Partitioned RF Transceiver Circuitry for Interference Isolation
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Solution Overview
Problem
Current RF transceivers face challenges in integrating circuitry to minimize interference among components while meeting performance standards for low-cost, low-form-factor, and high-performance applications, particularly in cellular handsets, as existing techniques fail to effectively address noise, inter-modulation, blocking, and spectral emission requirements.
Innovation Solution
The RF transceiver circuitry is partitioned into separate circuit blocks, with each block residing within an integrated circuit device, and interfaced using differential signals to reduce interference, and the local oscillator circuitry is partitioned separately to mitigate interference mechanisms, allowing for low-cost, low-form-factor, and high-performance RF solutions that meet GSM, PCS, DCS, EDGE, and GPRS standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If RF transceiver circuitry is integrated into a single IC to reduce cost and form factor, then manufacturing cost and device size are reduced, but interference among circuit blocks increases
Solution Approach 1:
The RF transceiver circuitry is divided into multiple separate circuit partitions, each housing specific functional blocks. This segmentation allows sensitive components to be isolated from noisy components while remaining on the same IC, thus reducing interference among circuit blocks while maintaining integration benefits for cost and form factor reduction.
2Volume of moving object
If RF transceiver circuitry is integrated into a single IC to reduce form factor, then device size is reduced, but interference among circuit blocks increases
Solution Approach 1:
The RF transceiver is partitioned into multiple circuit blocks distributed across different partitions on the same IC. This spatial segmentation enables sensitive receive path circuitry to be separated from noisy transmit path and local oscillator circuitry, reducing electromagnetic interference while maintaining a compact single-IC form factor suitable for mobile devices.
3Object-affected harmful factors
If circuit partitions are separated to reduce interference, then interference among circuit blocks is reduced, but device complexity increases
Solution Approach 1:
Multiple circuit partitions are integrated onto a single IC substrate, merging the benefits of physical separation (reduced interference) with the benefits of integration (reduced complexity in packaging, interconnections, and assembly). The partitioning is implemented through standard IC design techniques, managing complexity through systematic placement and routing rather than requiring separate physical devices.
Data Source
AI summary
A radio-frequency apparatus includes an integrated circuit. The integrated circuit includes receiver analog circuitry, receiver digital circuitry, a digital-to-analog converter, and a signal selector. The receiver analog circuitry receives radio-frequency signals, and provides a first digital signal. The receiver digital circuitry receives the first digital signal, and provides a second digital signal. The digital-to-analog converter converts the second digital signal into a first analog signal. The signal selector receives the second digital signal and the first analog signal, and selectively provides one of the second digital signal and the first analog signal as an output signal of the integrated circuit.