A process variation auto-tuning circuit for voltage reference source
By designing an automatic adjustment circuit in integrated circuits, and using different resistors to detect and adjust process deviations, the problem of decreased accuracy of voltage reference sources in integrated circuits is solved, achieving high-precision output and cost reduction.
CN117434995BActive Publication Date: 2025-12-09UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information
- Application Number
- CN202311425357.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-31
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2043-10-31
AI Technical Summary
Technical Problem
Deviations in integrated circuit manufacturing processes lead to a decrease in the accuracy of voltage reference sources, and traditional adjustment methods increase chip costs and debugging complexity.
Method used
Design an automatic trimming circuit that does not require external trimming pins on the chip. Utilize different types of resistors to detect process deviations and perform automatic trimming, including current source generation, process deviation detection, decoding, and trimming circuitry.
Benefits of technology
It achieves high-precision reference voltage output, reduces chip production and testing costs, and simplifies the debugging process.
✦ Generated by Eureka AI based on patent content.
Abstract
The application belongs to the technical field of integrated circuits, and particularly relates to a process deviation automatic trimming circuit for a voltage reference source, which specifically comprises a voltage reference, a current source generation circuit, a process deviation detection circuit, a decoder and a trimming circuit, and is characterized in that the process deviation detection circuit is composed of several types of different resistors under the same process library, can accurately detect the process deviation amount, can accurately trim the reference voltage source, and realizes high-precision output of the reference voltage source. The process deviation automatic trimming circuit for the voltage reference source has simple structure, small layout area, and no external trimming pin of the chip, can automatically detect the process deviation amount, and automatically trims the reference voltage source according to the process deviation. The process deviation automatic trimming circuit for the voltage reference source can greatly reduce the chip production cost and the chip testing cost in the later stage.
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