Receiver Front-End Gain Compensation for Low-Power Digital Isolation
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Solution Overview
Problem
Existing isolation technologies face challenges in reliably communicating information across an isolation barrier while maintaining selectable power consumption and immunity to common mode transients.
Innovation Solution
A receiver front-end circuit is configured according to a selected power consumption configuration, with a programmable flat gain stage adjusting the quiescent current to compensate for gain loss, ensuring reliable communication across the isolation barrier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the receiver front-end circuit operates in reduced power consumption configuration, then power consumption is reduced, but gain is lost
Solution Approach 1:
The receiver front-end circuit employs dynamic configuration capability, allowing it to switch between different power consumption modes (reduced and normal) based on operational requirements. This dynamic adaptability enables the system to optimize power usage while maintaining necessary performance levels through programmable control of the front-end circuit characteristics.
Solution Approach 2:
The invention changes the operational parameters of the receiver front-end circuit by implementing programmable resistance values and adjustable gain settings. By modifying these parameters dynamically, the circuit can operate in reduced power consumption mode with lower gain when appropriate, or switch to normal mode with higher gain when signal integrity is critical, thus resolving the contradiction between power savings and gain maintenance.
2Use of energy by moving object
If the quiescent current is reduced for lower power consumption, then power consumption decreases, but communication reliability deteriorates
Solution Approach 1:
The receiver implements dynamic adjustment of quiescent current based on communication conditions. The circuit can operate at reduced quiescent current levels to save power during stable communication periods, but can quickly switch to higher current modes when signal quality degrades or during initialization, maintaining communication reliability while optimizing power consumption over time.
Solution Approach 2:
The invention employs programmable resistance elements that allow adjustment of the quiescent current parameter. By changing this parameter dynamically based on communication requirements, the system achieves lower average power consumption while maintaining the ability to restore full current levels when communication reliability is compromised, thus resolving the contradiction between power savings and reliability.
3Adaptability or versatility
If programmable resistance is used to adjust gain, then gain control flexibility is improved, but device complexity increases
Solution Approach 1:
The receiver front-end circuit utilizes programmable resistance elements that can be controlled through digital interfaces. This allows precise adjustment of gain parameters through software control, providing flexible adaptability without requiring complex hardware switching networks. The programmable approach simplifies the overall device architecture by replacing multiple discrete components with digitally controllable elements.
Data Source
AI summary
In at least one embodiment, a method for operating a receiver includes configuring a receiver front-end circuit of the receiver according to a selected power consumption configuration. The method includes adjusting a quiescent current of a programmable flat gain stage coupled to the receiver front-end circuit according to the selected power consumption configuration to compensate for any gain loss of the receiver front-end circuit in the selected power consumption configuration. The selected power consumption configuration may be a reduced power consumption configuration and the programmable flat gain stage may be configured to at least partially compensate for the gain loss of the receiver front-end circuit in the reduced power consumption configuration.