Isolation Channel Demodulation for Dual Gate and Configuration Signals
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Solution Overview
Problem
Existing isolation communication systems require two separate channels to transmit gate and configuration information, which consumes additional power and silicon area, and often faces package limitations, making it inefficient for dynamic control of high-power transistors.
Innovation Solution
A method and apparatus that utilize a single isolation communication channel to simultaneously transmit gate and configuration information using modified on-off keying (OOK) modulation, allowing for dynamic drive strength control of high-power transistors by encoding configuration information into the modulation scheme, enabling efficient communication across the isolation barrier without the need for a second channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two separate isolation communication channels are used to transmit gate and configuration information, then communication reliability is improved, but power consumption and silicon area increase
Solution Approach 1:
The patent combines gate information and configuration information transmission into a single isolation communication channel. The modulator encodes both types of information simultaneously by modulating the isolation channel with composite signals, eliminating the need for separate channels and reducing overall power consumption while maintaining communication reliability
Solution Approach 2:
The single isolation communication channel is designed to perform multiple functions: transmitting both gate information and configuration information. The modulator and demodulator are configured to handle both data types through the same physical channel, making the system more efficient by utilizing one channel for multiple communication purposes
2Reliability
If two separate isolation communication channels are used to transmit gate and configuration information, then communication reliability is improved, but silicon area increases
Solution Approach 1:
The patent merges the transmission of gate information and configuration information into a single isolation communication channel. The modulator integrates both information streams and the demodulator extracts them separately, reducing the silicon area required for isolation communication components while maintaining the reliability needed for high-power transistor control
Solution Approach 2:
The single isolation communication channel performs dual functions by simultaneously carrying both gate and configuration information. This multi-functional approach reduces the total silicon area occupied by isolation communication circuitry compared to implementing two separate dedicated channels
3Productivity
If modified OOK modulation is used to encode configuration information, then communication efficiency is improved, but signal detection complexity increases
Solution Approach 1:
The patent uses modified on-off keying modulation where configuration information is encoded by changing the presence or absence of carrier waves during specific time periods. This parameter-based encoding (using time and frequency characteristics) improves communication efficiency while the demodulator detects these changes through envelope detection and frequency analysis, managing the detection complexity through systematic signal processing
Data Source
AI summary
An integrated circuit includes a demodulator to demodulate a signal simultaneously transmitted over an isolation communication channel and obtain gate information and configuration information. The demodulator includes a gate demodulation path and a configuration demodulation path. The received signal oscillates at a first frequency to represent a first state, oscillates at different frequencies to represent a seconds state, oscillates at a third frequency (or third and fourth frequencies), which are lower than the first frequency, to represent a third state, and the received signal is steady state to represent a fourth state. The gate demodulation path detects the first and second states. The configuration demodulation path includes first and second sub-demodulation paths. An envelope detector in the first sub-demodulation path detects the second state and the second sub-demodulation path detects the third state. The configuration demodulation paths uses an output of the gate demodulation path.