Single-Die Inductor Circuit Layout for Multi-Coil Space Saving

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Solution Overview

Problem

Conventional wireless transceivers require multiple circuit areas for different coils, leading to increased circuit space usage.

Innovation Solution

An inductor circuit with a receiver, transmitter, and antenna inductive circuits integrated on a single chip die, where the transmitter and antenna circuits are positioned inside a ring surrounded by the receiver circuit, optimizing circuit area usage and enabling better signal matching and balancing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple circuit areas are used for different coils in conventional transformer circuits, then circuit functionality is achieved, but circuit space usage increases

Engineering Contradiction:

Improvecircuit functionalityVSAvoidcircuit space

Core Design Contradiction:

Adaptability or versatilityVSArea of stationary object

Solution Approach 1:

The patent combines multiple inductive circuits (receiver inductive circuit, transmitter inductive circuit, and antenna inductive circuit) onto a single chip die, integrating functions that were previously distributed across multiple separate circuit areas. This merging reduces overall circuit space while maintaining all necessary functionalities.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The inductor circuit is designed to perform multiple functions simultaneously - serving as receiver inductive circuit, transmitter inductive circuit, and antenna inductive circuit. This multi-functionality allows a single integrated structure to replace multiple separate components, reducing circuit space requirements.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of manufacture

If multiple separate chip dies are used for different coils, then individual circuit implementation is simplified, but overall circuit costs increase

Engineering Contradiction:

Improveindividual circuit implementationVSAvoidcircuit costs

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The patent integrates multiple inductive circuits onto a single chip die, reducing the number of separate components and interconnections required. This integration simplifies the overall manufacturing process and reduces assembly costs despite the increased complexity of the individual chip design.

Inventive Principle:

Principle #5Merging (Combining)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This integration significantly reduces circuit area requirements while improving circuit balancing and signal matching, allowing for more efficient use of chip die space and supporting various wireless communication protocols.

Implementation Method 1

The inductor circuit comprises a receiver inductive circuit, a transmitter inductive circuit, and an antenna inductive circuit

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS12470252B2Inductor circuit and wireless communication device having inductor circuit integrated on single chip die to save more circuit costs

Publication Date: 2025.11.11 PIXART IMAGING INC

AI summary

An inductor circuit includes a receiver inductive circuit, a transmitter inductive circuit, and an antenna inductive circuit which are implemented on a single chip die; the receiver inductive circuit is disposed on a specific ring of a specific plane to form a ring shape; the transmitter inductive circuit and the antenna inductive circuit are disposed inside the specific ring and surrounded by the specific ring of the specific plane; and, a circuit area, occupied by the transmitter inductive circuit, inside the specific ring and on the specific plane, is larger than a circuit area occupied by the receiver inductive circuit and by the antenna inductive circuit.