© BMayer@ChabotCollege.edu • ENGR-43_Prob_12-24_pFET_Csource_Amp_Soln.pptx1

Bruce Mayer, PE Engineering-43 • Electrical Circuits & Devices

Bruce Mayer, PELicensed Electrical & Mechanical Engineer

BMayer@ChabotCollege.edu

Engineering 43

Chp12Prob 12.24

SolutionCommon-Source pFET

Amplifier

© BMayer@ChabotCollege.edu • ENGR-43_Prob_12-24_pFET_Csource_Amp_Soln.pptx2

Bruce Mayer, PE Engineering-43 • Electrical Circuits & Devices

ENGR43 P12.24

Use LOAD-LINE Analysis to Find vo(t) for the Ckt below

• Note: This a pFET Circuit

© BMayer@ChabotCollege.edu • ENGR-43_Prob_12-24_pFET_Csource_Amp_Soln.pptx3

Bruce Mayer, PE Engineering-43 • Electrical Circuits & Devices

The pFET Characteristic

© BMayer@ChabotCollege.edu • ENGR-43_Prob_12-24_pFET_Csource_Amp_Soln.pptx4

Bruce Mayer, PE Engineering-43 • Electrical Circuits & Devices

P12.24 GamePlan

Draw LoadLine for the 1 kΩ Resistor load, then find the operating (vDS, iD) Values corresponding to This Set of vGS values • vGS = [7v + 1V•sin(0)] −10V

– This is VGSQ = −3 V

• vGS = [7v + 1V•sin(π)] −10V– This is vGS,max = −4 V

• vGS = [7v + 1V•sin(3π/2)] −10V– This is vGS,min = −2 V

© BMayer@ChabotCollege.edu • ENGR-43_Prob_12-24_pFET_Csource_Amp_Soln.pptx5

Bruce Mayer, PE Engineering-43 • Electrical Circuits & Devices

© BMayer@ChabotCollege.edu • ENGR-43_Prob_12-24_pFET_Csource_Amp_Soln.pptx6

Bruce Mayer, PE Engineering-43 • Electrical Circuits & Devices

© BMayer@ChabotCollege.edu • ENGR-43_Prob_12-24_pFET_Csource_Amp_Soln.pptx7

Bruce Mayer, PE Engineering-43 • Electrical Circuits & Devices

© BMayer@ChabotCollege.edu • ENGR-43_Prob_12-24_pFET_Csource_Amp_Soln.pptx8

Bruce Mayer, PE Engineering-43 • Electrical Circuits & Devices

© BMayer@ChabotCollege.edu • ENGR-43_Prob_12-24_pFET_Csource_Amp_Soln.pptx9

Bruce Mayer, PE Engineering-43 • Electrical Circuits & Devices

© BMayer@ChabotCollege.edu • ENGR-43_Prob_12-24_pFET_Csource_Amp_Soln.pptx10

Bruce Mayer, PE Engineering-43 • Electrical Circuits & Devices