Question

For the given circuit, find the small-signal voltage gain $A_v = v_o / v_i$. Draw the small-signal equivalent circuit. Assume MOSFET is in saturation mode, and the BJT is in forward active mode. $C_{C1}$, $C_{C2}$, $C_{C2}$ are sufficiently large. For JFET: $I_{DSS} = 16$ mA, $V_P = -8$ V and $V_A = infty$, (use $I_D = I_{DSS}(1 - frac{V_{GS}}{V_P})^2$, $g_m = frac{2I_{DSS}}{|V_P|}(1 - frac{V_{GS}}{V_P})$. For BJT: $eta = 85$, $V_{BE} = 0.7$ V, $V_A = infty$, $V_T = 25$ mV.

          For the given circuit, find the small-signal voltage gain $A_v = v_o / v_i$. Draw the small-signal equivalent circuit. Assume MOSFET is in saturation mode, and the BJT is in forward active mode. $C_{C1}$, $C_{C2}$, $C_{C2}$ are sufficiently large.
For JFET: $I_{DSS} = 16$ mA, $V_P = -8$ V and $V_A = infty$,
(use $I_D = I_{DSS}(1 - frac{V_{GS}}{V_P})^2$, $g_m = frac{2I_{DSS}}{|V_P|}(1 - frac{V_{GS}}{V_P})$.
For BJT: $eta = 85$, $V_{BE} = 0.7$ V, $V_A = infty$, $V_T = 25$ mV.

$For the given circuit, find the small-signal voltage gain Av = vo / vi. Draw the small-signal equivalent circuit. Assume MOSFET is in saturation mode, and the BJT is in forward active mode. CC1, CC2, CC2 are sufficiently large. For JFET: IDSS = 16 mA, VP = -8 V and VA = infty, (use ID = IDSS(1 - fracVGSVP)^2, gm = frac2IDSS|VP|(1 - fracVGSVP). For BJT: eta = 85, VBE = 0.7 V, VA = infty, VT = 25 mV.$

Added by Christina S.

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