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university:courses:electronics:electronics-lab-9 [15 Feb 2019 16:49]
amiclaus add ltspice files
university:courses:electronics:electronics-lab-9 [12 Jul 2019 13:27]
andreeapop
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-====== Activity ​9.  ​Regulated Voltage Reference ======+====== Activity ​Regulated Voltage Reference ======
  
 ====== Version 1 ====== ====== Version 1 ======
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 ===== Objective: ===== ===== Objective: =====
  
-The zero gain amplifier (Q<​sub>​1</​sub>,​ R<​sub>​2</​sub>​) and stabilized current source (Q<​sub>​2</​sub>,​ R<​sub>​3</​sub>​) from activities ​and can be used in conjunction with a PNP current mirror stage (Q<​sub>​3</​sub>,​Q<​sub>​4</​sub>​) in negative feedback to build a circuit which provides a constant or regulated output voltage over a range of input voltages.+The zero gain amplifier (Q<​sub>​1</​sub>,​ R<​sub>​2</​sub>​) and stabilized current source (Q<​sub>​2</​sub>,​ R<​sub>​3</​sub>​) from activities ​10 and 11 can be used in conjunction with a PNP current mirror stage (Q<​sub>​3</​sub>,​Q<​sub>​4</​sub>​) in negative feedback to build a circuit which provides a constant or regulated output voltage over a range of input voltages.
  
 ===== Materials: ===== ===== Materials: =====
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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 2. 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. An individual device such as a 2N3904 etc. can be used for Q<​sub>​4</​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 (when R<​sub>​2</​sub>​ is 100Ω). 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 2. 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. An individual device such as a 2N3904 etc. can be used for Q<​sub>​4</​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 (when R<​sub>​2</​sub>​ is 100Ω).
  
 +<WRAP round download>​
 **Resources:​** **Resources:​**
   * Fritzing files: [[ https://​minhaskamal.github.io/​DownGit/#/​home?​url=https://​github.com/​analogdevicesinc/​education_tools/​tree/​master/​m2k/​fritzing/​regulated_voltage_reference_bb | regulated_voltage_reference_bb]]   * Fritzing files: [[ https://​minhaskamal.github.io/​DownGit/#/​home?​url=https://​github.com/​analogdevicesinc/​education_tools/​tree/​master/​m2k/​fritzing/​regulated_voltage_reference_bb | regulated_voltage_reference_bb]]
   * LTspice files: [[ https://​minhaskamal.github.io/​DownGit/#/​home?​url=https://​github.com/​analogdevicesinc/​education_tools/​tree/​master/​m2k/​ltspice/​regulated_voltage_reference_ltspice | regulated_voltage_reference_ltspice]]   * LTspice files: [[ https://​minhaskamal.github.io/​DownGit/#/​home?​url=https://​github.com/​analogdevicesinc/​education_tools/​tree/​master/​m2k/​ltspice/​regulated_voltage_reference_ltspice | regulated_voltage_reference_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-9.txt · Last modified: 12 Jul 2019 13:27 by andreeapop