Configurable Input Buffer De-emphasis Circuit for Frequency Adaptation
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Solution Overview
Problem
Conventional de-emphasis circuitry in semiconductor devices is often optimized for specific frequency applications, making it difficult or impossible to repurpose for other frequency applications, limiting flexibility and efficiency.
Innovation Solution
A configurable input buffer with a de-emphasis circuit that adjusts gain based on frequency, using a ladder circuit of passgate transistors to control resistance and amplify signals, allowing for adaptable operation across various frequencies while reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If de-emphasis circuitry is optimized for a specific frequency application, then performance at that frequency is improved, but adaptability to other frequency applications deteriorates
Solution Approach 1:
The de-emphasis circuit incorporates adjustable components that allow dynamic reconfiguration of circuit parameters to match different frequency applications. The circuit transitions from a static, fixed-configuration design to a dynamic, adjustable design that can adapt its characteristics based on the operating frequency requirements.
Solution Approach 2:
The invention modifies key circuit parameters such as resistance values, capacitance values, or transistor dimensions to optimize performance for different frequency applications. By providing multiple selectable parameter sets, the circuit can be reconfigured to maintain reliable operation across various frequency ranges without requiring complete redesign.
2Adaptability or versatility
If de-emphasis circuitry is designed for multiple frequency applications, then adaptability is improved, but circuit complexity increases
Solution Approach 1:
The de-emphasis circuit is designed as a universal circuit that can serve multiple frequency applications through a single integrated structure. Rather than implementing separate circuits for each frequency application, the invention uses one circuit with adjustable parameters that can be configured to handle various frequency ranges, thereby reducing overall system complexity.
Solution Approach 2:
The circuit employs modular adjustable elements such as switched resistor networks, selectable capacitor banks, or staged transistor configurations that can be independently controlled. This segmentation allows the circuit to be reconfigured in discrete steps to match different frequency applications, simplifying the control mechanism while maintaining versatility.
Data Source
AI summary
Apparatuses and methods for saving power at an input buffer are described. An example apparatus includes an input buffer comprising an amplifier coupled to a pair of serially coupled inverters, and a de-emphasis circuit coupled to the input buffer in parallel with one of the pair of serially-coupled inverters. The de-emphasis circuit comprising a plurality of transistors coupled in parallel to a resistance. The example apparatus further includes an input buffer control circuit configured to selectively enable one of the plurality of transistors to adjust a gain across the one of the pair of inverters based on a latency setting.