Programmable Bandpass Amplifier with Adjustable Corner Frequencies
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional band pass amplifiers have limitations in providing a programmable and adjustable frequency response, which restricts their ability to effectively filter and amplify signals within specific frequency bands, leading to inefficiencies in signal processing.
Innovation Solution
The implementation of band pass amplifiers with programmable low pass filters and common mode rejection amplifiers, allowing for variable corner frequencies and a sliding band pass response, enables efficient filtering and amplification of desired frequency components while rejecting unwanted ones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional band pass amplifiers are used, then the amplifier can provide fixed frequency response, but the amplifier cannot be adjusted to different frequency bands
Solution Approach 1:
The patent implements dynamic adjustability by making the band-pass filter parameters programmable and variable. The corner frequencies of the low-pass filters can be changed through programming, allowing the band-pass response to be dynamically adjusted to different frequency bands. This transforms a static amplifier into an adaptable one without requiring multiple fixed amplifiers.
Solution Approach 2:
The invention changes the parameters of the low-pass filters to achieve band-pass functionality. By programmatically adjusting the corner frequencies of the low-pass filters, the system can selectively pass different frequency bands. This parameter change approach allows a single amplifier structure to serve multiple frequency response requirements.
2Adaptability or versatility
If fixed corner frequencies are used in low pass filters, then the filter design is simple, but the amplifier cannot selectively amplify different frequency bands
Solution Approach 1:
The low-pass filters are designed to serve multiple functions: they act as anti-aliasing filters and simultaneously define the band-pass characteristics when combined with the high-pass filter. By making them programmable, a single filter structure achieves multiple frequency selection functions, reducing the need for separate fixed-frequency filters for different applications.
3Object-affected harmful factors
If band pass amplifiers amplify all frequency components, then the amplification is broad, but unwanted frequency components cannot be rejected
Solution Approach 1:
The frequency spectrum is segmented into desired and unwanted portions using cascaded high-pass and low-pass filters. The high-pass filter blocks low-frequency components while the low-pass filter blocks high-frequency components, creating a segmented band-pass response. This segmentation allows selective amplification of only the desired frequency band, improving signal processing efficiency by preventing unwanted frequencies from being amplified.
Solution Approach 2:
The patent converts the potential harm of unwanted frequency components into a benefit by using the filtering action to define the band-pass characteristics. The same filter structure that could be seen as limiting the bandwidth is actually used to reject harmful frequencies and isolate the desired signal band, turning a limitation into a selective advantage.
Data Source
AI summary
An amplifier has a band pass response. The band pass response may be set by setting corner frequencies of low pass filters.