Small-Signal Networks Parameters (handouts) (1).pdf

Small-Signal Networks Parameters (handouts) (1).pdf - ECE...

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1 ECE403 - Fundamentals to Electronics Engineering Spring 2018 - © Morteza Abbasi ECE403 Spring 2018 - © Morteza Abbasi ECE 403 Fundamentals to Electronics Engineering S MALL -S IGNAL N ETWORK P ARAMETERS ECE403 Spring 2018 - © Morteza Abbasi ECE 403 Fundamentals to Electronics Engineering S MALL -S IGNAL N ETWORK P ARAMETER Establishing the Quiescent Point
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2 ECE403 - Fundamentals to Electronics Engineering Spring 2018 - © Morteza Abbasi ECE403 Spring 2018 - © Morteza Abbasi I DQ V=V DQ i v i=f(v) (V DQ , I DQ ) V DQ I DQ V DQ I DQ =f(V DQ ) Set the voltage, current will be set B IASING : E STABLISHING THE Q UIESCENT P OINT Lecture 4 - Small-Signal Network Parameters ECE403 Spring 2018 - © Morteza Abbasi I DQ I DQ V DQ I DQ =f(V DQ ) I=I DQ i v i=f(v) (V DQ , I DQ ) V DQ Set the current, voltage will be set B IASING : E STABLISHING THE Q UIESCENT P OINT Lecture 4 - Small-Signal Network Parameters
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3 ECE403 - Fundamentals to Electronics Engineering Spring 2018 - © Morteza Abbasi ECE403 Spring 2018 - © Morteza Abbasi ECE 403 Fundamentals to Electronics Engineering S MALL -S IGNAL N ETWORK P ARAMETER Establishing the Quiescent Point Small-Signal Operation ECE403 Spring 2018 - © Morteza Abbasi i v i=f(v) (V DQ , I DQ ) time time A PPLY THE S IGNAL Add time variation around the quiescent point 𝑣 𝐷 = 𝑉 𝐷𝑄 + 𝑣 𝑑 𝑖 𝐷 = ? 𝑉 𝐷𝑄 + 𝑣 𝑑 time variation on current will be produced by the device 𝐼 𝐷𝑄 + 𝑖 𝑑 = ? 𝑉 𝐷𝑄 + 𝑣 𝑑 × ?? ?𝑣 𝑣=𝑉 𝐷𝑄 Lecture 4 - Small-Signal Network Parameters 𝐼 𝐷𝑄 + 𝑖 𝑑 = 𝐼 𝐷𝑄 + 𝑣 𝑑 × ?? ?𝑣 𝑣=𝑉 𝐷𝑄 𝒊 ? (𝒕) 𝒗 ? (𝒕)
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4 ECE403 - Fundamentals to Electronics Engineering Spring 2018 - © Morteza Abbasi ECE403 Spring 2018 - © Morteza Abbasi i v i=f(v) (V DQ , I DQ ) time time A PPLY THE S IGNAL 𝑖 𝐷 = ? 𝑉 𝐷𝑄 + 𝑣 𝑑 time variation on current will be produced by the device 𝐼 𝐷𝑄 + 𝑖 𝑑 = ? 𝑉 𝐷𝑄 + 𝑣 𝑑 × ??
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