Monolithic III-N Voltage Regulator and RF Power Amplifier for Envelope Tracking
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Solution Overview
Problem
RF power amplifiers in mobile devices and base stations suffer from inefficiencies, leading to depleted battery life and excessive power consumption due to inefficiencies in power transfer and signal processing, particularly in high peak-to-average power transmission ratios in 4G/LTE and 5G communication formats.
Innovation Solution
A monolithic integrated circuit semiconductor structure is developed, incorporating III-V material portions, such as gallium nitride, for voltage regulators and RF power amplifiers, integrated with CMOS logic on a single substrate, enabling envelope tracking systems that adjust voltage to match RF signal power needs, thereby enhancing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional RF power amplifiers are used in mobile devices and base stations, then signal transmission is achieved, but power efficiency deteriorates leading to depleted battery life and excessive power consumption
Solution Approach 1:
The patent combines the voltage regulator and RF power amplifier into a single monolithic integrated circuit device. This merging allows the voltage regulator to directly control the supply voltage to the power amplifier, enabling precise voltage tracking with the RF signal envelope and eliminating the need for separate external voltage regulator circuits, thereby improving power efficiency and reducing power loss.
Solution Approach 2:
The patent implements dynamic voltage regulation where the voltage regulator continuously adjusts the supply voltage to the power amplifier in real-time to match the envelope of the RF signal. This dynamic operation allows the amplifier to operate at optimal efficiency points across varying signal conditions, significantly improving overall power efficiency compared to fixed voltage operation.
2Loss of energy
If envelope tracking systems are implemented to improve power efficiency, then power consumption is reduced, but device complexity increases due to integration of voltage regulator and RF power amplifier
Solution Approach 1:
The patent merges the voltage regulator and RF power amplifier into a single monolithic integrated circuit device. This merging allows the voltage regulator to directly control the supply voltage to the power amplifier, enabling precise voltage tracking with the RF signal envelope and eliminating the need for separate external voltage regulator circuits, thereby improving power efficiency and reducing power loss.
3Use of energy by moving object
If III-N material portions are used for voltage regulator and RF power amplifier, then efficiency is improved, but manufacturing complexity increases compared to traditional CMOS only integration
Solution Approach 1:
The patent employs a heterostructure combining III-N semiconductor materials (such as gallium nitride) with CMOS technology on a single substrate. The III-N material portion provides high-efficiency RF power amplification and voltage regulation, while the CMOS portion handles control logic and signal processing. This composite material approach enables superior efficiency performance while managing manufacturing complexity through established heterointegration techniques.
Data Source
AI summary
Techniques are disclosed for forming monolithic integrated circuit semiconductor structures that include a III-V portion implemented with III-N semiconductor materials, such as gallium nitride, indium nitride, aluminum nitride, and mixtures thereof. The disclosed semiconductor structures may further include a CMOS portion implemented with semiconductor materials selected from group IV of the periodic table, such as silicon, germanium, and/or silicon germanium (SiGe). The disclosed techniques can be used to form highly-efficient envelope tracking devices that include a voltage regulator and a radio frequency (RF) power amplifier that may both be located on the III-N portion of the semiconductor structure. Either of the CMOS or III-N portions can be native to the underlying substrate to some degree. The techniques can be used, for example, for system-on-chip integration of a III-N voltage regulator and RF power amplifier along with column IV CMOS devices on a single substrate.