Collecter driven load with NPN diode drop iBE = (VIN ) / RIN – iCE = hFE iBE iM = iCE = VIN > Emitter driven load with NPN iBE = (VIN VE / RIN ) – – iCE = hFE iBE = hFE (VIN VE / RIN ) – – iM = iCE + iBE = (1 + hFE)(VIN VE / RIN ) – – VE = iM RM iM = (1 + hFE)(VIN iM RM / RIN solve for iM ) – – VIN > iM RM +
Collecter driven load with NPN diode drop iBE = (VIN – ) / RIN iCE = hFE iBE iM = iCE = VIN > Emitter driven load with NPN iBE = (VIN – VE – ) / RIN iCE = hFE iBE = hFE (VIN – VE – ) / RIN iM = iCE + iBE = (1 + hFE)(VIN – VE – ) / RIN VE = iM RM iM = (1 + hFE)(VIN – iM RM – ) / RIN solve for iM VIN > iM RM +
N03_semiconductors.docx