Dynamic Scaling Circuit for Precise Switch Control
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Solution Overview
Problem
Existing power management circuitry in electronic devices, such as voltage converters and charger circuitry, face challenges in reducing cost and complexity due to the need for precise control of switches based on varying loads and power sources, which is not efficiently addressed by current technologies.
Innovation Solution
A dynamic scaling circuit is introduced, comprising a damping control circuit, a sampling circuit, and a controller, which receives a reference voltage and timing signal to generate control signals that adjust the charge on a capacitor, sampling the charge level to provide a damped version of the reference voltage, thereby optimizing switch control and reducing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional switch control circuits are used to precisely control switches based on varying loads and power sources, then control accuracy is maintained, but device complexity and cost increase
Solution Approach 1:
The patent changes the reference voltage parameter dynamically based on duty cycle. Instead of using a fixed reference voltage, the circuit generates a duty-cycle-dependent reference voltage that automatically adapts to varying load conditions. This parameter change eliminates the need for complex control logic while maintaining precise control accuracy.
Solution Approach 2:
The control circuit uses its own duty cycle signal to generate the reference voltage through the dynamic reference voltage generation circuit. The duty cycle information is fed back into the reference voltage generation process, allowing the circuit to self-regulate without external intervention or complex control algorithms.
2Measurement precision
If analog multipliers or feedback amplifiers are used to achieve precise voltage scaling, then scaling accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the essential function of voltage scaling by removing complex components like analog multipliers and feedback amplifiers. Instead, it uses a simplified approach where the reference voltage is directly modulated by the duty cycle signal through a duty cycle dependent reference voltage generation circuit, achieving the same scaling effect with minimal components.
Solution Approach 2:
The patent replaces complex electronic analog processing (mechanical/electronic system) with a simpler voltage modulation approach. The duty cycle signal directly controls the reference voltage level through a simple generation circuit, substituting the need for complex analog multiplication and feedback amplification mechanisms.
Data Source
AI summary
A dynamic scaling circuit includes: a damping control circuit; a sampling circuit; and a controller. The damping control circuit has a first input, a second input, a third input, an output, and a ground terminal. The sampling circuit has a first input, a second input, an output, and a ground terminal. The first input of the sampling circuit is coupled to the output of the damping control circuit. The controller has an input, a first output, a second output, and a third output. The first output of the controller is coupled to the second input of the damping control circuit. The second output of the controller is coupled to the third input of the damping control circuit. The third output of the controller is coupled to the second input of the sampling circuit.