Data Driver Strength Control Circuit for Custom Output Levels
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Solution Overview
Problem
Semiconductor memory devices cannot precisely control the driving strength of data drivers to meet user demands, as they are limited to specific predefined options, such as FULL, HALF, QUARTER, and OCTANT, and cannot adjust to intermediate strengths like three-fourths of the full strength.
Innovation Solution
A driving strength control circuit that utilizes fuse cutting to generate customizable driving signals by combining fuse signal, select signal, and driving control signals, allowing for the generation of driving signals that can be decoded to achieve desired driving strengths not limited to the predefined options.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the driving strength of the data driver is controlled by predefined EMRS signal options (FULL, HALF, QUARTER, OCTANT), then the device meets specification requirements, but the user cannot precisely control the driving strength to match specific user demands
Solution Approach 1:
The patent implements dynamic driving strength control by allowing users to freely adjust the driving strength parameter through a user-defined register, rather than being constrained to fixed predefined options. The control circuit dynamically configures the driving strength based on real-time user input, enabling continuous adjustment across the full range from 1/16 to 1 full strength, thus resolving the contradiction between adaptability and complexity.
Solution Approach 2:
The patent changes the control parameter from discrete predefined EMRS signal levels to a continuous user-definable parameter range. By allowing the driving strength to be set to any value between 1/16 and 1 full strength through register configuration, the system achieves precise control flexibility without requiring complex additional hardware, as the parameter space is efficiently utilized within existing circuit capabilities.
2Adaptability or versatility
If the data driver is designed with full driving strength capability, then it can drive external circuits effectively, but it cannot provide intermediate driving strengths when users require reduced strength for specific applications
Solution Approach 1:
The patent enables dynamic adjustment of driving strength from full capability down to 1/16 strength through user-defined register settings. This dynamic control allows the system to adapt to different signal integrity requirements by selecting appropriate driving strengths, ensuring reliable operation both at full strength for demanding external circuits and at reduced strengths for applications requiring weaker signals, thus resolving the contradiction between adaptability and reliability.
Data Source
AI summary
A driving strength control circuit and a data output circuit for controlling driving strength of a data driver based on a user's demand are provided to make it possible to control the driving strength through a fuse cutting. The driving strength control circuit includes a fuse signal generating unit for generating a fuse signal based on a fuse cutting, a select signal generating unit for generating select signals in response to the fuse signal, a driving control signal generating unit for receiving set-up signals and generate driving control signals in response to the select signals, and a driving signal generating unit for driving signals by decoding the driving control signals.