Terminal Impedances Eq. 5.162 Eq. 5.198 Eq. 5.291.

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Presentation transcript:

Terminal Impedances Eq Eq Eq

BJT & MOS Transistor [Chapter 4,5] [Chapter 6,7]

Analogous Devices Terminals – “C”↔”D” – “E” ↔”S” – “B” ↔”G” Analogous Devices – NPN ↔NMOS – PNP ↔PMOS

Equivalent Circuit

Small Signal Model Observations: 1.Both Q1 and Q2 are represented by the SAME small signal circuit. 2.To find the output resistance, find the terminal resistance by applying a test voltage.

Big Picture

A Crude Metal Oxide Semiconductor (MOS) Device P-Type Silicon is slightly conductive. Positive charge attract negative charges to interface between insulator and silicon. A conductive path is created If the density of electrons is sufficiently high. Q=CV. V2 causes movement of negative charges, thus current. V1 can control the resistivity of the channel. The gate draws no current!

Resistance into the Base/Gate

Analogous Circuits

Three Derivations Eq Eq Eq