Quantizer Readout Circuit With Offset Voltage Self-Calibration
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Solution Overview
Problem
Existing readout circuits face challenges in achieving low noise and high precision due to offset voltage in the reference voltage of quantizers, leading to complex circuit designs, high power consumption, and increased chip costs, especially in applications like CT detectors where manual trimming is required for calibration.
Innovation Solution
A readout circuit with an offset voltage elimination method that includes a correction circuit and a calibration circuit, performing preliminary correction and fine-adjustment calibration to stabilize and eliminate offset voltage, reducing noise and improving precision without the need for manual trimming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual trimming is used to eliminate offset voltage in quantizer reference voltage, then measurement precision is improved, but device complexity and ease of manufacture deteriorate
Solution Approach 1:
The patent applies preliminary action by performing offset voltage elimination through a dedicated correction circuit before the quantization process. The correction circuit pre-processes the reference voltage to remove offset components, ensuring high precision without requiring manual trimming operations during manufacturing or calibration.
Solution Approach 2:
The correction circuit automatically eliminates offset voltage through self-calibration mechanisms. The circuit monitors and corrects its own offset errors without external intervention, making the system self-sufficient and eliminating the need for manual trimming while maintaining high measurement precision.
2Measurement precision
If manual trimming is used to eliminate offset voltage, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The correction circuit performs automatic offset voltage elimination without requiring manual trimming operations. The circuit self-calibrates by monitoring its own output and adjusting internal parameters to eliminate offset errors, thereby improving ease of operation while maintaining high measurement precision.
Solution Approach 2:
The patent implements feedback mechanisms where the correction circuit continuously monitors the reference voltage output and adjusts its correction parameters accordingly. This closed-loop feedback system automatically maintains high precision without requiring manual intervention or complex calibration procedures.
3Measurement precision
If complex circuit design is used to eliminate offset voltage, then measurement precision is improved, but use of energy deteriorates
Solution Approach 1:
The patent segments the offset voltage elimination function into a dedicated correction circuit with specialized components. This segmentation allows the circuit to perform offset correction efficiently with optimized power consumption, as each component is designed for its specific function rather than being part of a general-purpose complex circuit.
Solution Approach 2:
The correction circuit dynamically adjusts its operating parameters to optimize the balance between measurement precision and power consumption. By changing parameters such as correction strength and sampling rates based on operational conditions, the circuit maintains high precision while minimizing energy usage.
Data Source
AI summary
Disclosed are a readout circuit, an offset voltage eliminating method and device, a computer device, and a non-transitory computer-readable storage medium. The readout circuit includes an object quantizer and an offset voltage elimination circuit. The offset voltage elimination circuit includes a correction circuit and a calibration circuit, an input of the correction circuit is connected to an output of the object quantizer, a compensation input of the calibration circuit is connected to an output of the current compensator, and a reference input of the calibration circuit is connected to the output of the object quantizer.