Capacitive Load Discharge Circuit With Comparator Current Control
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Solution Overview
Problem
EEPROM memories face challenges in rapidly discharging capacitive loads, such as programming and erase lines, while limiting discharge current to prevent circuit destruction and minimizing the load on the potential source during the discharge process.
Innovation Solution
A circuit arrangement with a first and second connecting terminal, a third switching element, and a drive circuit with a comparator arrangement, which compares potentials to control the discharge process, ensuring the capacitive load is discharged from a high potential to a low potential efficiently and safely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a rapid discharge of the capacitive load is implemented, then the discharge speed is improved, but the maximum discharge current increases which may cause circuit destruction
Solution Approach 1:
The patent employs dynamic control of the discharge current through a control unit that adjusts the discharge current magnitude based on real-time monitoring of the potential difference between the capacitive load and reference potential. This dynamic adjustment allows the system to achieve rapid discharge while preventing excessive current that could destroy the circuit, directly resolving the contradiction between discharge speed and circuit safety.
2Loss of time
If a rapid discharge is implemented, then the discharge time is reduced, but the load on the potential source increases
Solution Approach 1:
The patent implements a feedback mechanism where a monitoring unit continuously measures the potential difference between the capacitive load and reference potential, and a control unit adjusts the discharge current based on this feedback. This closed-loop control enables the system to discharge the capacitive load rapidly while minimizing unnecessary current flow, thereby reducing the load on the potential source and resolving the contradiction between discharge speed and energy consumption.
3Reliability
If the discharge current is limited to prevent circuit destruction, then circuit safety is improved, but the discharge speed decreases
Solution Approach 1:
The system uses dynamic current control where the discharge current magnitude is continuously adjusted based on real-time potential difference monitoring. This allows the discharge current to be high enough to achieve rapid discharge when the potential difference is large, while automatically reducing the current as the potential difference decreases, thereby maintaining both circuit safety and high discharge speed throughout the discharge process.
Solution Approach 2:
The patent changes the discharge current parameter dynamically during the discharge process based on the potential difference between the capacitive load and reference potential. By adjusting this critical parameter in real-time, the system achieves both rapid discharge and circuit protection, resolving the contradiction between discharge speed and circuit safety.
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 circuit enables rapid and reliable discharge of capacitive loads with minimal loading on the potential source, effectively preventing circuit destruction and ensuring efficient operation.
Implementation Method 1
a voltage-controlled third switching element having a load path and a control connection, the load path of which is connected between one of the first and second connecting terminals and the control connection of the second switching element
Implementation Method 2
discharge circuit for a capacitive load
Data Source
AI summary
A circuit arrangement for the defined discharge of a capacitive load includes a first connecting terminal for connection of the load, a second connecting terminal for application of a predetermined potential, and a third connecting terminal for application of a discharge signal. The circuit arrangement further includes a first switching element, having a load path and a control connection, the load path of which is connected between the first and second connecting terminals and a second switching element, having a load path and a control connection, the load path of which is connected between the first connecting terminal and a terminal for reference potential. The first switching element is driven in a manner dependent on a switching state of the second switching element. The second switching element is driven by a drive circuit to which the discharge signal is fed and which includes a comparator arrangement.