Integrated CDR Processor for Adaptive Locking and Power Control
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Solution Overview
Problem
Conventional clock and data recovery (CDR) circuits have a rigid state machine structure that does not adapt well to changing conditions, and the components are often separated, leading to inefficiencies in power consumption and locking dynamics.
Innovation Solution
A system with a clock and data recovery circuit and a digital control circuit formed on a single substrate, where the digital control circuit, implemented as a processor, adapts the CDR circuit's operation by adjusting voltage levels and locking dynamics based on received data, including data rate, signal integrity, and power consumption, using analog and digital components like bipolar junction transistors and CMOS transistors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If CDR circuit components are formed on separate substrates coupled using printed circuit board, then manufacturing flexibility is improved, but device complexity and power consumption increase
Solution Approach 1:
The patent integrates the CDR circuit and state machine onto a single substrate, eliminating the need for separate substrates and printed circuit board connections. This merging reduces device complexity by consolidating multiple functional blocks into one integrated structure while maintaining manufacturing flexibility through standardized substrate production processes.
2Stability of the object's composition
If rigid state machine structure is used in CDR circuit, then circuit stability is improved, but adaptability to changing circumstances deteriorates
Solution Approach 1:
The patent implements a dynamic state machine structure that can adapt its operation based on changing circumstances. The state machine includes multiple operational modes (e.g., acquisition mode, tracking mode, coarse acquisition mode, fine acquisition mode) that can be dynamically switched between based on signal conditions, allowing the CDR circuit to maintain stability while adapting to varying data rates and signal qualities.
Solution Approach 2:
The state machine changes its operational parameters dynamically based on detected signal conditions. When signal quality or data rate changes, the state machine transitions between different states, adjusting parameters such as loop filter gain, charge pump current, and voltage controlled oscillator tuning range to optimize performance for the current operating conditions.
3Adaptability or versatility
If CDR circuit and state machine are formed separately and coupled using printed circuit board, then design flexibility is improved, but power consumption and locking dynamics efficiency deteriorate
Solution Approach 1:
The patent combines the CDR circuit and state machine into a single integrated structure on one substrate. This integration eliminates power consumption associated with external connections and reduces parasitic effects, thereby improving overall power efficiency while maintaining design flexibility through modular functional blocks that can be independently optimized.
Data Source
AI summary
A system may include a clock and data recovery circuit that includes one or more analog components. The system may also include processing circuitry configured to control the clock and data recovery circuit. The processing circuitry and the clock and data recovery circuit may be formed on a single substrate.