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Digital ICs1960’s Integrated circuits (Ics) –invention IC -- multiple diodes, transistors, and othercomponents fabricated...
SpeedPower consumptioncostMOS --- 10 years before the BJT invention principles ofMOS are patented     lagged BJT in speed ...
3
Small to medium scale integration ------TTLwas the choiceTTL was largely replaced by CMOS in 1990s                       ...
Digital ICsBipolar Logic ---- Diodes and transistorsDiode logic (DL) ---- Diodes and resistors – toperform logic operati...
CMOS logic ------ logic circuit operates on 5 Vpower supply                                                  6
Various Series within CMOS family                                    7
TTL Logic            8
Various Series within TTL family                                   9
DIODE Logic              10
11
Diode AND gate                 12
13
14
15
Bipolar Junction Transistors                               16
17
Mode         EBJ       CBJActive       Forward   ReverseCutoff       Reverse   ReverseSaturation   Forward   Forward      ...
19
20
21
22
Storage time --- Propagation delay                                     23
The propagation delay of a signal path is the amountof time it takes for a change in the input signal toproduce a change i...
25
Setup time is the minimum time interval for whichthe input signal must be stable prior to the samplingevent of the clock f...
27
Transistor-transistor logic                              Multiple-emitter                              transistor         ...
DTL Gates            29
Digital i cs
Digital i cs
Digital i cs
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Digital i cs
Digital i cs
Digital i cs
Digital i cs
Digital i cs
Digital i cs
Digital i cs
Digital i cs
Digital i cs
Digital i cs
Digital i cs
Digital i cs
Digital i cs
Digital i cs
Digital i cs
Digital i cs
Digital i cs
Digital i cs
Digital i cs
Digital i cs
Digital i cs
Digital i cs
Digital i cs
Digital i cs
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Digital i cs

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Transcript of "Digital i cs"

  1. 1. Digital ICs1960’s Integrated circuits (Ics) –invention IC -- multiple diodes, transistors, and othercomponents fabricated on a single chipLogic family --- collection of different Integratedchips that have similar input, output, and internalcircuit characteristics that perform different logicfunctionsChips from same logic family can be interconnectedto perform logic functionChips from different logic families may not becompatible 1
  2. 2. SpeedPower consumptioncostMOS --- 10 years before the BJT invention principles ofMOS are patented lagged BJT in speed but lower power consumption and higher level of integrationmid-1980s Complementary MOS Higher speed low power consumption 2
  3. 3. 3
  4. 4. Small to medium scale integration ------TTLwas the choiceTTL was largely replaced by CMOS in 1990s 4
  5. 5. Digital ICsBipolar Logic ---- Diodes and transistorsDiode logic (DL) ---- Diodes and resistors – toperform logic operationsTransistor-transistor logic (TTL) --- transistorsboth to perform logic functions and to boost outputdrive capability.Emitter-Coupled logic ---transistors as currentswitches to achieve very high speedBiCMOS logic - bipolar and MOS transistors-input and logic circuits are CMOS for low powerconsumption, outputs use bipolar transistors toachieve higher driving capability 5
  6. 6. CMOS logic ------ logic circuit operates on 5 Vpower supply 6
  7. 7. Various Series within CMOS family 7
  8. 8. TTL Logic 8
  9. 9. Various Series within TTL family 9
  10. 10. DIODE Logic 10
  11. 11. 11
  12. 12. Diode AND gate 12
  13. 13. 13
  14. 14. 14
  15. 15. 15
  16. 16. Bipolar Junction Transistors 16
  17. 17. 17
  18. 18. Mode EBJ CBJActive Forward ReverseCutoff Reverse ReverseSaturation Forward Forward 18
  19. 19. 19
  20. 20. 20
  21. 21. 21
  22. 22. 22
  23. 23. Storage time --- Propagation delay 23
  24. 24. The propagation delay of a signal path is the amountof time it takes for a change in the input signal toproduce a change in the output signal. 24
  25. 25. 25
  26. 26. Setup time is the minimum time interval for whichthe input signal must be stable prior to the samplingevent of the clock for the input signal to berecognized correctly hold time is the minimum time interval for whichthe input signal must be stable following thesampling event of the clock for the input signal to berecognized correctly 26
  27. 27. 27
  28. 28. Transistor-transistor logic Multiple-emitter transistor 28
  29. 29. DTL Gates 29
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