Signal Transceiver Shared Calibration Circuit
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Solution Overview
Problem
Current signal transceiver devices require independent calibration mechanisms for transmitter and receiver channels, leading to inefficiencies and increased complexity due to the lack of shared calibration processes.
Innovation Solution
A signal transceiver device with a shared calibration mechanism that uses a switching circuit, compensation circuit, and calibration circuit to generate and apply compensation coefficients to both transmitter and receiver channels, allowing for simultaneous calibration of mismatches in both paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If independent calibration mechanisms are used for transmitter and receiver channels, then calibration accuracy is maintained, but device complexity and calibration time increase
Solution Approach 1:
The patent merges the transmitter calibration mechanism and receiver calibration mechanism into a single shared calibration circuit. This calibration circuit can selectively calibrate either the transmitter path or receiver path by switching between different calibration modes, thereby reducing device complexity while maintaining calibration accuracy through unified mismatch parameter measurement and compensation coefficient generation.
Solution Approach 2:
The shared calibration circuit is designed with multi-functionality to perform both transmitter calibration and receiver calibration tasks. By using a single calibration circuit that can operate in different modes (transmitter calibration mode and receiver calibration mode), the system achieves universal calibration capability without requiring separate dedicated calibration circuits for each path.
2Reliability
If independent calibration mechanisms are used for transmitter and receiver channels, then calibration thoroughness is ensured, but calibration time increases
Solution Approach 1:
The patent combines both transmitter and receiver calibration operations into a single shared calibration circuit that operates sequentially. By merging the calibration functions and using a unified calibration process that shares common components (signal generation, mismatch measurement, compensation coefficient calculation), the total calibration time is reduced compared to running two completely independent calibration sequences.
Solution Approach 2:
The calibration system uses periodic switching between transmitter calibration mode and receiver calibration mode. The switching circuit alternates between connecting the calibration signal to the transmitter path and connecting it to the receiver path, enabling both calibrations to be performed in an interleaved periodic manner rather than requiring sequential execution of separate calibration processes.
3Device complexity
If a shared calibration mechanism is used for transmitter and receiver channels, then device complexity is reduced, but calibration flexibility may be compromised
Solution Approach 1:
The shared calibration circuit incorporates dynamic switching capability through a switching circuit that can reconfigure the calibration signal path in real-time. This dynamic reconfiguration allows the single calibration circuit to adapt between different calibration modes (transmitter calibration, receiver calibration) and adjust its operation based on the current calibration requirements, thereby maintaining flexibility despite the reduced hardware complexity.
Solution Approach 2:
The calibration system changes operational parameters (such as switching between different calibration modes, adjusting compensation coefficients for different paths) to maintain flexibility. By dynamically modifying calibration parameters and signal routing configurations rather than relying on fixed dedicated hardware for each path, the system achieves adaptability with a simplified shared calibration mechanism.
Data Source
AI summary
A signal transceiver device includes a transceiver circuit, a switching circuit, a compensation circuit, and a calibration circuit. The transceiver circuit includes a transmitter and a receiver. The switching circuit has a first configuration and a second configuration, in which the transmitter is coupled to the receiver via the switching circuit. The compensation circuit analyzes an output of the receiver to obtain a first analyzed result and a second analyzed result, and generates first compensation coefficients and second compensation coefficients, in which the first analyzed result is corresponding to the first configuration, and the second analyzed result is corresponding to the second configuration. The calibration circuit calibrates the transmitter according to the first compensation coefficients, and calibrates the receiver according to the second compensation coefficients.