Injection-Locked Oscillator Clock Distribution With Lock-State Detection
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Solution Overview
Problem
Integrating injection-locked oscillators into transceiver arrays for advanced communication systems, particularly in 5G technology, poses challenges such as maintaining injection locking and reducing complexity in multiple antenna configurations, which can lead to unwanted emissions and frequency drift due to environmental variations.
Innovation Solution
A system and method that includes a master clock generator, injection-locked oscillator distribution circuits, and an injection-locked detector to determine whether injection-locked oscillators are in a locked or unlocked state, using a master clock signal and output signal to provide a reference clock and ensure proper frequency operation, thereby maintaining injection locking and reducing system complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple independent oscillators are used in transceiver arrays for 5G communication, then frequency coverage and communication capability are improved, but system complexity and susceptibility to environmental variations increase
Solution Approach 1:
The patent merges multiple independent oscillators into a unified injection-locked oscillator system where multiple oscillators are synchronized to a single master clock signal. This combining approach maintains the frequency coverage benefits of multiple oscillators while reducing system complexity through centralized control and phase synchronization.
Solution Approach 2:
The master clock generator serves as a universal control source for all injection-locked oscillators in the transceiver array. This multi-functional master clock provides timing and frequency reference to multiple oscillators simultaneously, eliminating the need for separate control circuits for each oscillator and thereby reducing overall system complexity.
2Device complexity
If injection-locked oscillators are used to reduce system complexity, then device complexity is reduced, but maintaining injection locking and preventing frequency drift becomes more challenging
Solution Approach 1:
The patent implements feedback mechanisms where the state of each injection-locked oscillator is monitored and compared against the master clock signal. This feedback allows the system to detect and correct frequency drift or locking failures, thereby maintaining reliability despite the reduced complexity of the oscillator architecture.
Solution Approach 2:
The system dynamically adjusts the injection locking parameters and oscillator operating conditions to maintain stable locking across varying environmental conditions. This dynamic adaptation ensures that the simplified oscillator architecture remains reliable despite changes in temperature, voltage, or load conditions.
3Adaptability or versatility
If multiple antennas are deployed for 5G frequency bands, then communication capability is improved, but unwanted emissions and frequency drift increase
Solution Approach 1:
The patent segments the transceiver system into multiple independent transceiver paths, each with its own injection-locked oscillator synchronized to a common master clock. This segmentation allows each antenna path to operate independently with controlled emissions while maintaining overall system coordination through the master clock synchronization.
Data Source
AI summary
Systems and methods for integrating injection-locked oscillators into transceiver arrays are disclosed. In one aspect, there is provided an injection-locked oscillator (ILO) distribution system including a master clock generator configured to generate a master clock signal. The ILO distribution system also includes an ILO distribution circuit including an ILO and configured to receive the master clock signal. The ILO is configured to generate a reference clock signal based on the master clock signal. The ILO distribution circuit is further configured to generate an output signal indicative of an operating frequency of the ILO. The ILO distribution system further includes an injection-locked detector (ILD) configured to receive the master clock signal and the output signal. The ILD is further configured to determine whether the ILO is in a locked state or in an unlocked state based on the master clock signal and the output signal.