Fiber Optic IC Power Supply Integration for Low-EMI Voltage Conversion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Communication modules in electronic devices face challenges with discrete power converters that occupy volume and generate unwanted electromagnetic radiation, as they require multiple voltage outputs from a single source voltage, leading to inefficiencies and increased size.
Innovation Solution
Integration of a fiber optic IC with an integrated power supply that includes a filter, active switch, and PWM, where the PWM generates a signal to control the active switch and filter, enabling efficient voltage conversion and reducing electromagnetic radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If discrete power converters are used to convert single source voltage to multiple voltage outputs, then voltage conversion capability is achieved, but device volume increases
Solution Approach 1:
The patent integrates the power converter circuit directly into the semiconductor die, merging the voltage conversion functionality with the existing IC structure. This eliminates the need for separate discrete power converter components, thereby achieving multiple voltage outputs from a single source voltage while minimizing device volume.
Solution Approach 2:
The integrated power converter is designed to provide multiple voltage outputs (e.g., 3.3V, 1.8V, 1.2V) from a single source voltage input, making it a multi-functional component that replaces several discrete converters. This universal approach allows different voltage levels to be generated within the same IC footprint.
2Reliability
If discrete power converters are used to convert voltages, then voltage regulation is achieved, but electromagnetic radiation increases
Solution Approach 1:
By integrating the power converter circuitry within the semiconductor die, the patent reduces the physical separation between power switching elements and sensitive circuitry. This integration minimizes the area over which electromagnetic radiation can propagate, thereby reducing EMI while maintaining voltage regulation functionality.
Solution Approach 2:
The patent employs intermediate filtering structures and grounding schemes within the integrated circuit to mediate and suppress electromagnetic radiation generated during voltage conversion. These intermediary elements act as shields and filters that prevent harmful EMI from reaching other circuit components.
3Adaptability or versatility
If discrete power converters are used in communication modules, then power conversion is achieved, but device complexity increases
Solution Approach 1:
The patent combines the power conversion function with the existing IC fabrication process, merging what would traditionally be separate components into a single integrated device. This reduces the overall device complexity by eliminating the need for separate mounting, wiring, and control circuits that would be required for discrete power converters.
Solution Approach 2:
The integrated power converter is designed to work seamlessly with the existing IC architecture, providing multiple voltage outputs that can serve different functional blocks within the communication module. This universal design approach simplifies the overall system architecture by providing a single source for multiple voltage requirements.
Data Source
AI summary
An example embodiment includes a fiber optic integrated circuit (IC). The fiber optic IC includes an integrated power supply. The integrated power supply includes a filter, an active switch, and a pulse width modulator (“PWM”). The filter is configured to convert a signal to an output signal of the integrated power supply. The active switch is configured to control introduction of the signal to the filter. The PWM is configured to generate a PWM output signal that triggers the active switch.