Recording of my CODD module kuppy session, covering from basics to combinational logic, is available on YouTube.
Analog and Digital
Analog devices and systems have continuous time-varying signals.
Digital devices and systems are an abstracted version of analog systems with finitely many discrete states. 2 states are commonly used: HIGH (1) and LOW (0).
Comparison
Digital offers more advantages over analog:
- Reproducibility of results
- Ease of Design
- Flexibility
- Programmability
- Speed
- More immune to noise and interference
Milestones in Computer Development
Difference Engine
- Inventor
Charles Babbage - Purpose
Mechanical computation of polynomial functions. - Features:
- Automated calculation and printing of mathematical tables.
- First automatic mechanical calculator.
- Incomplete due to funding and complexity.
- Significance
Foundation for automated mechanical computation.
Analytical Engine
- Inventor
Charles Babbage - Purpose
General-purpose, programmable computing machine. - Features:
- Introduced the concepts of the Arithmetic Logic Unit (ALU), memory, punch cards, and conditional branching.
- First conceptual design of a modern computer.
- Ada Lovelace wrote the first computer program for it.
- Significance
Introduced programmable computing concepts.
Von Neumann Architecture (1946)
- Authors
Arthur Burks, Herman Goldstein, John von Neumann - Purpose
Design principles for electronic digital computers. - Features:
- The stored-program concept, where memory holds both instructions and data.
- Made up of the Control Unit, ALU, memory, input, and output.
- Significance
Standardized modern computer architecture.
X86 Architecture (1978–Present)
- Creator
Intel (Introduced with the Intel 8086 processor) - Purpose
Complex Instruction Set Computing (CISC) architecture for general computing. - Features:
- Backward compatibility across generations.
- Evolution to x86-64 for 64-bit processing.
- Dominant in desktop and server markets.
- Significance
Enduring and widely-used computing architecture.
Transistor (1947)
- Inventors
John Bardeen, Walter Brattain, William Shockley - Purpose
Act as a switch or amplifier in circuits. - Features:
- Replaced bulky vacuum tubes.
- Enabled smaller, faster, more efficient computers.
- Low power consumption, high reliability.
- Significance
Fundamental component of modern digital circuits.
Integrated Circuit (1958)
- Inventors
Jack Kilby, Robert Noyce - Purpose
Integrate multiple electronic components on a single chip. - Features:
- Miniaturization, increased speed, reduced cost.
- Essential for microprocessors and modern electronics.
- Significance
Enabled complex circuits on small chips.
Microprocessor (1971)
- Inventor
Intel (Intel 4004 by Ted Hoff, Federico Faggin, Stan Mazor) - Purpose
First single-chip CPU. - Features:
- Entire processing unit on one chip.
- Facilitated personal computers and embedded systems.
- Significance
Sparked the microcomputer revolution.
Cerebras Wafer-Scale Engine (2019)
- Creator
Cerebras Systems - Purpose
AI accelerator chip for deep learning. - Features:
- The largest chip built to date, at 46,225 mm² with 2.6 trillion transistors.
- 850,000 cores optimized for AI tasks.
- Reduces latency by integrating on a single wafer.
- Significance
Advanced AI processing capabilities.