Ming c wu mos cascode amplier av gm rout av g m1 1

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Unformatted text preview: MOS Cascode Stage Rout = (1 + g m1rO1 )rO 2 + rO1 Rout ≈ g m1rO1rO 2 §༊  Unlike a BJT cascode, the output impedance is not limited by β. EE105, Fall 2013 Lecture 20 – Slide 12 Prof. Ming C. Wu 6 PMOS Cascode Stage Rout = (1 + g m1rO1 )rO 2 + rO1 Rout ≈ g m1rO1rO 2 EE105, Fall 2013 Lecture 20 – Slide 13 Prof. Ming C. Wu Short- Circuit Transconductance §༊  The short- circuit transconductance is a measure of the strength of a circuit in converIng an input voltage signal into an output current signal: Gm ≡ iout vin vout =0 §༊  The voltage gain of a linear circuit is Av = −Gm Rout (Rout is the output resistance of the circuit) EE105, Fall 2013 Lecture 20 – Slide 14 Prof. Ming C. Wu 7...
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