Gate Driver Feedback Resistor Circuit for Fast Capacitive Charging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing gate drivers for motors or actuators face challenges in efficiently generating a voltage level without additional expensive circuitry and space-consuming components, and require efficient and fast charging of capacitive loads.
Innovation Solution
A circuit arrangement with a current source and current mirror, along with a feedback resistor, allows for efficient current mirroring and voltage regulation, enabling fast charging and stable voltage delivery to capacitive loads without additional components or voltage regulators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If additional circuitry is used to generate voltage level, then voltage generation capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines the voltage level generation function with the existing current mirror circuitry. The current mirror inherently generates the required voltage levels through its operation, eliminating the need for separate voltage generation circuitry. This merging of functions reduces device complexity while maintaining voltage generation capability.
Solution Approach 2:
The circuit uses its own operating currents to generate the required voltage levels. The current mirror circuit generates voltage levels as a byproduct of its normal operation, without requiring external voltage regulators or additional power management circuitry. The system serves its own voltage generation needs through its inherent operation.
2Power
If additional circuitry is used to generate voltage level, then voltage generation capability is improved, but area consumption increases
Solution Approach 1:
The voltage generation function is merged with the existing current mirror circuit, which already occupies the necessary area for current replication. By utilizing the same transistors and circuit elements for both current mirroring and voltage level generation, no additional area is required beyond what is already needed for the gate driver's current mirror functionality.
Solution Approach 2:
The current mirror circuit performs multiple functions: it replicates currents for gate driving and simultaneously generates the required voltage levels for operation. This multi-functionality eliminates the need for dedicated voltage generation components, thereby reducing the total circuit area while maintaining all necessary capabilities.
3Productivity
If conventional gate driver is used, then basic driving function is achieved, but charging speed of capacitive load is insufficient
Solution Approach 1:
The patent implements a feedback mechanism where the output voltage is monitored and used to control the current mirror operation. This feedback ensures that the output voltage remains compatible with the supply voltage while enabling faster charging currents. The feedback loop adjusts the mirror current dynamically to achieve both fast charging and voltage compatibility.
Solution Approach 2:
The circuit transitions from static current mirroring to dynamic current control based on output voltage conditions. The current mirror adjusts its replication ratio and output current in real-time according to the capacitive load charging state, enabling faster charging speeds while maintaining voltage compatibility through adaptive operation.
4Productivity
If higher current is provided for fast charging, then charging speed is improved, but current consumption increases
Solution Approach 1:
The circuit employs periodic or pulsed current delivery to charge the capacitive load. The current mirror operates in bursts or pulses rather than continuous high current, providing fast charging when needed while allowing current consumption to drop during intervals. This periodic action achieves fast charging performance without sustaining high average current consumption.
Solution Approach 2:
The circuit dynamically changes current parameters based on charging requirements. During fast charging phases, the current mirror provides high current, but as the capacitive load approaches full charge, the current is automatically reduced. This parameter change enables fast charging speed while minimizing overall current consumption through adaptive current control.
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 setup achieves a faster settling speed and reduced current consumption, ensuring efficient operation and stability of the driving voltage, eliminating the need for extra controls or switches.
Implementation Method 1
A circuit arrangement with a current source and current mirror, along with a feedback resistor, allows for efficient current mirroring and voltage regulation
Implementation Method 2
A circuit arrangement with a current source and current mirror, along with a feedback resistor, allows for efficient current mirroring and voltage regulation
Implementation Method 3
supply a capacitive load with charge
Data Source
AI summary
A circuit arrangement is provided where the arrangement of a feedback resistor between a first branch and a second branch enables that a voltage is provided at an output terminal in an efficient way, this means with a high settling speed and a low current consumption. The feedback resistor is arranged between a reference node and the output terminal, where the reference node is connected to a current mirror. The circuit arrangement can be employed as a gate driver. Furthermore, a driver block and a method of driving a circuit arrangement are provided.