Capsule Endoscope Receiver Amplifying High-Frequency Signals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Capsule endoscope devices face signal attenuation issues during wireless transmission and reception, particularly in the human body, which affects the quality of image signals and leads to noise interference, especially in the high frequency components.
Innovation Solution
A capsule endoscope image receiver with an analog amplifying unit that includes input impedance and feedback resistors to amplify differential signals, ensuring a higher gain for high frequency components compared to low frequency components, and a signal restoring unit with band pass filters and digital circuits to block noise and restore image information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless signal transmission is used to enable the capsule endoscope to reach anywhere in the digestive organ, then the diagnostic coverage is improved, but signal attenuation occurs during transmission through the human body
Solution Approach 1:
The patent implements a feedback mechanism by using the received differential signal as part of the amplification process. The analog amplifying unit amplifies the differential signal while using feedback from the received signal to maintain stability and compensate for attenuation, ensuring that the amplified signal remains faithful to the original transmitted signal despite losses during wireless transmission through the human body.
Solution Approach 2:
The patent changes the gain parameter of the amplifying unit to compensate for signal attenuation. By adjusting the amplification factor and using frequency-dependent gain control, the system compensates for the frequency-dependent attenuation that occurs during wireless transmission through biological tissues, restoring the signal spectrum to its original characteristics.
2Reliability
If signal amplification is increased to compensate for attenuation, then signal strength is improved, but noise interference is also amplified
Solution Approach 1:
The patent applies local quality by implementing frequency-dependent amplification where different frequency components are amplified by different amounts. The amplifying unit provides higher gain to frequency components that are more attenuated during transmission while providing lower gain to frequencies that are less affected, thereby compensating for attenuation without uniformly amplifying noise across all frequencies.
Solution Approach 2:
The patent introduces an intermediary filtering stage between the amplifying unit and the signal output. The band-pass filter acts as an intermediary that allows only the desired frequency range to pass through while blocking out-of-band noise and interference, thus enabling signal amplification without proportionally amplifying all noise components.
3Measurement precision
If differential signal amplification is applied to maintain signal integrity, then image quality is improved, but circuit complexity increases
Solution Approach 1:
The patent merges multiple functions into a single integrated analog amplifying unit that performs differential signal amplification, impedance matching, and frequency compensation simultaneously. By combining these functions into one circuit block rather than separate stages, the system maintains signal integrity and image quality while minimizing the overall circuit complexity and component count.
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 effectively compensates for signal attenuation, reducing bit errors and improving image quality by maintaining the magnitude of high frequency components similar to low frequency components, thus enhancing the diagnostic capabilities of capsule endoscope systems.
Implementation Method 1
a receiving electrode unit that receives first and second differential signals from a capsule endoscope image transmitter through a human body communication channel
Implementation Method 2
an analog amplifying unit that receives the first and second differential signals from the receiving electrode unit and outputs first and second amplified differential signals
Implementation Method 3
a signal restoring unit that receives the first and second amplified differential signals from the analog amplifying unit and restores image information
Data Source
AI summary
A capsule endoscope image receiver includes a receiving electrode unit that receives first and second differential signals from a capsule endoscope image transmitter through a human body communication channel, an analog amplifying unit that receives the first and second differential signals and outputs first and second amplified differential signals, and a signal restoring unit that receives the first and second amplified differential signals and restores image information. The analog amplifying unit includes a first amplifier that outputs the first amplified differential signal, a second amplifier that outputs the second amplified differential signal, and an input impedance that is connected between a first inverting input terminal of the first amplifier and a second inverting input terminal of the second amplifier and obtains a gain of differential signal amplification in which a high frequency component of the first and second amplified differential signals is greater than a low frequency component.