Leakage Current Mirror Circuit Using Oscillation-Based Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic devices face issues with leakage currents that can disrupt normal operation and increase power consumption, necessitating efficient and accurate detection methods.
Innovation Solution
A leakage current detection circuit comprising a mirror circuit to copy the leakage current, an oscillation circuit to generate an oscillation signal, and a calculation circuit to determine the current amount, utilizing a feedback loop to maintain node voltage and a charge storage unit to calculate leakage current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional leakage current detection methods are used, then leakage current can be detected, but the detection accuracy and efficiency are insufficient
Solution Approach 1:
The mirror circuit copies the leakage current flowing through the node to generate a copy current in the copy node. This copying mechanism allows the oscillation circuit to process a replicated version of the leakage current without disrupting the original node, thereby improving measurement precision while maintaining detection efficiency through non-invasive current replication.
Solution Approach 2:
The oscillation circuit serves as an intermediary that converts the copy current into an oscillation signal, which is then processed by the calculation circuit. This intermediary transformation enables accurate leakage current detection by translating small current values into measurable oscillation frequencies, resolving the contradiction between detection accuracy and efficiency.
2Measurement precision
If a feedback loop is added to maintain node voltage, then measurement accuracy improves, but device complexity increases
Solution Approach 1:
The feedback loop continuously monitors the voltage at the node and adjusts the mirror circuit operation to maintain the node voltage at a reference level. This feedback mechanism ensures accurate leakage current measurement by preventing voltage fluctuations from affecting the measurement, while the automated nature of feedback reduces the need for manual calibration and complex external control circuits.
3Adaptability or versatility
If the oscillation circuit is designed to work regardless of current direction, then adaptability improves, but circuit complexity increases
Solution Approach 1:
The oscillation circuit is designed with universal functionality to process copy currents regardless of their direction. The circuit uses absolute value detection and frequency modulation techniques that work equally well for positive and negative currents, allowing a single circuit design to handle bidirectional leakage currents without requiring separate detection paths or complex switching mechanisms.
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 effectively and accurately detects and calculates leakage current amounts, regardless of current direction, enhancing device operation performance and reducing power consumption.
Implementation Method 1
a mirror circuit configured to copy a leakage current flowing through a node and generate a copy current in a copy node
Implementation Method 2
an oscillation circuit including a charge storage unit, the oscillation circuit being connected to the copy node, charged with the copy current, and configured to generate an oscillation signal by charging and discharging the charge storage unit
Implementation Method 3
the mirror circuit comprising a feedback loop configured to substantially maintain a voltage of the node as a reference voltage
Data Source
AI summary
A leakage current detection circuit includes: a mirror circuit configured to copy a leakage current flowing through a node and generate a copy current in a copy node; an oscillation circuit including a charge storage unit, the oscillation circuit being connected to the copy node, charged with the copy current, and configured to generate an oscillation signal by charging and discharging the charge storage unit; and a calculation circuit configured to calculate an amount of the leakage current based on the oscillation signal.