How Common Source Amplifier Works??
Have a look at the below video
Water Flow Model:
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1. Analogies used in the water flow model are as indicated
Valve 1 as Vg1
Valve 2 as Vg2
Source Width as Width
2.For the existing waterflow system as shown the two valve's are used for controlling the water flow, similar to the biasing voltages of an Amplifier.
Valve 1 is used for setting up the maximum distance the water can travel,which is similar to biasing the P MOS using VG1 with which Upper limit in output voltage is set.
3.Valve 2 is used to apply pressure on the waterflow which increases the distance with which water can travel.
Here the maximum distance is analogous to Overdrive voltage which is biased by making use Vg2 of N MOS.
4.Valve 2 is used to release pressure on the waterflow which decreases the distance with which water can travel.
Here the minimum distance is analogous to Overdrive voltage which is biased by making use Vg2 of N MOS.
5.Based on Minimum/Maximum distance travelled we can decide the Distance swing which is similar to the voltage swing.
6. Based on the source width variation we will have the water flow variation , which is analogous to the variation in width ,which varies current ,which varies the Gm and inturn varies the gain of the amplifier.
There at the Input pipe we can see the water flow with its pressure variation which is anologous to the applying a varying input voltage
The output is interms of travel distance variation of water ,which is analogous to the output voltage variations.
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1. Analogies used in the water flow model are as indicated
Valve 1 as Vg1
Valve 2 as Vg2
Source Width as Width
2.For the existing waterflow system as shown the two valve's are used for controlling the water flow, similar to the biasing voltages of an Amplifier.
Valve 1 is used for setting up the maximum distance the water can travel,which is similar to biasing the P MOS using VG1 with which Upper limit in output voltage is set.
3.Valve 2 is used to apply pressure on the waterflow which increases the distance with which water can travel.
Here the maximum distance is analogous to Overdrive voltage which is biased by making use Vg2 of N MOS.
4.Valve 2 is used to release pressure on the waterflow which decreases the distance with which water can travel.
Here the minimum distance is analogous to Overdrive voltage which is biased by making use Vg2 of N MOS.
5.Based on Minimum/Maximum distance travelled we can decide the Distance swing which is similar to the voltage swing.
6. Based on the source width variation we will have the water flow variation , which is analogous to the variation in width ,which varies current ,which varies the Gm and inturn varies the gain of the amplifier.
There at the Input pipe we can see the water flow with its pressure variation which is anologous to the applying a varying input voltage
The output is interms of travel distance variation of water ,which is analogous to the output voltage variations.
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