GTU

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ELECTRONICS & COMMUNICATIONELECTRONICS & COMMUNICATION
SUB:ANALOG CIRCUIT DESIGN
2nd
year (4th
sem)

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ENROLLMENT NO. : NAME:
140330111001 AMETA KRUSHNAKANT G.
140330111009 POTTBATNI SANJAY A.
140330111012 YAGNIK GAGAN R.
Guided by: Mr.Kaushik Patel

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Transistor at High FrequencyTransistor at High Frequency

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Transistor models at high frequency
Miller Effect
Amplifiers Frequency Response
Amplifiers High Frequency Response
Amplifiers Low Frequency Response

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General Model MOS model
rx1 0
ri ∞
Ci Cgs
Cf Cgd
ro ro
Co Cds
rx2 rd
ry rs

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Practical considerations using the
simplified general model

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Figure 8.24a A feedback impedance can be replaced by impedances in parallel
with the input and output terminals.
Miller Effect and Approximation

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Figure 8.24b A feedback impedance can be replaced by impedances
in parallel with the input and output terminals.
Miller Effect and Approximation

12. 12Figure 8.18 High-frequency FET equivalent circuit.
MOS at high frequency

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