Multi-Band Transmitter Architecture With Low-Voltage Shared PA Driver

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Solution Overview

Problem

Existing transmitters face challenges in reducing power consumption and die area while maintaining performance, particularly in multi-band, multi-mode applications, and often require high voltage supplies that consume significant power.

Innovation Solution

The transmitter architecture replaces the 2.7 Volt power amplifier driver supply with a lower voltage supply, such as 1.5 Volts, and uses passive mixers and a passive low-pass filter to reduce power consumption and die area, allowing for shared driver blocks across communication bands and improved noise performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a 2.7 Volt power amplifier driver supply is used, then the transmitter can maintain performance in multi-band, multi-mode applications, but power consumption increases significantly

Engineering Contradiction:

Improvetransmitter performanceVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent changes the voltage parameter from 2.7V to 1.5V for the power amplifier driver supply, demonstrating that performance can be maintained at lower voltage through architectural modifications including passive mixers and optimized filtering stages

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If active baseband low-pass filters are used, then filtering performance is improved, but power consumption and die area increase

Engineering Contradiction:

Improvefiltering performanceVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent replaces active electronic filtering components with passive filtering structures, eliminating the need for powered amplification stages while maintaining the required frequency selectivity and signal integrity

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Measurement precision

If active baseband low-pass filters are used, then filtering performance is improved, but die area increases

Engineering Contradiction:

Improvefiltering performanceVSAvoiddie area

Core Design Contradiction:

Measurement precisionVSArea of stationary object

Solution Approach 1:

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent designs driver blocks that can be shared across multiple communication bands and modes, reducing the overall die area by eliminating redundant circuitry while maintaining multi-band, multi-mode functionality

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Adaptability or versatility

If high voltage supplies are used, then the transmitter can operate reliably across multiple bands and modes, but device complexity and power consumption increase

Engineering Contradiction:

Improvemulti-band, multi-mode operationVSAvoidvoltage supply complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS8538347B1Low power multi-band, multi-mode transmitter

Publication Date: 2013.09.17 AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE LTD

AI summary

A transmitter includes a power amplifier driver connected with a first transformer and a second transformer. The first transformer is configured for a high-band mode and the second transformer is configured for a low-band mode. The power amplifier driver drives both the first transformer and the second transformer.