lesson 11 2010 cascaded transistor amplifiers with activities

Lesson 11 2010 cascaded transistor amplifiers with activities

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Unformatted text preview: Cascaded Transistor Amplifiers Cascaded Transistor Amplifiers Objective: after learning this section, you will be able to: Explain the rationale for using cascaded transistor amplifiers. Compute the input resistance, output resistance, voltage gain and load voltage for a cascade of common-emitter transistor amplifiers; Compute the input resistance, output resistance, voltage gain and load voltage for a cascade common-emitter+common-collector transistor amplifiers. Rationale Cascade CE-CE: achieve large voltage gain Individual stages easy to design Cascade CE-CC: Avoid gain degradation associated with low- resistance load CE provides voltage gain; CC provides high R in and low R out Cascade CE-CE Capacitive coupling dc analysis: each stage separately ac analysis: load for first stage = input resistance of second stage RC 1 R in R1 Rs R2 Vs RE 1 R3 RC 2 R4 RE 2 RL VC C Amplifier Model CE-CE Output voltage for cascaded amplifiers:...
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Lesson 11 2010 cascaded transistor amplifiers with activities

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