Voltage and Current Generator Compensation for Fast Settling
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Solution Overview
Problem
Existing source measure units require complex parameter settings and consideration of output resistance, making them difficult to operate effectively for voltage and current generation with short settling times.
Innovation Solution
A voltage and current generator with an operation interface for user input, an output stage, a detector, and a control calculator that performs compensation to cancel low-pass filter effects based on load impedance, allowing for simple setting and improved output response without needing to know the output resistance of the output stage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex parameter settings and output resistance consideration are used, then voltage and current generation accuracy is improved, but ease of operation deteriorates
Solution Approach 1:
The control calculator automatically calculates and applies the compensation operation to cancel low-pass filter effects based on load impedance settings, eliminating the need for users to manually consider output resistance or perform complex parameter adjustments. The system serves itself by autonomously optimizing the control parameters.
Solution Approach 2:
The system dynamically changes control parameters through compensation operations that adjust the control signal based on the detected load impedance. This allows the system to adaptively optimize voltage and current generation accuracy without requiring users to understand or set complex parameters manually.
2Loss of time
If compensation operation to cancel low-pass filter effect is performed, then settling time is reduced, but device complexity increases
Solution Approach 1:
The detector detects the actual load impedance and feeds this information back to the control calculator, which then applies appropriate compensation operations. This feedback mechanism enables the system to automatically reduce settling time by canceling low-pass filter effects without requiring complex manual configuration or additional hardware components.
Solution Approach 2:
The control calculator performs multiple functions including standard voltage/current control, load impedance detection processing, and compensation operation generation. By integrating these functions into a single control unit, the system reduces settling time without proportionally increasing overall device complexity.
3Ease of operation
If simple setting is used, then ease of operation is improved, but output response deteriorates
Solution Approach 1:
The system automatically optimizes its own performance by detecting load impedance and applying compensation operations without requiring users to perform complex settings. This self-service capability maintains ease of operation while achieving fast output response through automated optimization of control parameters.
Solution Approach 2:
The control calculator prepares compensation operations in advance based on detected load impedance, enabling the system to respond quickly to voltage and current generation requests. By pre-calculating compensation parameters based on impedance detection, the system achieves fast output response without burdening the user with complex setup procedures.
Data Source
AI summary
A voltage and current generator (1) includes an operation interface (11) that receives an operation from a user, an output stage (16) that outputs an electrical signal to a load (30), detectors (17, 18) that detect a measured value of the electrical signal outputted by the output stage (16), and a control calculator (15) that controls operation of the output stage (16), based on the deviation between a target value of the electrical signal as set by the user via the operation interface (11) and the measured value of the electrical signal as detected by the detector, so that the measured value of the electrical signal approaches the target value. The control calculator (15) performs control, including a compensation operation to cancel a low-pass filter effect in output resistance of the output stage (16) and the load (30), based on an impedance of the load (30) as set by the user via the operation interface (11).