1. © Bob York Transistor Basics Control Terminal I(V) I(V, V c ) I(V, I c ) or V V V c or I c FETs BJTs

2. © Bob York JFETs V gs Gate Source Drain I ds (V gs,V ds ) V ds I d V gs V ds I g = 0 Gate Source Drain Saturation region I D V gs ≤ V t (cutoff) Ohmic or Triode region V ds V gs = V t + 0.5 V gs = V t + 1.0 V gs = V t + 1.5 V gs = 0 G D S I dss Increasing V gs N-ch JFET

3. © Bob York MOSFET V gs Gate Source Drain I ds (V gs,V ds ) V ds I d V gs V ds I g = 0 Gate Source Drain Saturation region I D V gs ≤ V t (cutoff) Ohmic or Triode region V ds V gs = V t + 0.5 V gs = V t + 1.0 V gs = V t + 1.5 V gs = V t + 2.0 G D S Increasing V gs NMOS

4. © Bob York Family Tree Field-Effect Transistors JFET, MESFET Depletion-mode (normally on) n-chp-ch MOSFET Depletion-mode (normally on) Enhancement-mode (normally off) n-chp-chn-chp-ch

5. © Bob York BJTs IbIb Ic=αFIEIc=αFIE I c v ce I b Base Emitter Collector I c,, mA Forward active region V CE 70 μA Increasing I b NPN BJT B E C IEIE v be v cb 60 μA 50 μA 40 μA 30 μA 20 μA 10 μA 0 μA V ce,sat IbIb Ic=βIBIc=βIB B C E 2 4 6 8 I e

6. © Bob York JFET Experiments I ds Gate Source Drain V gs A V ds V g = ?V out I d +12 V R = ? V out I d +12 V R D R S = ? V gs

7. © Bob York 2N7000 MOSFET Experiments I D Gate Source Drain V gs A V ds 3 V 1 μF V out I d +10 V R D R S = ? V gs V g =5V VdVd I d +10 V V gs VsVs R S = ? R D VdVd I d +10 V V gs VsVs RSRS R D 100 kΩ I g = 0 V g =5V R g = ?

8. © Bob York V out MOS & CMOS +10 V RSRS V in 0 V 5 V +10 V V in 0 V 5 V V out R D V DD V in R D R L V DD V in V out R L NMOS PMOS V out I d +10 V R g V gs 1 kΩ 200 Ω 3 MΩ

9. © Bob York CD4007 2 4 1 5 3 P N P 14 13 12 11 10 9 8 N N P V DD V SS 7 6 5 4 3 2 1 14 7 13 8 6 11 9 1210

10. © Bob York 2N3904 0μA0μA 25μA 50μA 75μA 100μA 125μA 150μA 175μA 200μA IbIb Collector Current, I c [Amps] Collector-Emitter Voltage, V ce [Volts] 2N3904

11. © Bob York 2N3906 0μA0μA 25μA 50μA 75μA 100μA 125μA 150μA 175μA 200μA IbIb Collector Current, I c [Amps] Emitter-Collector Voltage, V ec [Volts] 2N3906

12. © Bob York BJT Experiments +5 V 0 V 5 V V out I c R b = ? +10 V +5 V 2N3904 R c = ? V in +5 V 2N3904 2N3906 RbRb RbRb RcRc RcRc f = 1 Hz 2N3904