Digital RF Transmitter Logic Mixing Power Amplifier
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Solution Overview
Problem
Traditional wireless radio-frequency transmitters have complex circuit structures, large layout areas, high power consumption, and signal quality issues due to analog circuit noise and clock leakage.
Innovation Solution
A digital radio-frequency transmitter is designed with a digital logic mixer, a digital power amplifier, and an antenna, where the digital logic mixer performs logic mixing on baseband data and a radio-frequency local oscillator clock signal to generate radio-frequency data, and the digital power amplifier converts this data into an analog power signal for transmission, reducing circuit layout area and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If traditional analog circuit implementation is used for radio-frequency transmitter modules, then signal processing functionality is achieved, but circuit layout area is large and power consumption is high
Solution Approach 1:
The patent replaces traditional analog circuit implementation with digital logic circuit implementation for the radio-frequency transmitter modules. The digital logic mixer uses digital logic gates (AND gates, multiplexers) to perform mixing operations that were traditionally done with analog components, thereby reducing circuit layout area and simplifying the overall circuit structure while maintaining the required signal processing functionality.
Solution Approach 2:
The patent changes the operating domain from analog to digital by modifying the signal representation parameters. Baseband data and local oscillator signals are processed in the digital domain using logic operations, and the final conversion to analog occurs only at the power amplifier output stage. This parameter change enables compact digital circuit implementation with reduced area and power consumption.
2Reliability
If traditional analog mixing and power amplification is used, then radio-frequency signal generation is achieved, but clock leakage affects signal quality
Solution Approach 1:
The patent replaces the traditional analog mixing stage with a digital logic mixer that performs mixing using digital logic operations. The digital logic mixer processes baseband data and local oscillator signals in the digital domain, generating radio-frequency data without the clock leakage problems associated with analog mixing circuits. This substitution eliminates the harmful clock leakage effect while maintaining reliable radio-frequency signal generation.
3Use of energy by moving object
If digital logic mixer and digital power amplifier are used, then circuit layout area and power consumption are reduced, but digital-to-analog conversion is required
Solution Approach 1:
The patent merges the digital-to-analog conversion function with the power amplifier stage. The digital power amplifier directly converts digital radio-frequency data to analog power signals in a single integrated stage, eliminating the need for separate digital-to-analog converters. This merging reduces the overall device complexity while maintaining the power consumption benefits of digital implementation.
Data Source
AI summary
Disclosed is a digital radio-frequency transmitter, which includes a digital logic mixer, a digital power amplifier and an antenna, wherein an output terminal of the digital logic mixer is connected with an input terminal of the digital power amplifier; an output terminal of the digital power amplifier is connected to the antenna; the digital logic mixer is configured to perform logic mixing on baseband data and a radio-frequency local oscillator clock signal which are input into the digital radio-frequency transmitter to generate radio-frequency data; the digital power amplifier is configured to convert the radio-frequency data into an analog power signal; and the antenna is configured to transmit the analog power signal out. According to the digital radio-frequency transmitter of the present application, the circuit layout area and the circuit operation consumption can be effectively reduced.