Voltage Regulator Shunt Feedback Interference Mitigation
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Solution Overview
Problem
Electrical circuits face interference issues due to close proximity of circuit elements, high power usage, and overlapping operating frequencies, which existing methods attempt to mitigate by increasing spacing or adding isolation, but this often results in larger circuit sizes and additional interference.
Innovation Solution
A voltage regulator is designed with high frequency and low frequency inhibiting circuitry, along with shunt feedback circuitry using two current sources and transistors to maintain a constant regulated voltage, preventing interference from digital circuitry and ensuring the voltage remains stable despite varying current draw.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If circuit elements are spaced in close proximity to reduce circuit size, then the overall circuit size is minimized, but electromagnetic interference between circuit elements increases
Solution Approach 1:
The voltage regulator is divided into separate functional blocks: high frequency inhibiting circuitry, low frequency inhibiting circuitry, and shunt feedback circuitry. Each block addresses specific frequency ranges or functions, allowing interference mitigation without increasing overall circuit footprint.
Solution Approach 2:
The voltage regulator acts as an intermediary between the voltage supply and digital circuitry, filtering and regulating the voltage to prevent electromagnetic interference from propagating between circuit elements while maintaining compact integration.
2Object-affected harmful factors
If additional circuitry is added to electrically isolate circuit elements to reduce interference, then electromagnetic interference is reduced, but the overall circuit size increases
Solution Approach 1:
Multiple isolation functions (high frequency filtering, low frequency filtering, and voltage regulation) are merged into a single integrated voltage regulator circuit, eliminating the need for separate isolation components and reducing overall circuit size.
Solution Approach 2:
The voltage regulator performs multiple functions simultaneously: it regulates voltage, filters high frequency noise, filters low frequency noise, and provides isolation between circuit elements, replacing what would traditionally require multiple separate components.
3Device complexity
If high frequency energy is allowed to transmit into the voltage supply, then the voltage regulator remains simple, but electromagnetic interference affects other circuitry
Solution Approach 1:
The voltage regulator is segmented into distinct frequency filtering stages (high frequency and low frequency) along with the shunt feedback circuitry, allowing targeted interference suppression without requiring a complete redesign of the entire regulator.
4Device complexity
If low frequency energy is allowed to transmit into the voltage supply, then the voltage regulator remains simple, but electromagnetic interference affects other circuitry
Solution Approach 1:
The voltage regulator is segmented into distinct frequency filtering stages (high frequency and low frequency) along with the shunt feedback circuitry, allowing targeted interference suppression without requiring a complete redesign of the entire regulator.
5Device complexity
If the regulated voltage is allowed to vary with current draw, then the voltage regulator remains simple, but operational reliability decreases
Solution Approach 1:
The shunt feedback circuitry continuously monitors the regulated voltage and adjusts the output accordingly to maintain a constant voltage level despite variations in current draw, ensuring stable operation and high reliability.
Data Source
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AI summary
A voltage regulator configured to receive a supply voltage from a voltage supply and provide a regulated voltage to digital circuitry is provided. The voltage regulator comprises first circuitry configured to inhibit high frequency energy generated by the digital circuitry from transmitting into the voltage supply, second circuitry configured to inhibit low frequency energy generated by the digital circuitry from transmitting into the voltage supply, and third circuitry configured to maintain the regulated voltage at a substantially constant value in response to a current drawn by the digital circuitry.