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university:courses:electronics:electronics-lab-20 [05 Mar 2019 12:31]
amiclaus
university:courses:electronics:electronics-lab-20 [12 Jul 2019 13:57] (current)
andreeapop
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-====== Activity ​20. CMOS Amplifier stages======+====== ActivityCMOS Amplifier stages======
  
 ===== Objective: ===== ===== Objective: =====
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 The goal is to explore a high gain inverting amplifier constructed from complementary MOS devices. The goal is to explore a high gain inverting amplifier constructed from complementary MOS devices.
  
-====== ​20.1 High gain inverting amplifier======+====== High gain inverting amplifier======
  
 ===== Materials: ===== ===== Materials: =====
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 <WRAP centeralign>​ Figure 5 CMOS inverting amplifier Scopy plot </​WRAP> ​ <WRAP centeralign>​ Figure 5 CMOS inverting amplifier Scopy plot </​WRAP> ​
  
-====== ​20.2 Adding negative feedback ======+====== Adding negative feedback ======
  
 On your solder-less breadboard construct the amplifier circuit shown in figure 4 below. ​ On your solder-less breadboard construct the amplifier circuit shown in figure 4 below. ​
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 What is the gain from the input source, W1, to the output seen at the inverter output? Which components set this gain and why? What is the gain from the input source, W1, to the output seen at the inverter output? Which components set this gain and why?
  
-====== ​20.3 Adding more stages for higher gain ======+====== ​ Adding more stages for higher gain ======
  
 On your solder-less breadboard construct the amplifier circuit shown in figure 5 below. ​ On your solder-less breadboard construct the amplifier circuit shown in figure 5 below. ​
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 ===== Questions: ===== ===== Questions: =====
  
-====== ​20.4 Chopper Amplifier ======+====== ​ Chopper Amplifier ======
  
 In this part of the lab activity, the CD4069A(UB) un-buffered hex CMOS inverter and a CD4066 Quad analog switch are used as elements of a chopper amplifier. Reconnect the breadboard as indicated in figure 6. Referring to figure 6, the various functions of this circuit can be determined. The two inverters on the bottom left of figure 6 create a square wave and its complement to drive the switch controls of the CD4066. These square waves drive the switches, with switches A and B functioning as a single-pole,​ double-throw switch on the input, and switches C and D performing the same function on the output. The other inverter at the top of figure 6 is used as an AC coupled Amplifier similar to what we just looked at in figure 4. In this part of the lab activity, the CD4069A(UB) un-buffered hex CMOS inverter and a CD4066 Quad analog switch are used as elements of a chopper amplifier. Reconnect the breadboard as indicated in figure 6. Referring to figure 6, the various functions of this circuit can be determined. The two inverters on the bottom left of figure 6 create a square wave and its complement to drive the switch controls of the CD4066. These square waves drive the switches, with switches A and B functioning as a single-pole,​ double-throw switch on the input, and switches C and D performing the same function on the output. The other inverter at the top of figure 6 is used as an AC coupled Amplifier similar to what we just looked at in figure 4.
university/courses/electronics/electronics-lab-20.txt · Last modified: 12 Jul 2019 13:57 by andreeapop