Current-to-Voltage Converter Filtering for Transceiver Leakage

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Solution Overview

Problem

High-frequency wireless communication systems face degradation in reception performance due to signal leakage from transmitter to receiver circuits, particularly in integrated transceivers, which are vulnerable to leakage signals.

Innovation Solution

A current-to-voltage converter with a transimpedance amplifier and dual filter circuits, including a low-pass and band-pass filter, is implemented to minimize signal leakage effects, with adjustable cutoff frequencies and bandwidths to enhance reception performance while meeting design constraints on size and weight.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a transceiver is highly integrated to process signals in a high-frequency band, then productivity and device compactness are improved, but reception performance deteriorates due to signal leakage from transmitter to receiver circuits

Engineering Contradiction:

Improvesignal processing capabilityVSAvoidreception performance

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The receiver circuit is segmented into multiple functional blocks including a leakage signal remover, current-to-voltage converter, and filter. The leakage signal removal function is separated as a distinct preprocessing stage before the main signal processing chain, allowing independent optimization of each function to maintain reception performance while preserving integration benefits

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A leakage signal remover is introduced as an intermediary component between the integrated transceiver circuits and the main receiver processing chain. This mediator selectively removes leakage signals before they can interfere with the reception signal processing, enabling high integration while protecting reception performance

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If filter circuits are added to remove leakage signals, then reception performance is improved, but device area increases

Engineering Contradiction:

Improvereception performanceVSAvoidfilter circuit area

Core Design Contradiction:

ReliabilityVSArea of moving object

Solution Approach 1:

The leakage signal removal function is merged with the existing current-to-voltage converter and filter circuitry in the receiver chain. By combining multiple functions into shared components, the patent achieves effective leakage removal without proportionally increasing the device area, as the same hardware structures serve multiple purposes in the signal processing chain

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

The solution effectively filters out leakage signals, improving reception sensitivity and performance in transceivers, while maintaining a compact design suitable for wireless communication devices.

Implementation Method 1

a current-to-voltage converter includes a transimpedance amplifier

Methodology Applied

Scientific EffectCurrent-to-voltage conversion: Ohm's Law

Implementation Method 2

The first filter circuit is configured to operate as a low-pass filter with respect to the current signal

Methodology Applied

Scientific EffectLow-pass filtering: Filter (electronic)

Implementation Method 3

The second filter circuit is configured to operate as a band-pass filter with respect to the current signal

Methodology Applied

Scientific EffectBand-pass filtering: Filter (electronic)

Data Source

PatentUS12489486B2Current-to-voltage converter, transceiver, and wireless communication device

Publication Date: 2025.12.02 SAMSUNG ELECTRONICS CO LTD

AI summary

The present disclosure provides apparatuses for converting a current signal into a voltage signal. In some embodiments, a current-to-voltage converter includes a transimpedance amplifier, a first filter circuit coupled between an input node of the transimpedance amplifier and an internal node of the transimpedance amplifier, and a second filter circuit coupled between the input node of the transimpedance amplifier and an output node of the transimpedance amplifier. The first filter circuit is configured to operate as a low-pass filter with respect to the current signal. The second filter circuit is configured to operate as a band-pass filter with respect to the current signal. In some embodiments, a transceiver includes a receiver circuit that includes a current-to-voltage converter, a transmitter circuit. The current-to-voltage converter is configured to convert a current signal corresponding to a first reception signal into a voltage signal corresponding to a second reception signal.