Determine RB1 and VBB for a silicon PUT if it is determined that h = 0.8, VP = 10.3 V, and RB2 = 5 kΩ..

Question

Determine [latex]R_{B_{1}}[/latex] and [latex]V_{B B}[/latex] for a silicon PUT if it is determined that [latex]\eta=0.8, V_{P}=10.3 V[/latex], and[latex]R_{B_{2}}=5 k \Omega .[/latex]

Accepted Answer

Eq. (17.4): [latex]\eta=\frac{R_{B_{2}}}{R_{B_{1}}+R_{B_{2}}}=0.8[/latex]

[latex]R_{B_{1}}=0.8\left(R_{B_{1}}+R_{B_{2}}\right)[/latex]

[latex]0.2 R_{B_{1}}=0.8 R_{B_{2}}[/latex]

[latex]R_{B_{1}}=4 R_{B_{2}}[/latex]

[latex]R_{B_{1}}=4(5 k \Omega)=20 k \Omega[/latex]

Eq. (17.20): [latex]V_{P}=\eta V_{B B}+V_{D}[/latex]

[latex]10.3 V =(0.8)\left(V_{B B}\right)+0.7 V[/latex]

[latex]9.6 V =0.8 V_{B B}[/latex]

[latex]V_{B B}=12 V[/latex]

Question 17.2: Determine RB1 and VBB for a silicon PUT if it is determined ...

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