8. Digital CMOS Logic Design - Part 2: Introduction to CMOS
CMOS digital logic families encompass various types of logic gates and circuits built using CMOS technology. Key families such as static CMOS, dynamic CMOS, transmission gate logic, and pass-transistor logic each have distinct characteristics regarding power consumption, speed, application suitability, and design complexity. Consideration of trade-offs between these factors is crucial when selecting a CMOS logic family for specific digital applications.
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What we have learnt
- CMOS digital logic families include static, dynamic, transmission gate, and pass-transistor logic.
- Each logic family presents unique trade-offs concerning power consumption, speed, and complexity.
- Design considerations are vital when choosing the right CMOS logic family for application-specific requirements.
Key Concepts
- -- Static CMOS Logic
- A widely used form of CMOS logic that maintains its logic states indefinitely without the need for a clock signal.
- -- Dynamic CMOS Logic
- A logic family where output states are determined by stored charge and require a clock signal for operation.
- -- CMOS Transmission Gate Logic
- A logic family utilizing NMOS and PMOS transistors that allows signals to pass through with minimal loss.
- -- PassTransistor Logic (PTL)
- A logic family based on passing logic levels through NMOS or PMOS transistors with lower circuit complexity.
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