MOSFET resistance and gain

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Electrical Engineering

Last updated 7:34 PM on 4/16/24
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23 Terms

1
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<p>What is the Req of a MOSFET when looking into the gate and when there is nothing on the source and drain?</p>

What is the Req of a MOSFET when looking into the gate and when there is nothing on the source and drain?

infinity

2
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<p>What is the Req of a MOSFET when looking into the drain and when there is nothing on the source?</p>

What is the Req of a MOSFET when looking into the drain and when there is nothing on the source?

rds

3
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<p>What is the Req of a MOSFET when looking into the source and when there is nothing on the drain?</p>

What is the Req of a MOSFET when looking into the source and when there is nothing on the drain?

(1/gm) || rds ≈ (1/gm)

4
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<p>What is the Req of a MOSFET when looking into the drain and when Rs is on the source?</p>

What is the Req of a MOSFET when looking into the drain and when Rs is on the source?

Req = Rs + rds + gm(Rs)(rds)

5
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<p>What is the Req of a MOSFET when looking into the source and when Rd is on the drain?</p>

What is the Req of a MOSFET when looking into the source and when Rd is on the drain?

Req ≈ (1/gm)( 1 + Rd/rds)

6
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<p>What is the Req of a MOSFET when looking into the drain and when it is diode connected?</p>

What is the Req of a MOSFET when looking into the drain and when it is diode connected?

Req ≈ (1/gm) || rds

7
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<p>What type of amplifier is this?</p>

What type of amplifier is this?

Common Source (CS)

8
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<p>What type of amplifier is this?</p>

What type of amplifier is this?

Common Source with degeneration (degen)

9
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<p>What type of amplifier is this?</p>

What type of amplifier is this?

Common Gate (CG)

10
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<p>What type of amplifier is this?</p>

What type of amplifier is this?

Common Gate with Source Resistance

11
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<p>What type of amplifier is this?</p>

What type of amplifier is this?

Common Drain

12
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What is the Gm value of a Common Source Amplifier?

gm

13
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What is the Gm value of a Common Source with Degeneration Amplifier?

gm/(1+gmRs)

14
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What is the Gm value of a Common Gate Amplifier?

-gm

15
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What is the Gm value of a Common Gate with Source Resistance Amplifier?

-gm/(1+gmRs)

16
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What is the Gm value of a Common Drain Amplifier?

-gm

17
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What is the Gm value of a Common Emitter Amplifier?

<p></p>
18
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What is the Gm value of a Common Base Amplifier?

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19
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What is the Gm value of a Common Collector Amplifier?

knowt flashcard image
20
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<p>Assuming ro → infinity, What is Req for a diode connected BJT?</p>

Assuming ro → infinity, What is Req for a diode connected BJT?

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21
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<p>Assuming ro → infinity, What is Req for a BJT when looking into the base and there is stuff on C and E?</p>

Assuming ro → infinity, What is Req for a BJT when looking into the base and there is stuff on C and E?

<p></p>
22
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<p>Assuming ro → infinity, What is Req for a BJT when looking into the emitter and there is stuff on B and C?</p>

Assuming ro → infinity, What is Req for a BJT when looking into the emitter and there is stuff on B and C?

knowt flashcard image
23
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Assuming ro → infinity, What is Req for a BJT when looking into the Collector and there is stuff on B and E?

Infinity