Multi-Loop Voltage Regulator for Noise-Isolated Power Supply
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Solution Overview
Problem
Electronic devices face challenges in efficiently supplying components with different voltage requirements while minimizing additional components and chip area consumption, particularly in applications like radar devices where noise isolation is crucial, often leading to increased space and cost due to external voltage regulators.
Innovation Solution
Implementing a microcontroller to control a pass device using flexible software-based multi-loop control, combining a delta-sigma ADC/DAC-based control loop for high accuracy and a gain loop for rapid response, allowing for precise voltage regulation and noise isolation without the need for external voltage regulators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If external voltage regulators are used to supply components with different voltage requirements, then voltage regulation accuracy is improved, but device complexity and chip area consumption increase
Solution Approach 1:
The patent combines multiple voltage regulation functions into a single integrated voltage regulator circuit that can output multiple different voltages. Instead of using separate external voltage regulators for each voltage requirement, the invention integrates all voltage regulation functionality into one chip, thereby reducing the number of additional components while maintaining accurate voltage regulation for multiple components.
Solution Approach 2:
The voltage regulator circuit is designed to provide multiple voltage outputs simultaneously, making it a universal power supply solution for different voltage requirements. The circuit can regulate voltage to multiple different levels and supply them to different components, eliminating the need for dedicated external regulators for each voltage level.
2Object-affected harmful factors
If external voltage regulators are used to ensure noise isolation, then noise isolation is improved, but chip area consumption increases
Solution Approach 1:
The patent integrates noise isolation functionality directly into the voltage regulator circuit, combining power supply and noise filtering functions in one compact unit. This eliminates the need for separate external voltage regulators that would occupy additional chip area, while maintaining effective noise isolation through integrated filtering circuits.
3Adaptability or versatility
If multiple separate voltage regulators are used to supply different voltages, then voltage requirements are met, but the number of additional components increases
Solution Approach 1:
The voltage regulator circuit is designed as a multi-functional unit capable of providing multiple different voltage outputs simultaneously. Each output can be independently regulated to meet specific voltage requirements of different components, making the single circuit versatile enough to replace multiple separate regulators.
Solution Approach 2:
The invention merges multiple voltage regulation functions into a single integrated circuit that can handle different voltage requirements through internal switching and regulation mechanisms, thereby satisfying diverse voltage needs without increasing the number of additional components.
Data Source
AI summary
According to an example, an electronic device includes a component, a supply line providing a supply voltage, a transistor with a control input, a linear first control loop, and a non-linear second control loop. The transistor outputs an output voltage to the component depending on a signal applied to the control input. The linear first control loop includes an ADC to convert an analog output voltage level into a digital measurement signal, a controller to generate a digital control signal for the transistor depending on the digital measurement signal, and a DAC to convert the digital control signal into a first analog control signal. The non-linear second control loop is configured to generate a second analog control signal depending on the analog output voltage level. The second analog control signal is superimposed with the first analog control signal and the combined control signals are fed to the control input of the transistor.