Dual-Mode RF Power Circuit for 5G-NR Peak Power Tracking
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Solution Overview
Problem
Current RF power amplifier circuits face challenges in efficiently amplifying RF signals for 5G-NR communication systems, particularly in maintaining high power levels and bandwidth while coexisting with 3G and 4G standards, due to the need for concurrent modulation of voltage and current to achieve the required power class 2 peak power in 5G-NR bands.
Innovation Solution
A multi-mode mobile power management circuit with dual-mode amplifier circuits and tracker circuitries, including charge pump circuitries, that dynamically control currents and voltages to amplify RF signals to higher power levels, supporting high-power high-bandwidth mode for 5G-NR transmission, and adjusting for lower power modes in 4G and LTE bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single amplifier circuit is used for both 4G and 5G-NR bands, then device complexity is reduced, but the amplifier cannot achieve the required high power levels for 5G-NR transmission
Solution Approach 1:
The amplifier circuit is segmented into two separate amplifier circuits: a first amplifier circuit for 4G/LTE bands and a second amplifier circuit for 5G-NR bands. Each amplifier circuit is independently configured and controlled, allowing the second amplifier circuit to be optimized for high power 5G-NR transmission while the first handles lower power 4G/LTE bands, thus resolving the contradiction between device complexity and power output capability.
Solution Approach 2:
The system dynamically switches between amplifier circuits based on the operating band. A control circuit determines whether to activate the first amplifier circuit for 4G/LTE or the second amplifier circuit for 5G-NR based on reception signals, enabling the system to adapt its power output capability to the specific transmission requirements of each band.
2Power
If concurrent modulation of voltage and current is implemented for 5G-NR, then power class 2 peak power is achieved, but device complexity increases
Solution Approach 1:
The control functionality is segmented into separate control circuits for each amplifier circuit. The first control circuit manages voltage and current modulation for the first amplifier circuit (4G/LTE), while the second control circuit handles concurrent modulation for the second amplifier circuit (5G-NR). This segmentation allows complex concurrent modulation to be implemented only where needed for 5G-NR without unnecessarily complicating the 4G/LTE path.
Solution Approach 2:
Concurrent modulation of voltage and current is applied locally only to the second amplifier circuit for 5G-NR bands where high power is required, while the first amplifier circuit for 4G/LTE uses simpler modulation. This localized application of complex modulation techniques achieves power class 2 peak power for 5G-NR without unnecessarily increasing device complexity across the entire system.
3Power
If separate amplifier circuits are used for 4G and 5G-NR bands, then high power levels for 5G-NR are achieved, but device complexity increases
Solution Approach 1:
Both amplifier circuits share common input and output interfaces, and the control circuit universally manages both circuits based on band requirements. This multi-functional architecture allows the system to handle both 4G/LTE and 5G-NR transmissions through a unified framework, reducing the overall device complexity compared to having completely separate independent systems while still achieving high power levels for 5G-NR.
Data Source
AI summary
A multi-mode mobile power management circuit is provided. The multi-mode mobile power management circuit includes a dual-mode amplifier circuit(s) configured to amplify a radio frequency (RF) signal for transmission in a defined RF band(s), such as a long-term evolution (LTE) band(s) or a fifth-generation new radio (5G-NR) band(s). The multi-mode mobile power management circuit includes a pair of tracker circuitries coupled to the dual-mode amplifier circuit. Each tracker circuitry includes a charge pump circuitry configured to generate a voltage and a current. When the dual-mode amplifier circuit amplifies the RF signal for transmission in the 5G-NR band(s), both charge pump circuitries are controlled to provide two currents to the dual-mode amplifier circuit. As a result, the dual-mode amplifier circuit is able to amplify the RF signal to a higher power corresponding to a sum of the two currents for transmission in the 5G-NR band(s).