Voltage Regulator Interference Spike Compensation Circuit
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Solution Overview
Problem
Voltage regulators face challenges in effectively attenuating interference spikes without increasing costs and board space, as existing methods require additional components or compromise regulating speed.
Innovation Solution
A voltage regulator design incorporating a differentiating circuit and an amplifier with complementary output stages that detect and counteract interference spikes by injecting compensation signals into the output circuit, reducing current draw during transient influences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an increased output capacitor is used to buffer current and maintain supply voltage during interference spikes, then the ability to withstand interference spikes is improved, but both costs and space taken up on the printed circuit board increase
Solution Approach 1:
The invention extracts the interference spike detection and compensation function from the traditional capacitor-based buffering approach. By using a differentiating circuit to detect voltage changes and an amplifier to generate compensation signals, the system eliminates the need for large output capacitors, thereby reducing PCB space while maintaining reliability during interference spikes
Solution Approach 2:
The invention introduces a differentiating circuit and amplifier as intermediary components between the interference source and the output. The differentiating circuit detects voltage changes, and the amplifier generates compensation signals that counteract the interference, serving as mediators that protect the output without requiring large capacitors
2Reliability
If an increased output capacitor is used to buffer current, then the ability to withstand interference spikes is improved, but the regulating speed of the voltage regulator decreases
Solution Approach 1:
The differentiating circuit performs preliminary detection of voltage changes caused by interference spikes before they affect the output. By detecting the rate of change of voltage, the system can generate compensation signals in advance, maintaining fast regulating speed while protecting against interference
Solution Approach 2:
The invention implements a feedback mechanism where the differentiating circuit continuously monitors the output voltage, detects interference spikes through voltage changes, and the amplifier generates compensation signals that are fed back to counteract the interference, maintaining fast regulating response
3Reliability
If an input capacitor or input filter is used to improve sensitivity to interference spikes, then the ability to attenuate interference is improved, but both costs and space taken up on the printed circuit board increase
Solution Approach 1:
The invention extracts the interference filtering function from traditional input capacitors and filters. By using a differentiating circuit that detects voltage changes and an amplifier that generates compensation signals, the system achieves interference attenuation without requiring additional input filtering components, thereby reducing PCB space
Solution Approach 2:
The voltage regulator performs self-service by using its own output circuit and control mechanisms to detect and compensate for interference spikes. The differentiating circuit monitors voltage changes, and the amplifier generates compensation signals that are injected into the output circuit, allowing the system to protect itself without external filtering components
4Speed
If the bias current is increased to improve regulating speed, then the regulating speed is improved, but the current draw increases which is undesirable in most cases
Solution Approach 1:
The invention introduces dynamic response through the differentiating circuit and amplifier, which actively detect and respond to interference spikes in real-time. This dynamic compensation mechanism improves regulating speed during transient events without requiring a continuous increase in bias current, thereby maintaining low power consumption during normal operation
Data Source
AI summary
The invention relates to a voltage regulator having a differentiating circuit and an amplifier, the differentiating circuit being designed to detect a voltage at the voltage regulator connection and to provide it as a differentiated signal at its differentiating output, and the amplifier being designed to inject a compensation signal dependent on the differentiated signal into an input connection of an output circuit of the voltage regulator.