Variable Receiver Gain Stage for Isolation Barrier Signal Integrity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing isolation technologies face challenges in reliably communicating information across isolation barriers with selectable power consumption and immunity to common mode transients, as they are susceptible to interference and power consumption variations.
Innovation Solution
A receiver signal path with a programmable flat gain stage and a peaking gain stage, configured as a variable peaking gain stage, provides amplified differential signals with selectable power consumption and enhanced common-mode transient immunity by adjusting gain settings based on power consumption configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed gain stage is used in the receiver signal path, then the circuit complexity is reduced, but the power consumption cannot be adjusted to match different application requirements
Solution Approach 1:
The patent implements a variable gain amplifier with multiple selectable gain stages (e.g., 20dB, 40dB, 60dB) that can be dynamically configured based on power consumption requirements. This allows the receiver to adapt its sensitivity and power usage to match different application scenarios, resolving the contradiction between adaptability and complexity by providing a controlled, multi-level adjustment mechanism rather than a completely flexible system
Solution Approach 2:
The patent changes the gain parameter of the amplifier stage to enable different power consumption modes. By adjusting the gain setting (e.g., selecting between 20dB, 40dB, or 60dB), the system can optimize power consumption while maintaining adequate signal reception capability, thus achieving adaptability without excessive complexity
2Reliability
If the gain is increased to improve signal reception, then the signal-to-noise ratio improves, but the power consumption increases
Solution Approach 1:
The patent employs a variable gain amplifier that can dynamically adjust its amplification level based on signal conditions and power requirements. By selecting appropriate gain stages, the system maintains reliable signal reception only when necessary, reducing power consumption during operations with adequate signal strength while ensuring reliability when signal conditions deteriorate
Solution Approach 2:
The patent adjusts the gain parameter to optimize the balance between signal reception reliability and power consumption. By changing the gain setting based on application requirements, the system achieves adequate signal-to-noise ratio only when needed, thereby reducing overall power consumption while maintaining necessary reception reliability
3Reliability
If a peaking gain stage with high gain at carrier frequency is used, then common mode transient immunity is improved, but the bandwidth is reduced
Solution Approach 1:
The patent implements a peaking gain stage that provides enhanced gain specifically at the carrier frequency while maintaining adequate performance across a broader bandwidth. This localized enhancement at the critical carrier frequency improves common mode transient immunity without unnecessarily restricting the overall signal bandwidth, as other frequency regions retain sufficient gain for proper signal reception
Data Source
AI summary
A receiver signal path includes a programmable flat gain stage configured to provide an amplified differential pair of signals based on a first frequency response having a selectable flat gain and a differential input pair of signals received on an input differential pair of nodes. The receiver signal path includes a peaking gain stage configured to generate a second amplified differential pair of signals based on the amplified differential pair of signals according to a second frequency response including a first peak gain at or near a carrier frequency in a first pass band. The first peak gain occurs just prior to a first cutoff frequency of the peaking gain stage. The programmable flat gain stage and the peaking gain stage are configured as a variable peaking gain stage. The selectable flat gain is selectively programmed based on a predetermined power consumption of a receiver path.