Oscillator Current Shaping for Phase Jitter Mitigation
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Solution Overview
Problem
Periodic signals in existing technologies often suffer from phase jitter, which can lead to mis-timing in timing-sensitive operations and failure in applications such as communication systems, due to unintended currents and parasitic effects in oscillator circuits.
Innovation Solution
The solution involves using an oscillator circuit with a frequency adjustment circuit and additional circuitry to increase the intended current, thereby dominating unintended currents and mitigating phase jitter. The amount of additional circuitry connected to the oscillator circuit varies based on the frequency of the periodic signal, with more circuitry connected for higher frequencies to mitigate greater phase jitter effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional circuitry is connected to the oscillator circuit to increase intended current, then phase jitter is mitigated, but device complexity increases
Solution Approach 1:
The system dynamically adjusts the amount of additional circuitry connected to the oscillator circuit based on the operating frequency. At higher frequencies where phase jitter has larger effects, more circuitry is connected to provide greater current dominance. At lower frequencies, less circuitry is connected to minimize complexity. This dynamic adaptation resolves the contradiction by making the complexity increase conditional rather than fixed.
Solution Approach 2:
The system changes the parameter of circuitry connection amount based on the frequency of operation. By monitoring the frequency and adjusting the degree of circuitry connection accordingly, the system optimizes the balance between phase jitter mitigation and device complexity. This parameter-based adaptation allows the system to achieve reliability improvements only when and where needed.
2Reliability
If more circuitry is connected to mitigate phase jitter at higher frequencies, then signal stability improves, but power consumption increases
Solution Approach 1:
The system dynamically adjusts power consumption by connecting different amounts of circuitry based on operating frequency. At higher frequencies where signal stability is more critical, more circuitry is activated accepting higher power consumption. At lower frequencies, less circuitry is active reducing power consumption. This dynamic power management resolves the contradiction by aligning power expenditure with actual stability needs.
3Reliability
If the amount of current through the oscillator circuit is increased to dominate unintended currents, then phase jitter decreases, but device complexity increases
Solution Approach 1:
The system changes the parameter of current magnitude based on operating conditions. By increasing current only when and where phase jitter becomes significant (at higher frequencies), the system achieves reliability improvements without unnecessarily increasing device complexity across all operating conditions. This selective parameter adjustment resolves the contradiction.
Data Source
AI summary
An oscillator circuit can generate a periodic signal, and a frequency adjustment circuit can adjust the frequency of the periodic signal. The periodic signal may include phase jitter. In one aspect of the invention, the phase jitter may be mitigated by connecting other circuitry to the oscillator circuit and allowing the other circuitry to draw current. In one embodiment, the other circuitry is connected in parallel with the oscillator circuit. In one embodiment, the other circuitry is configured to draw greater current to mitigate more phase jitter and to draw less current to mitigate less phase jitter. In one embodiment, a greater portion of the other circuitry is connected to the oscillator circuit for higher frequencies and a lesser portion of the other circuitry is connected to the oscillator circuit for lower frequencies.