Polarity Conversion Circuit with PVT Compensation
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Solution Overview
Problem
Conventional polarity conversion circuits lack compensation for Process, Voltage, and Temperature (PVT) variations, leading to improper operation, reduced device lifespan, or damage when batteries with inverted polarities are used in portable electronic devices.
Innovation Solution
A PVT compensated polarity conversion circuit utilizing high voltage switches and delay elements with controllable threshold transmission gates to minimize output voltage variations, ensuring proper operation across different PVT conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional polarity conversion circuits are used, then the circuit can perform basic polarity conversion, but the circuit operation becomes improper and device lifespan shortens under inverted battery conditions due to lack of PVT compensation
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the threshold voltages of transmission gate transistors based on detected PVT conditions. The circuit modifies operating parameters (threshold voltages) to compensate for PVT variations, ensuring reliable polarity conversion across different process corners, voltage levels, and temperatures including inverted battery conditions
2Stability of the object's composition
If threshold voltage adjustment circuits are added to compensate for PVT variations, then output voltage stability improves, but device complexity increases
Solution Approach 1:
The patent implements self-service by using the circuit's own output signals to control the threshold adjustment mechanisms. The polarity conversion circuit automatically detects its operating conditions and self-regulates the transmission gate threshold voltages without requiring external control circuits, thereby improving stability while minimizing added complexity
Solution Approach 2:
The transmission gates serve multiple functions: they perform the primary polarity conversion task while simultaneously acting as the controlled elements whose threshold voltages are adjusted for compensation. This multi-functionality reduces overall circuit complexity by combining the conversion and compensation functions within the same structural elements
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 effectively stabilizes polarity conversion, independent of PVT variations, preventing device damage and ensuring reliable operation by using threshold adjustment circuits and MOS transistors to manage charge transitions.
Implementation Method 1
A PVT compensated polarity conversion circuit utilizing high voltage switches and delay elements with controllable threshold transmission gates to minimize output voltage variations
Data Source
AI summary
Disclosed is a process, voltage and temperature compensated polarity conversion circuit comprising an input signal generator comprising an input signal having a first polarity, a variable frequency generator, a plurality of high voltage differential switches coupled to the variable frequency generator and a controllable threshold transmission gate circuit coupled to the input signal generator, coupled to the variable frequency generator and coupled to the plurality of high voltage differential switches. A method of polarity conversion and other embodiments are also disclosed.