2</​sub>​ is measured differentially by scope inputs 1+, 1-. The mirror output current is measured by scope inputs 2+. 2- across 1KΩ resistor, R<​sub>​2</​sub>​.
 If you don't want to use the op-amp configuration the following simplified configuration can be used as well. If you don't want to use the op-amp configuration the following simplified configuration can be used as well.
  
Line 183: Line 184:
 <WRAP round download>​ <WRAP round download>​
 **Resources:​** **Resources:​**
-  * Fritzing files: [[ https://​minhaskamal.github.io/​DownGit/#/​home?​url=https://​github.com/​analogdevicesinc/​education_tools/​tree/​master/​m2k/​fritzing/​bjt_current_mirror_bb | bjt_current_mirror_bb]] +  * Fritzing files: [[downgit>education_tools/​tree/​master/​m2k/​fritzing/​bjt_current_mirror_bb | bjt_current_mirror_bb]] 
-  * LTspice files: [[ https://​minhaskamal.github.io/​DownGit/#/​home?​url=https://​github.com/​analogdevicesinc/​education_tools/​tree/​master/​m2k/​ltspice/​bjt_current_mirror_ltspice | bjt_current_mirror_ltspice]]+  * LTspice files: [[downgit>education_tools/​tree/​master/​m2k/​ltspice/​bjt_current_mirror_ltspice | bjt_current_mirror_ltspice]]
 </​WRAP>​ </​WRAP>​
  
 **Return to Lab Activity [[university:​courses:​electronics:​labs|Table of Contents]]** **Return to Lab Activity [[university:​courses:​electronics:​labs|Table of Contents]]**
university/courses/electronics/electronics-lab-6.1551785356.txt.gz · Last modified: 05 Mar 2019 12:29 by Antoniu Miclaus