Switchable TX Supply Voltage for Multimode Linearity Control
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Solution Overview
Problem
Multimode communications devices often consume inefficiently high power due to the highest necessary voltage being supplied to circuitry across all modes of operation, despite varying linearity requirements.
Innovation Solution
A voltage generation module that dynamically adjusts the supply voltage to transmitter circuitry based on the operating mode, switching between higher and lower voltage levels as needed, using a switched-mode power supply or separate voltage regulators to optimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the highest necessary voltage level is supplied to circuitry for all modes of operation, then the linearity requirements for all modes are met, but power consumption becomes inefficiently high
Solution Approach 1:
The patent implements dynamic voltage adjustment by switching between different voltage levels (e.g., V1 and V2) based on the operating mode. The voltage supply is no longer static but adapts dynamically to match the requirements of each communication mode, thereby reducing power consumption while maintaining necessary linearity performance.
Solution Approach 2:
The invention changes the voltage parameter supplied to the circuitry depending on the operational phase. During a first phase, a first voltage level is supplied, and during a second phase, a second voltage level is supplied, optimizing the balance between linearity requirements and power consumption for different communication standards.
2Adaptability or versatility
If the highest necessary voltage level is supplied to circuitry for all modes of operation, then adequate voltage for all modes is ensured, but power consumption increases
Solution Approach 1:
The voltage supply system dynamically adapts its output level based on the detected operating mode. The system switches between multiple voltage levels (e.g., higher voltage for modes requiring better linearity, lower voltage for modes with relaxed requirements), ensuring voltage adequacy while minimizing energy waste.
Solution Approach 2:
The invention employs parameter changes by adjusting the voltage level supplied to the circuitry according to the operational phase. This allows the system to maintain adaptability across different communication modes while reducing power waste by avoiding unnecessary high voltage supply when not required.
Data Source
AI summary
Switchable voltage level supplies for circuitry in a multi-mode communications chipset are disclosed. In an embodiment, a first voltage level is supplied to TX circuitry operating in a first mode having a first set of linearity and/or noise requirements. A second voltage level lower than the first voltage level is supplied to TX circuitry operating in a second mode having a second set of linearity and/or noise requirements looser than the first set of requirements. The first mode may be operation according to the GSM standard, and the second mode may be operation according to the W-CDMA standard.