Amplifier Bypass Switching With Phase Compensation for Signal Overflow

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Solution Overview

Problem

Existing amplifier circuit designs in wireless communication devices face issues with signal overflow due to large interference signals, leading to inaccurate demodulation and increased noise factors when using bypass amplifiers, which introduce insertion loss and phase differences that are not suitable for high-delay communication systems.

Innovation Solution

An amplifier circuit structure with a main path and a bypass, controlled by switches and phase compensation circuits, where the first switch is a Single Pole Single Throw (SPST) and the second switch is a Single Pole Double Throw (SPDT, allowing for high signal isolation and reduced insertion loss by selectively routing the signal through either the main path or the bypass, with phase compensation to manage phase differences across various frequencies.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a bypass amplifier is used to reduce gain when large interference signals are present, then signal overflow is prevented, but insertion loss increases and noise factors increase

Engineering Contradiction:

Improvesignal overflow preventionVSAvoidinsertion loss

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The signal path is segmented into a main path and a bypass path, allowing the system to selectively route signals through different paths based on signal conditions. The main path contains the amplifier for normal operation, while the bypass path provides a low-loss alternative for large interference signals.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system dynamically switches between the main path and bypass path based on real-time signal conditions. When large interference signals are detected, the switch transitions to the bypass path to prevent overflow while minimizing insertion loss. Phase compensation is dynamically applied to maintain signal integrity during transitions.

Inventive Principle:

Principle #15Dynamics

2Measurement precision

If a bypass amplifier is used to prevent signal overflow, then demodulation accuracy is improved, but phase differences are introduced that are not suitable for high-delay communication systems

Engineering Contradiction:

Improvedemodulation accuracyVSAvoidphase difference

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

A phase compensation circuit is introduced as an intermediary element to correct the phase differences introduced by the bypass path. This compensation circuit adjusts the phase of signals passing through the bypass to match the phase characteristics of the main path, eliminating timing errors in high-delay communication systems.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If switches are added to enable selective routing between main path and bypass, then signal isolation is improved, but circuit complexity increases

Engineering Contradiction:

Improvesignal isolationVSAvoidcircuit structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The switch component performs multiple functions: it routes signals between main and bypass paths, provides signal isolation when needed, and works in conjunction with phase compensation circuits to maintain signal integrity. This multi-functionality reduces the need for additional dedicated components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Adaptability or versatility

If phase compensation circuits are added to correct phase differences, then communication system compatibility is improved, but power consumption increases

Engineering Contradiction:

Improvecommunication system compatibilityVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

Phase compensation is applied periodically or selectively based on system needs rather than continuously. The phase compensation circuit is activated when the bypass path is used and can be deactivated when the main path is active, reducing overall power consumption while maintaining communication system compatibility.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS11482977B2Amplifier circuit structure and method for controlling circuit

Publication Date: 2022.10.25 GUANGZHOU HUIZHI MICROELECTRONICS

AI summary

An amplifier circuit structure can include an amplifier located in a main path, and a first switch located in a bypass. One end of a second switch is a signal output end of the amplifier circuit structure, and the other end of the second switch is configured to selectively connect to a signal output end of the bypass or a signal output end of the main path. The first and second switches are configured to control their respective operating states when a first instruction is received, such that the main path is connected to the signal input end and the signal output end of the amplifier circuit structure; and to control their respective operating states when a second instruction is received, such that the bypass is connected to the signal input end of the amplifier circuit structure and the signal output end of the amplifier circuit structure.