RF Power Resonance Amplifier Driving Signal Control
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Solution Overview
Problem
RF power resonance amplifiers struggle to achieve steep signal edges and rapid dying down of pulses, which is crucial for applications like opto-acoustic Q-switches in pulsed inscription lasers, due to the dependence on the quality of the output oscillating circuit, leading to inefficiencies in spectral purity and dying down periods.
Innovation Solution
A method where the output oscillating circuit of an RF power resonance amplifier is driven with a driving signal that differs from the basic signal in terms of phase, frequency, or pulse-duty factor, accelerating excitation and dying down, and generating an output signal with steep edges by intentionally altering the frequency or power supply during specific times, thereby reducing the dying down process and maintaining high spectral purity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the quality of the output oscillating circuit is increased to improve spectral purity, then the dying down period increases, making it difficult to achieve rapid pulse interruption
Solution Approach 1:
A preliminary voltage spike is applied to the gate of the transistor before the actual pulse to ensure rapid and complete switching-on of the resonance amplifier. This preliminary action prepares the circuit for optimal performance during the pulse and rapid shutdown afterward, resolving the contradiction between maintaining high spectral purity and achieving fast dying down.
Solution Approach 2:
The invention uses periodic pulsing with controlled duty cycles, where the amplifier is fully activated during the pulse and rapidly deactivated during the off-period. This periodic operation allows the circuit to maintain high quality factors during active periods while achieving rapid dying down during inactive periods, thus resolving the contradiction between spectral purity and dying down time.
2Speed
If a broadband amplifier is used to achieve steep signal edges and rapid dying down, then the device complexity and cost increase significantly
Solution Approach 1:
The invention changes the operating parameters of a standard resonance amplifier by applying a preliminary voltage spike to the transistor gate and controlling the pulse duty cycle. This parameter modification allows a narrowband resonance amplifier to achieve steep signal edges and rapid dying down that would normally require complex broadband amplifiers, thus reducing device complexity and cost while maintaining performance.
Solution Approach 2:
The invention copies the functional characteristics of broadband amplifiers (steep edges, rapid dying down) by using a different approach - applying preliminary gate voltage spikes and controlled pulsing to a resonance amplifier. This functional copying achieves the same performance benefits without the complexity and cost of actual broadband amplifier design.
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 approach facilitates faster and more controlled dying down of pulses, achieving high spectral purity and steep signal edges with reduced complexity and cost compared to existing broadband amplifiers, making it suitable for applications requiring rapid energy dissipation.
Implementation Method 1
an output oscillating circuit of the RF power resonance amplifier is driven with a driving signal that differs from a basic signal of an oscillator that feeds the RF power resonance amplifier
Data Source
AI summary
A method is performed for influencing the signal shape of an output signal of an RF power resonance amplifier and an RF excitation arrangement including an RF power resonance amplifier. A basic signal of a basic frequency is amplified and modulated with a modulation signal, and an output oscillating circuit of the RF power resonance amplifier is tuned to a frequency in the range of the basic frequency, and is excited with the basic signal during normal operation. At times that are or can be predetermined, the output oscillating circuit is driven with a driving signal that differs from the basic signal, for a time period that is or can be predetermined. This reduces the dying down time of the output oscillating circuit and increases the steepness of the output signal edges.