Connector Signal Processing Without Crystal Oscillator
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Solution Overview
Problem
Connectors without a crystal oscillator face challenges in generating accurate output signals compliant with standards, as they rely on signal streams from host systems for clock signals, which can lead to issues with spread spectrum operations and electromagnetic interference suppression.
Innovation Solution
A signal processing method and connector design that includes a reception circuit, frequency tracking circuit, and transmission circuit, allowing the detection of spread spectrum operations and generation of output signals without a crystal oscillator, by tracking transmission frequencies and determining frequency shift quantities to adjust signal streams accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a connector without a crystal oscillator is used to reduce device complexity and cost, then the connector cannot generate accurate clock signals and output signals compliant with standards
Solution Approach 1:
The patent introduces a frequency tracking circuit as an intermediary component that receives the host system's clock signal and processes it to generate accurate output signals. This mediator enables the connector without a crystal oscillator to achieve standard-compliant signal generation by tracking and adapting the host's clock frequency.
Solution Approach 2:
The frequency tracking circuit implements a feedback mechanism that continuously monitors the host system's clock signal frequency and adjusts the output signal frequency accordingly. This feedback loop ensures that the connector generates accurate clock signals compliant with standards despite lacking a crystal oscillator.
2Object-affected harmful factors
If spread spectrum operation is performed on signal streams to suppress electromagnetic interference, then energy is distributed across a frequency band range, but the signal frequency varies along with time making accurate clock signal generation difficult
Solution Approach 1:
The patent employs dynamic frequency tracking that adapts to time-varying signal frequencies caused by spread spectrum operations. The frequency tracking circuit continuously adjusts to the changing frequency characteristics, enabling the connector to maintain accurate clock signal generation even when the input signal frequency varies over time.
Solution Approach 2:
The frequency tracking circuit performs preliminary processing on the incoming signal stream before it is used for clock signal generation. By pre-tracking and compensating for frequency variations due to spread spectrum operations, the system prepares the signal in advance, ensuring accurate clock recovery without requiring a crystal oscillator.
Data Source
AI summary
A signal processing method, a connector and a memory storage device are provided. The signal processing method is for the connector which does not include a crystal oscillator. The signal processing method includes: receiving a first signal stream from a host system; tracking a transmission frequency of the first signal stream, and obtaining a frequency shift quantity of the first signal stream relative to the transmission frequency; determining if a spread spectrum operation is performed on the first signal stream according to the frequency shift quantity to generate a determination result; generating a second signal stream according to the determination result and the transmission frequency. Accordingly, the spread spectrum operation is handled under the situation without a crystal oscillator.