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ELECTRONICS & COMMUNICATIONELECTRONICS & COMMUNICATIONSUB: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 frequencyMiller EffectAmplifiers Frequency ResponseAmplifiers High Frequency ResponseAmplifiers 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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10Figure 8.24a A feedback impedance can be replaced by impedances in parallel with the input and output terminals.

Miller Effect and Approximation

11Figure 8.24b A feedback impedance can be replaced by impedances in parallel with the input and output terminals.

Miller Effect and Approximation

12Figure 8.18 High-frequency FET equivalent circuit.

MOS at high frequency

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