Embedded Microcontroller Calibration for Analog IC Circuitry
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Solution Overview
Problem
Existing calibration methods for analog circuits in integrated circuits face challenges due to inflexibility in hard-wired approaches and delayed calibration in programmable logic approaches, which are affected by process variations and require extensive measurement and algorithm updates.
Innovation Solution
An embedded calibration microcontroller within the integrated circuit uses a common bus to communicatively interconnect with analog circuit modules, allowing for flexible calibration through program code execution, reducing the risk of improper calibration and enabling faster initial calibration without pre-configuring the programmable core.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hard-wired calibration circuitry is used, then calibration reliability is improved, but calibration flexibility and adaptability deteriorate
Solution Approach 1:
The patent introduces a microcontroller as an intermediary between the calibration algorithms and the analog circuits. The microcontroller executes calibration routines stored in memory, acting as a flexible mediator that can be reprogrammed with different calibration algorithms while maintaining reliable control over the calibration process through standardized interfaces and procedures
2Adaptability or versatility
If programmable logic is used for calibration, then calibration flexibility is improved, but calibration speed and timing deteriorate
Solution Approach 1:
The patent implements preliminary action by pre-loading calibration algorithms into the microcontroller's memory before the actual calibration process begins. The microcontroller is pre-configured with multiple calibration routines that can be selectively executed, eliminating the need for runtime configuration or reprogramming during the calibration process itself
Solution Approach 2:
The patent applies dynamics by making the calibration system adaptable through software configuration rather than fixed hardware wiring. The microcontroller can dynamically select and execute different calibration algorithms based on the specific analog circuit being calibrated, process variations detected, or user requirements, providing flexibility without sacrificing speed
3Measurement precision
If extensive measurement and algorithm updates are performed, then calibration precision is improved, but calibration complexity and time increase
Solution Approach 1:
The patent implements partial action by providing a menu-driven interface that allows users to select only the specific calibration measurements and algorithms needed for their particular application. The system performs only the necessary subset of available calibration routines rather than requiring all possible measurements, reducing complexity while maintaining precision for the selected calibration tasks
Data Source
AI summary
The present disclosure provides apparatus and methods for the calibration of analog circuitry on an integrated circuit. One embodiment relates to a method of calibrating analog circuitry within an integrated circuit. A microcontroller that is embedded in the integrated circuit is booted up. A reset control signal is sent to reset an analog circuit in the integrated circuit, and a response signal for the analog circuit is monitored by the microcontroller. Based on the response signal, a calibration parameter for the analog circuit is determined, and the analog circuit is 10 configured using the calibration parameter. Other embodiments, aspects and features are also disclosed.