Floating Analog Voltage Signal Addition via Optical Feedback
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Solution Overview
Problem
Adding a floating analog voltage signal over a high reference analog voltage signal is challenging due to increased impedance in low capacitance conduits, resulting in significant common mode noise.
Innovation Solution
A method and system utilizing an optical feedback path to accurately control and add a floating analog voltage signal by converting electrical signals to optical signals, splitting, and using converters to manage the signals, ensuring precise addition and feedback for setting the forward analog voltage signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a low capacitance conduit is used to carry high voltage reference analog voltage signal for safety reasons, then safety is improved, but the impedance of the conduit increases and coupling between signals increases resulting in significant common mode noise
Solution Approach 1:
The patent introduces an optical intermediary (light signal) to transfer the floating analog voltage signal from the high-voltage domain to the low-voltage domain. The optical converter converts the floating analog voltage signal to an optical signal that travels through an optical conduit, avoiding direct electrical coupling. This intermediary optical transmission path eliminates the noise coupling problem while maintaining safety isolation between the high-voltage reference signal and the floating signal.
Solution Approach 2:
The patent replaces the direct electrical connection (mechanical/electrical system) with an optical system. Instead of using electrical conductors to transmit the floating analog voltage signal, the system uses optical converters and optical conduits to transmit the signal as light. This substitution eliminates the impedance and coupling issues inherent in electrical conduits, particularly important when safety requires low capacitance electrical conduits for high-voltage signals.
2Device complexity
If direct electrical connection is used to add floating analog voltage signal to reference analog voltage signal, then device complexity is reduced, but noise coupling increases significantly
Solution Approach 1:
The patent introduces an optical intermediary (light signal) to transfer the floating analog voltage signal from the high-voltage domain to the low-voltage domain. The optical converter converts the floating analog voltage signal to an optical signal that travels through an optical conduit, avoiding direct electrical coupling. This intermediary optical transmission path eliminates the noise coupling problem while maintaining safety isolation between the high-voltage reference signal and the floating signal.
3Measurement precision
If optical feedback path is implemented to accurately control floating analog voltage signal, then signal integrity is improved, but device complexity increases
Solution Approach 1:
The patent implements an optical feedback path that monitors the optical signal and converts it back to electrical form to verify the floating analog voltage signal's accuracy. The feedback converter receives the optical signal and converts it to a feedback voltage that can be compared with the desired signal level. This feedback mechanism enables precise control and verification of the signal conversion process, ensuring signal integrity while maintaining safety isolation through the optical interface.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively reduces noise by accurately controlling the floating analog voltage signal and adding it to the reference signal, improving signal integrity even with high voltage signals exceeding one thousand volts.
Implementation Method 1
converting, by a forward electrical signal to light converter, the forward analog voltage signal to a forward optical analog signal
Implementation Method 2
converting the main part optical analog signal to the floating analog voltage signal, wherein the converting is executed by a forward light to electrical signal converter
Implementation Method 3
converting the backward optical analog signal to a feedback analog voltage; wherein the converting is executed by the backward light to electrical signal converter
Data Source
AI summary
A method and a system for adding a floating analog voltage signal over a reference analog voltage signal. The system and the method may accurately control the value of the floating analog voltage signal—using an optical feedback path, and may directly add the floating analog voltage signal over the reference analog voltage signal.