Digital Logic Design (DLD) Complete Course - 4-Bit Adder Subtractor Circuit | Overflow Detection in Signed & Unsigned Numbers

🔹 Topic: 4-Bit Adder–Subtractor Circuit | Overflow Detection in Signed & Unsigned Numbers 🔹 Course: Digital Logic Design In this video, we solve a complete example based on a 4-bit binary adder–subtractor circuit used in Digital Logic Design (DLD). We take two binary numbers, 👉 A = (1011)₂ and B = (1101)₂, and analyze addition and subtraction operations for both signed and unsigned representations. You will learn: ✅ How to perform binary addition & subtraction using a 4-bit adder ✅ How to detect overflow for both unsigned and signed (two’s complement) numbers ✅ The role of Carry-out (C₄) and Overflow flag (V = C₃ ⊕ C₄) ✅ Why the binary sum remains same but interpretation changes ✅ How to modify the adder circuit using XOR gates for overflow detection This video is very useful for students of: 🎓 BS Computer Science, Electrical Engineering, and FSc (Pre-Engineering) studying Digital Logic Design (DLD) 📘 Concepts Covered: 4-bit Adder–Subtractor design Signed vs Unsigned addition Overflow and underflow conditions Two’s complement arithmetic Carry and overflow flag interpretation ✅ The Channel link is below 👇👇👇 👉 https://www.youtube.com/channel/UCWAiAV3m08lldG31uEfFuEw?sub_confirmation=1 🟨🟥🟩 Feel Free to ask any questions in the comment section. Contact me at [email protected] for any other help. 🔉📣📢🔊Important Playlists: 🔴🟠🟡🟢 🔻 Podcasts : 👉 https://www.youtube.com/playlist?list=PLgWOIdHQBEz4IhHGuX2f0z4HcCWCrAmPL 🟩 University Admission Tips: 👉https://www.youtube.com/playlist?list=PLgWOIdHQBEz7CV7CJ2BrOhrtKkLXxG019 🔴 FAST University | FAST NUCES Videos 👇👇👇 👉 https://www.youtube.com/playlist?list=PLgWOIdHQBEz5EDT_amckb7FPfDhuL_dGy 🟢 Videos Related to Semester System Playlist 👇👇👇 https://www.youtube.com/playlist?list=PLgWOIdHQBEz6AsP01dmZjZJGS3EJ-lDcM 🔴 Entry Test Preparation Playlist 👇👇👇 👉 https://www.youtube.com/playlist?list=PLgWOIdHQBEz7D1JLLF-VJC2s-r1TuofS1 🟩 Digital Logic Design (DLD) Course Theory Playlist 👇👇👇 👉 https://www.youtube.com/playlist?list=PLgWOIdHQBEz6Ougd453k22nyPDNoNw_tX 🟢 Programming Fundamentals (PF) Full Course Playlist 👇👇👇 👉 https://www.youtube.com/playlist?list=PLgWOIdHQBEz5VmgyZ4IoByOHidsX4lpVF 🔻 Computer Organization & Assembly Language (COAL) Playlist: 👇👇👇 👉 https://www.youtube.com/playlist?list=PLgWOIdHQBEz5t__8v6eZXxKLTV8SGj5kN 🔴 Linear Circuit Analysis (LCA) Playlist 👇👇👇 👉 https://www.youtube.com/playlist?list=PLgWOIdHQBEz5avmCd6zUpuoFWsPVkbcjC 🔶 Digital Logic Design Lab (DLD Lab) Playlist 👇👇👇 👉 https://www.youtube.com/playlist?list=PLgWOIdHQBEz6s7eucAt6Wdkne6LwISPPp 🟡🟢🔵 COLA Lab Playlist: 👇👇👇 👉 https://www.youtube.com/playlist?list=PLgWOIdHQBEz7Ivtv2G71SsiTKen_mvWyq 🔶🔷Signals & Systems With MATLAB 👇👇👇 👉 https://www.youtube.com/playlist?list=PLgWOIdHQBEz40xA173hpV0gDrAyLWAiBi 🔵🔴🟤Probability and Statistics Playlist: 👇👇👇 👉 https://www.youtube.com/playlist?list=PLgWOIdHQBEz6JhLsKI2GLQen3O4rgZSrc 🔺🔻Data Structures and Algorithms Digital Logic Design Playlist 👇👇👇 👉 https://www.youtube.com/playlist?list=PLgWOIdHQBEz6UcbSzBNhAsPasWXRRShP1 ✅ Internet of Things (IoT) Playlist: 👇👇👇 👉 https://www.youtube.com/playlist?list=PLgWOIdHQBEz73MVqrRC1InRLMQFhJZHYD ⭕️ Competitive Exams Math’s Portion Solution : 👇👇👇 👉 https://www.youtube.com/playlist?list=PLgWOIdHQBEz61JrHSLMu_oUo1XpryqbiM 🔷 Feedback Control Systems Lab: 👇👇👇 👉 https://www.youtube.com/playlist?list=PLgWOIdHQBEz5Iwlfxfrr69vDJIKCsOMTS ☑️ ✔️Introductory Videos : 👇👇👇 👉 https://www.youtube.com/playlist?list=PLgWOIdHQBEz6lE1szjK6D7Puk5TC3RTq8 #addersubtracter #4bitadder #adder #subtractor #4bitaddersubtracter #4bitaddersubtractor #fourbitaddersubtractorcircuit #overflow #overflowinaddersubtractor #overflowdetection #overflowforsignednumberinaddersubtractercircuit #binary #signed #unsigned #twoscomplement #overflowflag #xorgate #dld #engineering #computerscience #electronics #fakharabbas