Wireless Transmitter Digital Power Amplifier Concurrent Multi-Mode Signals
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Solution Overview
Problem
Conventional multi-mode/multi-standard radio transmitters require large chip area and high current consumption due to the need for multiple power amplifiers and complex configurations to support dual-mode concurrent transmission.
Innovation Solution
A wireless transmitter design incorporating a digital baseband module and RF transmitter with digital synthesizers and a digital power amplifier, which generates multi-mode modulated signals with frequency offsets to avoid interference, allowing for concurrent transmission of signals like WiFi and Bluetooth using a single chip with reduced size and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple power amplifiers and complex configurations are used to support dual-mode concurrent transmission, then transmission capability is improved, but chip area and current consumption increase
Solution Approach 1:
The patent merges multiple power amplifiers into a single shared power amplifier that can operate in different modes. The digital baseband module generates different frequency offsets for WiFi and Bluetooth signals, allowing one power amplifier to handle both modes by time-division or frequency-division multiplexing, thus reducing chip area while maintaining dual-mode capability
Solution Approach 2:
The single power amplifier is designed with universal functionality to support both WiFi and Bluetooth transmission modes. Through digital signal processing that adjusts frequency offsets and modulation parameters, the same hardware component performs multiple functions that would traditionally require separate dedicated amplifiers for each mode
2Adaptability or versatility
If multiple power amplifiers and complex configurations are used to support dual-mode concurrent transmission, then transmission capability is improved, but current consumption increases
Solution Approach 1:
By combining multiple power amplifiers into one shared component, the patent eliminates the need for separate power supply circuits and control logic for each amplifier, reducing overall current consumption. The single power amplifier operates intermittently or in divided time slots, consuming less energy than multiple amplifiers would require to be continuously powered and controlled
3Adaptability or versatility
If conventional transmitter designs are used, then transmission capability is maintained, but device complexity increases
Solution Approach 1:
The patent consolidates multiple power amplifier instances into a single shared power amplifier, significantly reducing device complexity. The digital baseband module handles mode differentiation through software-controlled frequency offset generation, replacing the need for complex hardware switching and configuration circuits that would be required to manage multiple amplifiers
Solution Approach 2:
The patent replaces mechanical/hardware-based mode selection mechanisms (multiple physical amplifiers with separate control circuits) with digital signal processing techniques. The digital baseband module uses software algorithms to generate appropriate frequency offsets and modulation parameters, substituting complex hardware configurations with simpler digital control
Data Source
AI summary
A wireless transmitter has a digital baseband module and a radio-frequency (RF) transmitter. The digital baseband module generates a multi-mode modulated signal by using a plurality of digital synthesizers. The RF transmitter has a frequency synthesizer and a digital power amplifier (DPA). The frequency synthesizer generates an oscillation signal with an RF carrier frequency. The DPA generates a multi-standard RF signal according to the multi-mode modulated signal and the oscillation signal.