Tx Power Compensation Using Battery Voltage Feedback
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Solution Overview
Problem
Existing methods for compensating for the power of a transmission signal in electronic devices are costly and space-constrained, and can lead to unreliable measurements due to increased circuit length.
Innovation Solution
An electronic device that detects transmission events and requests voltage level information from a battery, using this information to compensate for the transmission power level of a Tx signal, thereby eliminating the need for additional circuitry to measure power supply voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional circuitry is added to measure power supply voltages for transmission signal compensation, then measurement precision is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The battery management system, which already exists for battery management functions, is made to serve an additional function of providing voltage level information for transmission signal compensation. This eliminates the need for separate measurement circuitry while utilizing existing system resources.
Solution Approach 2:
The battery management system is designed to perform multiple functions: both battery management and transmission power compensation. By making the system universal, separate dedicated circuitry for voltage measurement is eliminated, reducing overall device complexity.
2Measurement precision
If additional circuitry is added to measure power supply voltages, then measurement precision is improved, but manufacturing cost increases
Solution Approach 1:
The existing battery management system provides voltage level information for transmission compensation, eliminating the need for separate measurement circuits and reducing manufacturing costs while maintaining measurement precision.
Solution Approach 2:
The battery management system is designed to perform multiple functions including transmission power compensation, reducing the total component count and manufacturing complexity while maintaining measurement accuracy.
3Measurement precision
If circuit length is increased to accommodate measurement circuitry, then measurement capability is improved, but reliability deteriorates
Solution Approach 1:
The battery management system, which is already positioned near the battery, provides voltage information directly without requiring long measurement circuits. This eliminates reliability issues associated with extended circuit traces while maintaining measurement capability.
Data Source
AI summary
An electronic device comprises: a battery; a communication module including a first processor; and a second processor electrically connected to the battery and the communication module. The first processor detects a transmission event of a Tx signal; requests voltage level information about the battery from the second processor in response to detecting the transmission event of the Tx signal; and receives the voltage level information about the battery from the second processor in response to requesting the voltage level information about the battery. The communication module compensates for the transmission power level of the Tx signal on the basis of the voltage level information about the battery received by the first processor.