Question
For the inverter circuit in problem 14.21, $V_T=0.7 \mathrm{~V}$ and $V_{O L}$ is determined to be $0.2 \mathrm{~V}$. If the value of $r_{o n}$ for the input transistor is $120 \Omega$, find the values of $N M_L$ and the effective resistance of the load device.
Step 1
We have: - Threshold voltage, \( V_T = 0.7 \, \text{V} \) - Output low voltage, \( V_{OL} = 0.2 \, \text{V} \) - Output resistance of the input transistor, \( r_{on} = 120 \, \Omega \) Show more…
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A transistor with \[ \begin{array}{cl} h_{f e}=120, & h_{i e}=2 \mathrm{k} \Omega \\ h_{r e}=10^{-4}, & h_{o e}=20 \mu \mathrm{S} \end{array} \] is used for a CE amplifier to provide an input resistance of $1.5 \mathrm{k} \Omega$ (a) Determine the necessary load resistance $R_{L}.$ (b) Calculate $A_{v}, A_{i},$ and $Z_{\text {out }}$ if the amplifier is driven by a $4 \mathrm{mV}$ source having an internal resistance of $600 \Omega.$ (c) Find the voltage across the load.
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