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11.8: Ejercicios

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11.8.1: Problemas de análisis

1. Para el amplificador de la Figura$$\PageIndex{1}$$, determinar$$Z_{in}$$ y$$A_v$$. $$I_{DSS}$$= 12 mA,$$V_{GS(off)}$$ = −2 V,$$V_{DD}$$ = 15 V,$$R_G$$ = 220 k$$\Omega$$,$$R_D$$ = 2 k$$\Omega$$,$$R_L$$ = 3.3 k$$\Omega$$,$$R_S$$ = 330$$\Omega$$.

2. Para el amplificador de la Figura$$\PageIndex{1}$$, determinar$$Z_{in}$$ y$$V_{out}$$. $$V_{in}$$= 50 mV,$$I_{DSS}$$ = 15 mA,$$V_{GS(off)}$$ = −3 V,$$V_{DD}$$ = 20 V,$$R_G$$ = 270 k$$\Omega$$,$$R_D$$ = 2 k$$\Omega$$,$$R_L$$ = 6.8 k$$\Omega$$,$$R_S$$ = 270$$\Omega$$.

Figura$$\PageIndex{1}$$

3. Para el amplificador de la Figura$$\PageIndex{2}$$, determinar$$Z_{in}$$ y$$V_{out}$$. $$V_{in}$$= 60 mV,$$I_{DSS}$$ = 10 mA,$$V_{GS(off)}$$ = −3 V,$$V_{DD}$$ = 20 V,$$V_{SS}$$ = −6 V,$$R_G$$ = 270 k$$\Omega$$,$$R_D$$ = 2 k$$\Omega$$,$$R_L$$ = 4 k$$\Omega$$,$$R_S$$ = 1.8 k$$\Omega$$,$$R_{SW}$$ = 200$$\Omega$$.

Figura$$\PageIndex{2}$$

4. Para el amplificador de la Figura$$\PageIndex{2}$$, determinar$$Z_{in}$$ y$$A_v$$. $$I_{DSS}$$= 12 mA,$$V_{GS(off)}$$ = −2 V,$$V_{DD}$$ = 18 V,$$V_{SS}$$ = −4 V,$$R_G$$ = 330 k$$\Omega$$,$$R_D$$ = 2.2 k$$\Omega$$,$$R_L$$ = 10 k$$\Omega$$,$$R_S$$ = 3 k$$\Omega$$,$$R_{SW}$$ = 100$$\Omega$$.

5. Para el amplificador de la Figura$$\PageIndex{3}$$, determinar$$Z_{in}$$ y$$A_v$$. $$I_{DSS}$$= 12 mA,$$V_{GS(off)}$$ = −2 V,$$V_{DD}$$ = 18 V,$$V_{EE}$$ = −4 V,$$R_G$$ = 390 k$$\Omega$$,$$R_D$$ = 2.2 k$$\Omega$$,$$R_E$$ = 1 k$$\Omega$$,$$R_L$$ = 20 k$$\Omega$$.

Figura$$\PageIndex{3}$$

6. Para el amplificador de la Figura$$\PageIndex{3}$$, determinar$$Z_{in}$$ y$$V_{out}$$. $$V_{in}$$= 70 mV,$$I_{DSS}$$ = 12 mA,$$V_{GS(off)}$$ = −2 V,$$V_{DD}$$ = 18 V,$$V_{EE}$$ = −4 V,$$R_G$$ = 390 k$$\Omega$$,$$R_D$$ = 2.2 k$$\Omega$$,$$R_L$$ = 20 k$$\Omega$$.

7. Para el circuito de la Figura$$\PageIndex{4}$$, determinar$$Z_{in}$$ y$$A_v$$. $$I_{DSS}$$= 12 mA,$$V_{GS(off)}$$ = −2 V,$$V_{DD}$$ = 10 V,$$R_G$$ = 220 k$$\Omega$$,$$R_L$$ = 3.3 k$$\Omega$$,$$R_S$$ = 330$$\Omega$$.

Figura$$\PageIndex{4}$$

8. Para el circuito de la Figura$$\PageIndex{4}$$, determinar$$Z_{in}$$ y$$V_{out}$$. $$V_{in}$$= 200 mV,$$I_{DSS}$$ = 15 mA,$$V_{GS(off)}$$ = −3 V,$$V_{DD}$$ = 12 V,$$R_G$$ = 270 k$$\Omega$$,$$R_L$$ = 1.8 k$$\Omega$$,$$R_S$$ = 270$$\Omega$$.

9. Para el circuito de la Figura$$\PageIndex{5}$$, determinar$$Z_{in}$$ y$$V_{out}$$. $$V_{in}$$= 100 mV,$$I_{DSS}$$ = 10 mA,$$V_{GS(off)}$$ = −3 V,$$V_{DD}$$ = 15 V,$$V_{SS}$$ = −6 V,$$R_G$$ = 470 k$$\Omega$$,$$R_L$$ = 4 k$$\Omega$$,$$R_S$$ = 1.8 k$$\Omega$$.

Figura$$\PageIndex{5}$$

10. Para el circuito de la Figura$$\PageIndex{5}$$, determinar$$Z_{in}$$ y$$A_v$$. $$I_{DSS}$$= 18 mA,$$V_{GS(off)}$$ = −2 V,$$V_{DD}$$ = 14 V,$$V_{SS}$$ = −6 V,$$R_G$$ = 360 k$$\Omega$$,$$R_L$$ = 10 k$$\Omega$$,$$R_S$$ = 1 k$$\Omega$$.

11. Para el circuito de la Figura$$\PageIndex{6}$$, determinar$$V_{out}$$. $$V_{in}$$= 100 mV,$$r_{DS(on)}$$ = 50$$\Omega$$,$$r_{DS(off)}$$ = 1 M$$\Omega$$,$$V_{GS(off)}$$ = −3 V,$$V_C$$ = −6 V,$$R_G$$ = 270 k$$\Omega$$,$$R_D$$ = 6.8 k$$\Omega$$.

12. Para el circuito de la Figura$$\PageIndex{6}$$, determinar$$V_{out}$$. $$V_{in}$$= 100 mV,$$r_{DS(on)}$$ = 75$$\Omega$$,$$r_{DS(off)}$$ = 750 k$$\Omega$$,$$V_{GS(off)}$$ = −3 V,$$V_C$$ = 0 V,$$R_G$$ = 180 k$$\Omega$$,$$R_D$$ = 5.1 k$$\Omega$$.

Figura$$\PageIndex{6}$$

11.8.2: Problemas de Desafío de Diseño

13. Siguiendo el circuito de la Figura$$\PageIndex{2}$$, diseñe un amplificador con una ganancia de al menos 4 y una impedancia de entrada de al menos 300 k$$\Omega$$. $$R_L$$= 10 k$$\Omega$$. El JFET tiene los siguientes parámetros:$$V_{GS(off)}$$ = −2 V,$$I_{DSS}$$ = 15 mA. Intente usar valores de resistencia estándar.

14. Usando el circuito de la Figura$$\PageIndex{4}$$, diseñe un seguidor con una ganancia de al menos 0.7 y una impedancia de entrada de al menos 500 k$$\Omega$$. $$R_L$$= 1 k$$\Omega$$. El JFET tiene los siguientes parámetros:$$V_{GS(off)}$$ = −3 V,$$I_{DSS}$$ = 20 mA. Intente usar valores de resistencia estándar.

11.8.3: Problemas de simulación por computadora

15. Utili$$Z_{in}$$ g hojas de datos del fabricante, encontrar dispositivos con las siguientes especificaciones (típicas) y verificarlos utilizando las técnicas de medición presentadas en el capítulo anterior. Dispositivo 1:$$V_{GS(off)}$$ = −2 V,$$I_{DSS}$$ = 15 mA. Dispositivo 2:$$V_{GS(off)}$$ = −3 V,$$I_{DSS}$$ = 20 mA.

16. Usando el modelo de dispositivo del problema anterior, verifique el diseño del Problema 13.

17. Usando el modelo de dispositivo del Problema 15, verifique el diseño del Problema 14.

This page titled 11.8: Ejercicios is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by James M. Fiore via source content that was edited to the style and standards of the LibreTexts platform.