Thermal Detection Circuit Using Capacitive Pulse Timing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Semiconductor devices face reliability issues due to temperature variations, as existing thermal monitoring systems are inefficient in accurately sensing and managing temperature changes, leading to potential operational failures.
Innovation Solution
A detection circuit comprising a sensing circuit, control circuit, and switching circuit, which generates temperature-dependent voltages to control the charging and discharging of a capacitor, allowing for precise temperature measurement by alternately coupling the capacitor to a voltage supply and ground, thereby reducing delays and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional thermal monitoring systems are used, then temperature monitoring is provided, but the system suffers from operational delays and high power consumption
Solution Approach 1:
The patent implements periodic action by alternately charging and discharging the capacitive element in response to temperature changes. The switching circuit periodically switches between charging the capacitor from the voltage supply and discharging it to ground, creating a pulse-width modulated output signal that encodes temperature information. This periodic operation reduces average power consumption compared to continuous monitoring while maintaining fast response through the capacitive timing mechanism.
2Measurement precision
If conventional thermal monitoring systems are used, then temperature monitoring is provided, but the system suffers from operational delays
Solution Approach 1:
The patent replaces conventional mechanical or continuous analog thermal monitoring mechanisms with a capacitive timing system. The switching circuit uses capacitive charging and discharging time constants to directly encode temperature information in the width of output pulses, eliminating the need for continuous analog signal processing and reducing operational delays while maintaining measurement precision.
3Reliability
If existing thermal monitoring systems are used, then temperature sensing is provided, but the system lacks efficiency in accurately sensing and managing temperature changes
Solution Approach 1:
The patent implements self-service by using the temperature-dependent voltage directly to control the switching of the capacitive element without requiring additional comparison circuits or reference voltage sources. The temperature-sensitive circuitry automatically modulates the charging and discharging cycles based on temperature changes, making the system self-regulating and eliminating the need for external control logic, thereby improving both reliability and efficiency.
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 enables faster and more accurate temperature sensing and monitoring, reducing operational delays and power consumption compared to existing systems, thereby enhancing the reliability of semiconductor devices.
Implementation Method 1
A sensing circuit generates temperature-dependent voltages in response to temperature changes
Implementation Method 2
A capacitive element is alternately charged and discharged to generate an output signal
Data Source
AI summary
A circuit is disclosed that includes a first differential input pair, a second differential input pair, and a capacitive element. The first differential input pair is configured to be activated according to an output of the second differential input pair, and the second differential input pair is configured to be activated according to an output of the first differential input pair. The first differential input pair and the second differential input pair each comprises an input configured to receive an output signal. The capacitive element configured to be charged according to the output of the first differential input pair, and configured to be discharged according to the output of the second differential input pair, in order to generate the output signal.