AC-DC Rectifier Control via Segmented Detection and Logic Circuit
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing rectifier devices using MOS transistors face challenges in precise control and accuracy due to high requirements on comparator precision, leading to potential misjudgment and current leakage, which affects chip consistency and mass production yield.
Innovation Solution
An apparatus comprising a rectifier circuit, detection circuit, and logic circuit with voltage divider modules and comparator modules that compare voltages to accurately control MOS transistor turnoff, even in the event of comparator dysfunction, ensuring precise voltage determination and rectification control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a comparator module with three comparators is used to control MOS transistor switches, then the rectifier circuit can be integrated in a chip to occupy less space, but the voltage values are close which imposes a relatively high requirement on precision of the comparators
Solution Approach 1:
The invention divides the control function into two separate modules: a detection circuit that detects voltage levels and a logic circuit that generates control signals. This segmentation allows the detection circuit to use fewer comparators (reducing chip area) while the logic circuit processes the detected signals to generate accurate control signals, thereby resolving the contradiction between chip area and comparator precision requirements.
2Area of stationary object
If only one MOS transistor is disposed between input ends and output end, then the chip area is reduced, but misjudgment is easily caused which affects a normal function of the switch
Solution Approach 1:
The invention introduces a logic circuit as an intermediary between the detection circuit and the MOS transistor switches. The logic circuit receives detection signals from the detection circuit and generates appropriate control signals to drive the MOS transistor switches. This intermediary ensures reliable switch control by properly interpreting the detection signals and generating the correct control sequences, thereby resolving the contradiction between reduced chip area and switch control reliability.
3Measurement precision
If comparator precision requirements are high, then accurate voltage comparison can be achieved, but current leakage from direct current output end to input ends is easily caused
Solution Approach 1:
The invention segments the control system into a detection circuit that performs voltage comparison and a logic circuit that generates control signals. The detection circuit uses fewer comparators with relaxed precision requirements, reducing the risk of misjudgment and current leakage. The logic circuit then processes these detection signals to generate accurate control signals for the MOS transistor switches, thereby resolving the contradiction between voltage comparison accuracy and current leakage prevention.
4Device complexity
If the rectifier circuit is controlled by a simple switch, then the device complexity is reduced, but chip consistency and mass production yield are affected
Solution Approach 1:
The invention introduces a logic circuit as an intermediary that receives detection signals from the detection circuit and generates precise control signals for the MOS transistor switches. This logic circuit ensures consistent and reliable control across all chips, improving chip consistency and mass production yield. The control circuit complexity is kept manageable by using a systematic logic design that can be easily replicated in mass production, thereby resolving the contradiction between device complexity and chip consistency.
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
The solution enhances the accuracy of MOS transistor control and rectification, reducing errors and improving chip yield by comparing voltages with ground references, thereby improving the reliability and consistency of the conversion process.
Implementation Method 1
a voltage divider module, configured to perform voltage dividing for an input alternating current voltage and a direct current voltage
Implementation Method 2
a first comparator module, configured to compare a voltage of a first alternating current input end with a voltage of a ground and a voltage of a second alternating current input end with a voltage of a ground
Data Source
AI summary
Embodiments provide an apparatus for controlling conversion between an alternating current and a direct current, including a rectifier circuit, a detection circuit, and a logic circuit, where the detection circuit includes a voltage divider module, a first comparator module, and a second comparator module.