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Chapter 1 Introduction: Digital Systems & Logic Design By Taweesak Reungpeerakul
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242-208 CH12 Digital Systems Digital and Analog Quantities Parameters of Pulse Waveform Basic Logic Combinational Logic Digital Integrated Circuits An example of Digital System Design Flow
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242-208 CH13 1.1 Digital & Analog Quantities Analog Quantity? Continuous Values Digital Quantity? Discrete Set of Values Which one has more advantages? Digital Quantity (process & transmit) Efficiency Reliability
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242-208 CH14 Analog & Digital Example
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242-208 CH15 Analog & Mixed System Analog System Digital and Analog System
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242-208 CH16 1.2 Binary Digits, Logic Levels, and Digital Waveforms Binary Digits: 0 Low, 1 High Code: Group of Bits Logic Level: represented by voltages
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242-208 CH17 Digital Waveforms Pulse Positive-going pulseNegative-going pulse Waveform Characteristic Question t W : pulse width t r : rise time t f : fall time T : period f : frequency f = 1/T T = 1/f Duty Cycle = ( t w / T ) 100%
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242-208 CH18 Clock and Bits Waveforms Clock is a periodic waveform (signal) in which each interval between pulse equals the time for one bit
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242-208 CH19 Timing Diagrams How 2 or more waveforms change and relate
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242-208 CH110 1.3 Basic Logic Operations NOTANDOR Symbol Truth Table In Out 0 1 1 0 In 1 In 2 Out 0 0 0 0 1 0 1 0 0 1 1 1 In 1 In 2 Out 0 0 0 0 1 1 1 0 1 1 1 1
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242-208 CH111 1.4 Basic Logic Functions
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242-208 CH112 Basic Logic Functions (cont) Mux Demux n 2n2n
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242-208 CH113 Basic Logic Functions (cont) Flip-flops Counters Registers
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242-208 CH114 1.5 Digital Integrated Circuits IC Packages: DIP, SMT, SOIC, PLCC, LCCC, FP IC Complexity Classifications SSI: gate ≥ 12, basic gates & flip-flops MSI: 12 ≤ gate ≥ 99, logic functions LSI: 100 ≤ gate ≥ 9999, including memory VLSI: 10,000 ≤ gate ≥ 99,999 ULSI: gate ≥ 100,000
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242-208 CH115 Integrated Circuit Technologies Types of Transistors Bipolar Junction Transistors MOSFETs (metal-oxide semiconductor field-effect transistors) Bipolar used in: transistor-transistor logic (TTL) and emitter-couple logic (ECL) MOSFETs used in: complementary MOS (CMOS) and n-channel MOS (NMOS)
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242-208 CH116 1.6 Testing and Troubleshooting Instruments Oscilloscope Analog Digital Logic Analyzer DC Power Supply Function Generator Digital Multimeter
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242-208 CH117 1.7 Digital System Application
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242-208 CH118 Design Flow
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