Ultrasonic Handpiece Linear Amplifier for Wide-Range Drive Signals
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Solution Overview
Problem
Ultrasonic surgical tool systems face limitations in generating drive signals over a wide range of frequencies and voltages, leading to reduced efficiency and the need for multiple consoles for different handpieces with varying requirements, resulting in increased costs and administrative burdens.
Innovation Solution
A console with a linear amplifier, power supply, and transformer that can rapidly ramp up signal potential, minimizing energy loss and enabling drive signals across a wide frequency and voltage range, allowing for efficient operation of handpieces with diverse characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional ultrasonic console is used, then it can operate handpieces within a limited frequency and voltage range, but it requires multiple consoles for different handpiece requirements and incurs increased costs and administrative burdens
Solution Approach 1:
The ultrasonic console is designed with a linear amplifier that can generate drive signals across a wide frequency range (20-100 kHz) and voltage range (0-1500 V), allowing a single console to operate multiple types of ultrasonic handpieces with different resonant frequency and impedance requirements, thereby eliminating the need for multiple specialized consoles
Solution Approach 2:
The linear amplifier dynamically adjusts the frequency and voltage parameters of the drive signal based on the specific handpiece requirements, enabling the console to adapt to different handpiece characteristics by changing operational parameters rather than requiring hardware changes
2Speed
If a conventional amplifier is used, then it cannot rapidly ramp up signal potential, but this results in increased energy loss and time lag between tip application and vibration
Solution Approach 1:
The linear amplifier is designed to rapidly ramp up the signal potential from zero to the required voltage level almost instantaneously when the handpiece is activated, eliminating time lag and ensuring immediate vibration upon tip application to tissue, thereby preventing energy loss during delayed activation
Solution Approach 2:
The patent replaces conventional switching amplifiers or mechanical relay-based systems with a linear amplifier that provides continuous, smooth control of the drive signal voltage, enabling rapid and precise potential ramp-up without the energy losses associated with switching transients and mechanical contact delays
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
The console provides efficient and flexible drive signals, reducing energy loss and time lag between tip application and vibration, enabling precise tissue removal across various handpieces without the need for multiple consoles.
Implementation Method 1
A console with a linear amplifier, power supply, and transformer that can rapidly ramp up signal potential
Implementation Method 2
A console with a linear amplifier, power supply, and transformer
Implementation Method 3
an ultrasonic surgical tool includes a handpiece that contains at least one piezoelectric driver
Implementation Method 4
The vibrating head of the tip is applied against tissue to perform a specific surgical or medical task
Implementation Method 5
Other ultrasonic tips remove tissue by inducing cavitation in the tissue and surrounding fluid
Data Source
AI summary
A control console for a powered surgical tool. The console includes a transformer that supplies the drive signal to the surgical tool. A linear amplifier with active resistors selectively ties the ends of the transformer primary winding between ground and the open circuit state. Feedback voltages from the transformer windings regulate the resistances of the active resistors.