Find th evalues of $r_{p} μ$ annd $g_{m}$ of a triode operating at plate voltage 200 $V^{p}$ and grid voltage -6V. The plate characteristics are shown in figure (41-E1).

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Solution

We have $r_{p} = (\frac{δ V_{p}}{δ I_{p}})$ Constant at $V_{g}$
Consider the two points on $V_{g} = - 6 l i n e$
$r_{p} = \frac{(240 - 160) V}{(13 - 3) \times 10^{- 3} A} = \frac{80}{10} \times 10^{3} Ω = 8 K Ω g_{m} = (\frac{δ I_{p}}{δ V_{0}}) = Constant$
considering th epoints on 200 V line
$g_{m} = \frac{(13 - 3) \times 10^{- 3}}{[(- 4) + (- 8)]} A = \frac{10 \times 10^{- 3}}{4} = 2.5 m i l i m h o μ = r_{p} \times g_{m} = 8 \times 10^{3} Ω \times 2.5 \times 10^{- 3} Ω^{- 1} = 8 \times 2.5 = 20$

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Find th evalues of rpμ annd gm of a triode operating at plate voltage 200 Vp and grid voltage -6V. The plate characteristics are shown in figure (41-E1).

We have rp=(δVpδIp) Constant at Vg Consider the two points on Vg=−6line rp=(240−160)V(13−3)×10−3A=8010×103Ω=8KΩgm=(δIpδV0)=Constant considering th epoints on 200 V line gm=(13−3)×10−3[(−4)+(−8)]A=10×10−34=2.5milimhoμ=rp×gm=8×103Ω×2.5×10−3Ω−1=8×2.5=20

Find th evalues of $r_{p} μ$ annd $g_{m}$ of a triode operating at plate voltage 200 $V^{p}$ and grid voltage -6V. The plate characteristics are shown in figure (41-E1).