Addressing Circuit for Conductor Arrays with Voltage Buffer Equalization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing addressing circuits for conductor arrays face challenges in accurately measuring electrical characteristics without introducing crosstalk and require a large component count, which is undesirable, especially in medical applications.
Innovation Solution
The proposed addressing circuit includes a switching circuit with voltage buffers to equalize voltages between selected and unselected column conductors, a transimpedance amplifier, and row buffers to control voltages, preventing current flow and allowing for accurate measurement of electrical characteristics without the need for transimpedance amplifiers on every column, thus reducing component count and crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If transimpedance amplifiers are placed on every column conductor to measure electrical characteristics, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent divides the conductor array into selected and unselected groups, applying different circuit configurations to each segment. Only the selected column conductor connects to the transimpedance amplifier for measurement, while unselected column conductors connect to voltage buffers that equalize their voltages, preventing crosstalk. This segmentation allows precise measurement at the selected intersection without requiring amplifiers on all columns.
Solution Approach 2:
The patent applies different electrical characteristics to different parts of the system: the selected column conductor has high impedance connection to the transimpedance amplifier for sensitive measurement, while unselected column conductors have voltage equalization applied locally through buffers. This local differentiation enables precise measurement at the measurement point without compromising the entire system.
2Object-generated harmful factors
If voltage equalization is applied to unselected column conductors using buffers, then crosstalk is reduced, but component count increases
Solution Approach 1:
The patent introduces voltage buffers as intermediary components between the unselected column conductors and ground. These buffers act as mediators that equalize the voltages of unselected column conductors to a common potential, preventing current leakage and crosstalk without requiring direct connection to ground or other complex isolation circuits.
Solution Approach 2:
The patent applies voltage equalization to unselected column conductors by connecting them through buffers to a common voltage potential. This creates equipotential conditions for unselected columns, eliminating voltage differences that would cause crosstalk or current leakage between adjacent columns during measurement.
3Measurement precision
If row buffers control voltage in each row conductor, then measurement accuracy is improved, but manufacturing cost increases
Solution Approach 1:
The patent applies preliminary voltage control to row conductors through row buffers before the actual measurement process. The row buffers pre-establish the correct voltage levels and impedance conditions for each row, ensuring that when the selected row intersects with the selected column, the measurement conditions are already optimized for accuracy.
Data Source
AI summary
Embodiments generally relate to an addressing circuit for a conductor array comprising intersecting row and column conductors. The addressing circuit comprises a switching circuit configured to selectively address an intersection between a selected row conductor and a selected column conductor for connection to a measuring circuit; and at least one voltage buffer selectively connectable to un-selected column conductors on opposite sides of and adjacent to the selected column conductor. The at least one voltage buffer is configured to equalise voltages between the un-selected column conductors and the selected column conductor.