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Digital Logic Symbols and Example Circuits for Electronics Designers

Explore standard graphic symbols for gates, adders, decoders, flip-flops, shift registers, counters, and RAM in digital electronics. Detailed examples and qualifying symbols included.

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Digital Logic Symbols and Example Circuits for Electronics Designers

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  1. FIGURE 10.1 Rectangular‐shape graphic symbols for gates

  2. FIGURE 10.2 Standard graphic symbol for a four‐bit parallel adder, IC type 7483

  3. FIGURE 10.3 Standard graphic symbol for a 2‐to‐4‐line decoder (one‐half of IC type 74155)

  4. Table 10.1 General Qualifying Symbols

  5. FIGURE 10.4 Qualifying symbols associated with inputs and outputs

  6. FIGURE 10.5 Example of G (AND) dependency

  7. FIGURE 10.6 IC type 74155 connected as a 3 × 8 decoder

  8. FIGURE 10.7 Graphic symbols for multiplexers

  9. FIGURE 10.8 Standard graphic symbols for flip‐flops

  10. FIGURE 10.9 IC flip‐flops with direct set and reset

  11. FIGURE 10.10 Graphic symbol for IC type 74175 quad flip-flop

  12. FIGURE 10.11 Graphic symbol for a shift register with parallel load, IC type 74195

  13. FIGURE 10.12 Graphic symbol for a bidirectional shift register with parallel load, IC type 74194

  14. FIGURE 10.13 Graphic symbol for ripple counter, IC type 7493

  15. FIGURE 10.14 Graphic Symbol for 4‐Bit Binary Counter with Parallel Load, IC Type 74161

  16. FIGURE 10.15 Graphic symbol for 16×4 RAM, IC type 74189

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