The attached file is common-source stage. The circuit has a gain:
\(A_{v}=-g_{m}R_{D}= -\sqrt {2\mu _{n}c_{0x}\dfrac {w} {L}I_{D}}\dfrac {V_{RD}} {I_{D}}\)
Then in order to maximize the voltage gain of common-source stage, my book say that:
1. Increase \(\dfrac {W} {L}\) and other parameters are constant
2. Increase \(V_{RD}\) and other parameters are constant
3. Decrease \(I_{D}\) and other parameters are constant
I understand #1 completely but both #2 and #3 are really confusing me.
I want to know how can you do that, for example, increase \(V_{RD}\)
but keep \(I_{D}\) constant or decrease \(I_{D}\) and keep
\(V_{RD}\) constant.
\(A_{v}=-g_{m}R_{D}= -\sqrt {2\mu _{n}c_{0x}\dfrac {w} {L}I_{D}}\dfrac {V_{RD}} {I_{D}}\)
Then in order to maximize the voltage gain of common-source stage, my book say that:
1. Increase \(\dfrac {W} {L}\) and other parameters are constant
2. Increase \(V_{RD}\) and other parameters are constant
3. Decrease \(I_{D}\) and other parameters are constant
I understand #1 completely but both #2 and #3 are really confusing me.
I want to know how can you do that, for example, increase \(V_{RD}\)
but keep \(I_{D}\) constant or decrease \(I_{D}\) and keep
\(V_{RD}\) constant.
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