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university:courses:electronics:electronics-lab-10 [23 Mar 2017 16:16] – [Materials:] Doug Merceruniversity:courses:electronics:electronics-lab-10 [23 Aug 2019 13:05] – Antoniu Miclaus
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-====== Activity 10. Shunt regulator ======+====== Activity: Shunt regulator ======
  
 ===== Objective: ===== ===== Objective: =====
Line 25: Line 25:
 ===== Hardware Setup: ===== ===== Hardware Setup: =====
  
-Waveform generator W1 should be configured for a 1 KHz triangle wave with 2 volt amplitude and 2V offset. The Single ended input of scope channel 2 (2+) is used to measure the regulated output voltage at the collector of Q<sub>3</sub>.+{{:university:courses:electronics:bandgap_sh_reg-bb.png|}} 
 + 
 +<WRAP centeralign> Figure 2 Band-gap shunt regulator Breadboard Circuit </WRAP> 
 + 
 +Waveform generator W1 should be configured for a 1 KHz triangle wave with 4 volt amplitude peak-to-peak and 2V offset. The Single ended input of scope channel 2 (2+) is used to measure the regulated output voltage at the collector of Q<sub>3</sub>.
  
 ===== Procedure: ===== ===== Procedure: =====
  
 The regulated output voltage should be observed as the variable resistor R<sub>3</sub> is adjusted. The regulated output voltage should be observed as the variable resistor R<sub>3</sub> is adjusted.
 +
 +<WRAP centeralign>{{:university:courses:electronics:bandgap_sh_reg-wav.png?500|}}</WRAP>
 +
 +<WRAP centeralign> Figure 3 output voltage vs. input voltage  </WRAP>
  
 {{ :university:courses:electronics:a10_f2.png?500 |}} {{ :university:courses:electronics:a10_f2.png?500 |}}
  
-<WRAP centeralign> Figure 2 output voltage vs. input current </WRAP>+<WRAP centeralign> Figure 4 output voltage vs. input current </WRAP>
  
 =====Questions: ===== =====Questions: =====
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 All the emitters can be tired to ground ( pins 3,7,10,13 ). Devices Q<sub>1</sub>, Q<sub>2</sub> and Q<sub>3</sub> can be connected in parallel and serve as Q<sub>2</sub> in figure 1. Q<sub>4</sub> and Q<sub>5</sub> can be used for Q<sub>1</sub> and Q<sub>3</sub> in figure 2. The 3 to 1 emitter area ratio will result in an output voltage very nearly 1.2 volts if R<sub>1</sub> and R<sub>3</sub> are both equal to 2KΩ. All the emitters can be tired to ground ( pins 3,7,10,13 ). Devices Q<sub>1</sub>, Q<sub>2</sub> and Q<sub>3</sub> can be connected in parallel and serve as Q<sub>2</sub> in figure 1. Q<sub>4</sub> and Q<sub>5</sub> can be used for Q<sub>1</sub> and Q<sub>3</sub> in figure 2. The 3 to 1 emitter area ratio will result in an output voltage very nearly 1.2 volts if R<sub>1</sub> and R<sub>3</sub> are both equal to 2KΩ.
 +
 +<WRAP round download>
 +**Resources:**
 +  * Fritzing files: [[ https://minhaskamal.github.io/DownGit/#/home?url=https://github.com/analogdevicesinc/education_tools/tree/master/m2k/fritzing/shunt_volt_reg_bb | shunt_reg_bb]]
 +  * LTSpice files: [[ https://minhaskamal.github.io/DownGit/#/home?url=https://github.com/analogdevicesinc/education_tools/tree/master/m2k/ltspice/shunt_reg_ltspice | shunt_reg_ltspice]]
 +</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-10.txt · Last modified: 05 Nov 2021 15:29 by Doug Mercer

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