RF Domain Calibration for Transceiver Chip Area Reduction
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Solution Overview
Problem
Existing radio frequency transceiver circuit systems lack adaptive real-time calibration and optimization capabilities in the radio frequency domain, leading to suboptimal performance across different modes, conditions, and applications, with conventional digital calibration methods being inflexible and increasing chip area and cost.
Innovation Solution
A radio frequency domain calibration system that includes a calibration unit with a control unit and regulation unit, capable of programmable, configurable, and adaptive real-time regulation of circuit structures and parameters, eliminating the need for analog-to-digital signal conversion and enabling calibration across various types of radio frequency circuit units and systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If digital domain calibration methods are used, then calibration functionality is provided, but chip area increases significantly (layout area close to half of single-channel transceiver chip)
Solution Approach 1:
The patent replaces the digital domain calibration system with an analog domain calibration system. Instead of using digital logic circuits, ADCs, and complex calibration algorithms in the digital domain, the invention implements calibration directly in the analog radio frequency domain using analog circuit elements such as variable capacitors, variable inductors, and attenuators controlled by digital-to-analog converters and control logic, thereby reducing the calibration circuit area while maintaining calibration functionality.
2Adaptability or versatility
If digital calibration algorithms are integrated, then calibration is implemented, but chip cost increases due to large layout area
Solution Approach 1:
The patent substitutes the costly digital calibration approach with an analog calibration approach. The digital calibration method requires large areas for digital logic circuits and complex algorithms, while the analog method uses compact analog circuitry with variable components (capacitors, inductors, attenuators) that can be precisely controlled with minimal area, thereby reducing manufacturing costs while preserving calibration capability.
Solution Approach 2:
The patent changes the domain of calibration from digital to analog by modifying the operating parameters and control mechanisms. Instead of processing digital signals through complex algorithms, the system adjusts analog parameters (capacitance, inductance, attenuation) directly in the radio frequency domain, enabling calibration with simpler, more area-efficient circuitry that reduces chip cost.
3Adaptability or versatility
If conventional digital calibration is used, then calibration is performed, but adaptability to different circuit systems is limited
Solution Approach 1:
The patent creates a universal analog calibration system that can be applied to multiple different circuit systems and topologies. The calibration architecture uses generic analog building blocks (variable capacitors, inductors, attenuators) and control mechanisms that can be configured for various circuit types (amplifiers, mixers, filters, oscillators) without requiring system-specific digital algorithms, thereby enhancing adaptability while maintaining manageable complexity through standardized analog components.
Data Source
AI summary
A radio frequency domain calibration system and method for radio frequency circuit units is provided. The system regulates and calibrates radio frequency integrated circuit devices, circuit modules and transceiver circuit systems including circuit components in the radio frequency domain through calibration units. The calibration unit includes a calibration control unit and a calibration regulation unit, where the calibration control unit generates a calibration control signal, and drives the calibration regulation unit to perform programmable, adaptive, and real-time regulation on the circuit structure, geometric scale, and working parameters of the radio frequency circuit unit, so that the radio frequency circuit unit works in a desired condition with optimized performances. Compared with existing digital domain calibration systems, the radio frequency domain calibration system has smaller chip area, lower cost, and higher regulation flexibility and module configuration flexibility.