Injection-Locked OOK Modulator for Fast Startup at Low Power
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Solution Overview
Problem
Current OOK modulation devices in millimeter bands face limitations in achieving high data rates while maintaining low power consumption, particularly in nomadic applications where energy efficiency is crucial.
Innovation Solution
The proposed OOK modulation device employs an injection-locked oscillator with a resonant circuit and a crossed pair of field-effect transistors, utilizing a periodic signal supply and an unbalance transistor to accelerate startup and reduce power consumption, enabling higher data rates without increasing energy usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the oscillator is switched on and off continuously to achieve OOK modulation, then power consumption is reduced, but the startup time increases and data rate is limited
Solution Approach 1:
The patent applies preliminary action by pre-biasing the oscillator circuit before switching it on. The unbalancing transistor is activated beforehand to set up the necessary conditions for rapid oscillation startup, allowing the oscillator to reach full amplitude quickly after power is applied, thus enabling high data rates without increasing power consumption
2Speed
If the oscillator startup is accelerated by unbalancing techniques, then data rate increases, but power consumption increases
Solution Approach 1:
The patent employs periodic action by using pulsed control signals to activate the unbalancing transistor only during the brief startup period. The transistor is switched on momentarily to establish oscillation, then turned off to maintain the oscillating state without continuous power consumption, achieving fast startup with minimal energy expenditure
3Productivity
If the oscillator is left running continuously to enable fast switching, then data rate is maintained, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the oscillator circuit configurable between different operational states. The unbalancing transistor allows the circuit to dynamically transition from a low-power standby state to a high-performance oscillating state on demand, optimizing the balance between power consumption and data rate based on actual communication needs
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows for faster startup and higher data rates while maintaining low power consumption, making it suitable for energy-efficient high-speed communications in millimeter bands.
Implementation Method 1
a resonant circuit, for example of the LC type
Data Source
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AI summary
Device (100) for OOK modulation of an input signal, comprising at least: - an injection locked oscillator (102) comprising a power supply input (104), an injection signal input (106) and an output (108) on which the modulated signal OOK is intended to be delivered; - a first controlled switch (110) comprising a control input (114) to which the input signal is intended to be applied, and configured to couple or not an electrical power source (112) to the input of power supply of the injection locked oscillator according to the value of the input signal; - a periodic signal supply device (116) configured to supply on an output (118), which is electrically coupled to the injection signal input of the injection locked oscillator, a periodic injection signal whose frequency and amplitude trigger a lock of the injection locked oscillator on the frequency of the injection signal or a multiple of this frequency.