Dual Loop Linear Voltage Regulator High Frequency Noise Reduction
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Solution Overview
Problem
Conventional voltage regulators are ineffective in removing both high-frequency and low-frequency noise from voltage sources and rely on expensive comparator chips that consume significant power.
Innovation Solution
A linear voltage regulator design incorporating a first circuit to remove frequency components in a first frequency range and a second circuit with inverters to remove components in a second frequency range, utilizing a P-FET transistor to regulate output voltage, thereby minimizing voltage deviation and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional voltage regulators use comparator chips to regulate voltage, then voltage regulation function is achieved, but power consumption increases and cost increases
Solution Approach 1:
The patent replaces traditional comparator chips with a circuit comprising inverters and a P-FET transistor. This substitution eliminates the need for expensive, high-power-consumption comparator chips while achieving the same voltage regulation function through a simpler, lower-power circuit architecture.
Solution Approach 2:
The patent uses inexpensive inverter circuits and a single P-FET transistor instead of expensive comparator chips. This approach reduces component cost and power consumption while maintaining the essential voltage regulation functionality needed for voltage-sensitive loads.
2Reliability
If traditional voltage regulators use comparator chips, then voltage regulation is achieved, but device cost increases
Solution Approach 1:
The patent substitutes expensive comparator chips with inexpensive inverter circuits and a P-FET transistor. This dramatically reduces component cost and simplifies manufacturing while maintaining adequate voltage regulation performance for the intended application.
Solution Approach 2:
The patent replaces complex comparator chip circuits with simpler inverter-based logic circuits. This substitution reduces manufacturing complexity and component cost while achieving the necessary voltage regulation function.
3Device complexity
If voltage regulators use a single circuit, then device complexity is reduced, but ability to remove both high frequency and low frequency noise is lost
Solution Approach 1:
The patent divides the voltage regulation function into multiple specialized circuits: inverter circuits for removing high-frequency noise and a P-FET transistor circuit for removing low-frequency noise. This segmentation allows each circuit to be optimized for its specific frequency range while keeping the overall device relatively simple.
Solution Approach 2:
The patent applies different circuit topologies for different frequency ranges: inverter circuits are used for high-frequency noise removal while a P-FET transistor circuit handles low-frequency noise. This local quality approach ensures optimal noise removal performance across the entire frequency spectrum without requiring a complex universal circuit.
Data Source
AI summary
A linear voltage regulator is provided. The linear voltage regulator includes a first circuit configured to receive the first voltage from a voltage source and to remove frequency components of the first voltage in a first frequency range to obtain an output voltage at a primary output node. The linear voltage regulator further includes a second circuit having first and second inverters electrically coupled to the primary output node of the first circuit. The second circuit is configured to receive the output voltage and to remove frequency components of the output voltage in a second frequency range. The second frequency range is greater than the first frequency range.