Balun-Coupled Feedback Current Path for High-SNR Transceivers
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Solution Overview
Problem
The existing transceivers face challenges in maintaining signal-to-noise ratio (SNR) due to interference from high-frequency signals transmitted through long wirings, which affects the normal operation of other modules, especially as chip size decreases and isolation between modules becomes difficult to guarantee.
Innovation Solution
A transmitter and transceiver system that employs a feedback current generation module forming electromagnetic coupling with a balun to generate a feedback current signal, which is used instead of traditional voltage signals, reducing interference and improving SNR by transmitting signals in a current mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-frequency signals are transmitted through long wirings from TXs to ORXs, then feedback reception is enabled for IQ calibration and DPD algorithms, but interference with other modules occurs and SNR is degraded
Solution Approach 1:
The patent extracts the feedback signal transmission path from the traditional long wiring approach and implements it through electromagnetic coupling between coils. The induction coil in the transmitter couples with the reception coil in the receiver, enabling feedback signal transmission without using long physical wirings that cause interference with other modules.
Solution Approach 2:
The patent introduces magnetic coupling as an intermediary mechanism between the transmitter and receiver. The induction coil generates a magnetic field that couples with the reception coil, serving as a mediator to transfer the feedback signal without direct electrical connection, thereby avoiding interference with other modules while maintaining signal integrity.
2Area of stationary object
If chip area is reduced to meet smaller form factor requirements, then integration density increases, but isolation between modules becomes difficult to guarantee
Solution Approach 1:
The patent extracts the feedback signal transmission function from the traditional wiring approach and implements it through electromagnetic coupling. This allows the feedback path to be established without occupying additional physical space for long wirings, enabling chip area reduction while maintaining module isolation through non-contact coupling.
Solution Approach 2:
The patent transitions from planar wiring-based signal transmission to three-dimensional electromagnetic field-based transmission. The induction and reception coils utilize magnetic field coupling in the vertical dimension, allowing signals to be transmitted through space rather than through physical wirings, thereby improving isolation while reducing chip area requirements.
3Adaptability or versatility
If advanced transistors are used to achieve higher integration, then chip functionality is enhanced, but reliability requirements increase due to sensitivity to high-frequency signal swings
Solution Approach 1:
The patent introduces magnetic coupling as an intermediary that isolates the high-frequency signal swings in the transmitter from the receiver. The magnetic field acts as a buffer that transfers signal information without directly transmitting voltage swings, thereby protecting advanced transistors in the receiver from reliability-degrading high-frequency stress while maintaining enhanced chip functionality.
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 current transmission mode minimizes high-frequency signal interference with other modules, enhancing SNR and reducing the reliability requirements of advanced transistors, thus increasing chip usage time and lifetime.
Implementation Method 1
the feedback current generation module is configured to form electromagnetic coupling with the balun to generate a feedback current signal
Implementation Method 2
the induction coil forms electromagnetic coupling with the primary coil and the secondary coil to induce the feedback current signal
Data Source
AI summary
The present disclosure provides a transmitter, a transceiver and a signal transmission method thereof. The transmitter comprises a signal amplification module, a balun and a feedback current generation module; the signal amplification module is configured to receive an input signal, amplify the input signal and output a differential signal to the balun; the balun is configured to receive the differential signal and convert the differential signal into a single-ended signal; and the feedback current generation module is configured to form electromagnetic coupling with the balun to generate a feedback current signal, wherein the feedback current signal is used as an input signal to a receiver. The transceiver and the signal transmission method provided by the present disclosure generate a feedback current signal according to the differential signal output by the signal amplification module, and input the feedback current signal instead of the traditional differential voltage signal to the receiver, thereby improving the signal noise ratio of the system.