Sampling Circuit Voltage Divider Switch Comparator
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Solution Overview
Problem
The existing sampling circuits in display products have complex circuit structures and low sampling accuracy, leading to unstable sampling processes.
Innovation Solution
A sampling circuit is designed with a voltage divider circuit, switch circuit, and comparator circuit, along with optional voltage regulator and voltage follower circuits, to perform resistance voltage division, control voltage connections, and compare voltages, ensuring stable and accurate sampling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a traditional sampling circuit is used, then the circuit can perform sampling function, but the circuit structure becomes complex and sampling accuracy decreases
Solution Approach 1:
The sampling circuit is divided into three independent functional modules: voltage divider circuit (with multiple resistance voltage divider sub-circuits), switch circuit (with multiple switch sub-circuits), and comparator circuit. Each module performs a specific function, making the overall complex circuit manageable and improvable through individual module optimization.
Solution Approach 2:
The voltage divider circuit pre-calculates and prepares multiple reference voltages at different voltage division output terminals before sampling. The switch circuit pre-positions these reference voltages ready for comparison. This preliminary preparation enables accurate sampling without requiring complex real-time computation circuits.
2Reliability
If a traditional sampling circuit is used, then the circuit can perform sampling function, but the sampling process becomes unstable
Solution Approach 1:
The comparator circuit compares the sampling voltage with reference voltages from the voltage divider circuit and generates feedback signals. This feedback mechanism enables stable sampling by continuously adjusting and comparing voltages, ensuring reliable sampling results even with circuit variations.
Solution Approach 2:
The circuit uses multiple resistance voltage divider sub-circuits with different resistance ratios to generate multiple reference voltages with different parameters. By changing resistance values and ratios, the circuit achieves stable sampling across different voltage ranges without requiring complex stabilization circuits.
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 proposed sampling circuit simplifies the structure, stabilizes the sampling process, and enhances accuracy, enabling effective sampling and analog-to-digital conversion.
Implementation Method 1
the plurality of resistance voltage divider sub-circuits are configured to perform resistance voltage division processing according to voltages at the first input terminal and the second input terminal
Implementation Method 2
the comparator circuit is configured to compare voltages at the third input terminal and the fourth input terminal and provide comparison results to the sampling output terminal
Data Source
AI summary
A sampling circuit, including a voltage divider circuit, a switch circuit and a comparator circuit; wherein first terminals of resistance voltage divider sub-circuits in the voltage divider circuit are electrically connected to voltage division output terminals, respectively, and the resistance voltage divider sub-circuits are configured to perform resistance voltage division processing according to the voltages at first and second input terminals and write divided voltages to the voltage division output terminals, respectively; the voltage division output terminals are electrically connected to the third input terminal through corresponding switch sub-circuits in the switch circuit, respectively, and each switch sub-circuit is configured to control connection/disconnection between a corresponding voltage division output terminal and the third input terminal; the comparator circuit is electrically connected to the sampling output terminal, and is configured to compare voltages at the third and fourth input terminals and provide comparison results to the sampling output terminal.