MEMS Oscillator Linearity Correction for Minimum-Transistor Circuits
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Solution Overview
Problem
Current analog signal processing circuits for physical parameters cannot be miniaturized due to the non-linearity of digital transistors, which limits the size, cost, and power efficiency of sensor modules.
Innovation Solution
A system utilizing a micro electromechanical oscillating signal source to generate a linearly varying oscillating signal, converted to an electrical analog signal, processed by minimum transistors, and corrected for non-linearity errors using a linearity correction circuit, enabling accurate digital output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If analog transistors with long channel lengths are used for analog signal processing, then linearity and measurement precision are improved, but device size and power consumption increase
Solution Approach 1:
The patent changes the operating parameters of minimum transistors by applying feedback control to adjust their effective channel length and transconductance characteristics. This allows minimum transistors to operate in a linear region similar to long-channel analog transistors, achieving both miniaturization and acceptable linearity performance.
Solution Approach 2:
The patent implements feedback circuits that sense the non-linear behavior of minimum transistors and dynamically adjust bias conditions or control signals to compensate for non-linearity. This feedback mechanism enables minimum transistors to maintain linear operation points, resolving the contradiction between size reduction and linearity preservation.
2Use of energy by moving object
If minimum transistors are used for signal processing, then device size and power consumption are reduced, but measurement precision and linearity deteriorate
Solution Approach 1:
The patent implements feedback circuits that sense the non-linear behavior of minimum transistors and dynamically adjust bias conditions or control signals to compensate for non-linearity. This feedback mechanism enables minimum transistors to maintain linear operation points, resolving the contradiction between size reduction and linearity preservation.
Solution Approach 2:
The patent changes the operating parameters of minimum transistors by applying feedback control to adjust their effective channel length and transconductance characteristics. This allows minimum transistors to operate in a linear region similar to long-channel analog transistors, achieving both miniaturization and acceptable linearity performance.
3Measurement precision
If analog circuits are designed with long channel transistors, then linearity is improved, but manufacturing cost and device complexity increase
Solution Approach 1:
The patent changes the operating parameters of minimum transistors through feedback control, allowing standard minimum-size transistors to achieve analog-grade linearity. This eliminates the need for specialized long-channel transistor fabrication processes, reducing manufacturing complexity and cost while maintaining signal processing accuracy.
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
Enables the use of minimum transistors in analog signal sensor modules, reducing power consumption and size while maintaining high accuracy and linearity, making the system suitable for small, low-cost, and reliable sensor applications.
Implementation Method 1
a micro electromechanical oscillating signal source for generating a linearly varying oscillating signal
Implementation Method 2
an analog signal generator coupled to the micro electromechanical oscillating signal source, the analog signal generator being configured to convert the linearly varying oscillating signal to an electrical analog signal
Data Source
AI summary
A system converts an analog input signal to an output signal in a very linear manner using very low chip area and very low power consumption. The system includes a micro electromechanical oscillating signal source for generating a linearly varying oscillating signal, an analog signal generator coupled to the micro electromechanical oscillating signal source, the analog signal generator being configured to convert the linearly varying oscillating signal to an electrical analog signal, a minimum transistor circuit having an input for receiving an analog signal, a switch that selectively couples the electrical analog signal to the input of the minimum transistor circuit, the minimum transistor circuit being configured to process the electrical analog signal and generate digital output values, an error detection circuit coupled to the minimum transistor circuit to detect non-linearity errors in the digital output values, and a linearity correction circuit coupled to the error detection circuit, the linearity correction circuit being configured to compensate for the non-linearity errors detected by the error detection circuit.