I have no problem with the solution method, but my issue lies in drawing the small triangle. Can you facilitate the process of drawing it? Determine the magnitude of gm for a JFET with IDss = 8 mA and Vp = -4 V at the following de bias points: (a) VGs=-0.5 V. (b) VGS -1.5 V. (c) VGS-2.5 V. Solution The transfer characteristics are generated as Fig. 9.2 using the procedure defined in Chapter 6. Each operating point is then identified and a tangent line is drawn at each point to best reflect the slope of the transfer curve in this region. An appropriate in- crement is then chosen for VGs to reflect a variation to either side of each Q-point. Equation (9.2) is then applied to determine gm. AID 2.1 mA E (a) gm = = 3.5 mS AVGS 0.6 V Alp 1.8 mA (b) gm = =2.57 mS AVGS 0.7 V (c) gm Alp AVGS 1.5 mA = = 1.5 mS 1.0 V Note the decrease in gm as VGs approaches Vp. AID (mA) 8 7 8mat-0.5 V 6 2.1 mA ID=8 mA mA (1- Vas) 2 5 0.6 V 4 Bat-1.5 V 1.8 mA-3 2 8mat-2.5 V 0.7 V 1.5 mA 1 1.0 V 0 VGS (V) Figure 9.2 Calculating gm at various bias points.

I have no problem with the solution method, but my issue lies in drawing the small triangle. Can you facilitate the process of drawing it? Determine the magnitude of gm for a JFET with IDss = 8 mA and Vp = -4 V at the following de bias points: (a) VGs=-0.5 V. (b) VGS -1.5 V. (c) VGS-2.5 V. Solution The transfer characteristics are generated as Fig. 9.2 using the procedure defined in Chapter 6. Each operating point is then identified and a tangent line is drawn at each point to best reflect the slope of the transfer curve in this region. An appropriate in- crement is then chosen for VGs to reflect a variation to either side of each Q-point. Equation (9.2) is then applied to determine gm. AID 2.1 mA E (a) gm = = 3.5 mS AVGS 0.6 V Alp 1.8 mA (b) gm = =2.57 mS AVGS 0.7 V (c) gm Alp AVGS 1.5 mA = = 1.5 mS 1.0 V Note the decrease in gm as VGs approaches Vp. AID (mA) 8 7 8mat-0.5 V 6 2.1 mA ID=8 mA mA (1- Vas) 2 5 0.6 V 4 Bat-1.5 V 1.8 mA-3 2 8mat-2.5 V 0.7 V 1.5 mA 1 1.0 V 0 VGS (V) Figure 9.2 Calculating gm at various bias points.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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