Waveguide Driving Circuit Low-Voltage Current Pulse Generation
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Solution Overview
Problem
Conventional waveguide driving circuits require high supply voltages to achieve steep-edge current pulses, leading to increased component costs and power losses due to inefficient current regulation and termination methods.
Innovation Solution
A waveguide driving circuit utilizing a choke and switches to generate a current pulse, where the choke stores current from a low-voltage source and transfers it to the waveguide, eliminating the need for high-voltage sources and reducing power losses through a terminating inductance and diode configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high supply voltage is used to achieve steep-edge current pulses, then current pulse quality is improved, but component cost and power losses increase
Solution Approach 1:
The circuit performs preliminary action by pre-charging a capacitor through a current source before the actual current pulse is needed. This allows the system to store energy in advance at low voltage, then rapidly transfer it to generate the high-voltage current pulse without requiring continuous high-voltage power supply, thereby reducing power losses while maintaining pulse quality
Solution Approach 2:
The circuit employs periodic action through oscillating circuit elements that periodically charge and discharge the capacitor. This periodic operation allows the system to build up voltage gradually over multiple cycles and then release it as a sharp current pulse, achieving steep edges without sustained high-voltage operation that would cause excessive power losses
2Manufacturing precision
If high supply voltage is used to achieve steep-edge current pulses, then current pulse quality is improved, but component cost increases
Solution Approach 1:
The circuit performs preliminary action by pre-charging a capacitor through a current source before the actual current pulse is needed. This allows the system to store energy in advance at low voltage, then rapidly transfer it to generate the high-voltage current pulse without requiring continuous high-voltage power supply, thereby reducing power losses while maintaining pulse quality
Solution Approach 2:
The circuit applies parameter changes by dynamically altering the voltage and current parameters through capacitor charging and discharging cycles. The system transforms low-voltage continuous power into high-voltage pulsed power, changing the operational parameters temporarily only when needed, which avoids the cost of high-voltage components operating continuously
3Device complexity
If conventional current regulation methods are used, then circuit simplicity is maintained, but power losses increase
Solution Approach 1:
The circuit employs periodic action through oscillating circuit elements that periodically charge and discharge the capacitor. This periodic operation allows the system to build up voltage gradually over multiple cycles and then release it as a sharp current pulse, achieving steep edges without sustained high-voltage operation that would cause excessive power losses
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 solution allows for the generation of high-intensity current pulses with steep edges at lower costs, improving the resolution and sensitivity of magnetostrictive position measurements while minimizing power consumption and thermal issues.
Implementation Method 1
A waveguide driving circuit for generating a current pulse in a waveguide is proposed. The circuit has a voltage source for providing a direct voltage, a choke the first terminal of which is in direct-current coupling to a first terminal of the voltage source
Implementation Method 2
controlling means implemented to open and close the first switch to generate a current pulse at the terminals of the waveguide at the first waveguide end, wherein the waveguide driving circuit is implemented such that at a switching time when the first switch is brought from a conducting state to a high-impedance state, a current impressed on the waveguide equals a current flowing through the choke directly before switching
Data Source
AI summary
A waveguide driving circuit for generating a current pulse in a waveguide includes a voltage source for providing a direct voltage, a choke the first terminal of which is coupled to a first terminal of the voltage source, a first switch the first terminal of which is coupled to a second terminal of the choke and the second terminal of which is coupled to a second terminal of the voltage source, the waveguide the first terminal of which at a first waveguide end is coupled to the first terminal of the first switch and the second terminal of which at the first waveguide end is coupled to a second terminal of the voltage source, and a controller implemented to open and close the first switch, to generate a current pulse at the terminals of the waveguide at the first waveguide end.