Bidirectional Voltage Translation With Dynamic One-Shot Pulse Width
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Solution Overview
Problem
Conventional bidirectional voltage translators malfunction when the duration of a voltage signal is less than the fixed pulse width of the one-shot pulse, leading to incorrect level shifting of signals across different voltage domains.
Innovation Solution
Incorporating one-shot circuits that generate pulse signals based on the duration of voltage transitions, allowing the driver signals to adjust their pulse width accordingly to match the duration of the voltage signals, ensuring accurate level shifting regardless of signal frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed pulse width one-shot circuit is used, then the circuit structure is simple, but the voltage translator malfunctions when the signal duration is less than the fixed pulse width
Solution Approach 1:
The patent applies the dynamics principle by making the one-shot pulse width dynamic rather than fixed. The pulse width is adjusted based on the duration of the input voltage signal, allowing the circuit to adapt to different signal frequencies. This is achieved through a control circuit that monitors the input signal duration and dynamically adjusts the one-shot pulse width accordingly, preventing malfunction while maintaining operational reliability across various signal conditions.
Solution Approach 2:
The patent applies the parameter changes principle by modifying the pulse width parameter of the one-shot circuit based on the input signal characteristics. Instead of using a fixed pulse width, the circuit changes the pulse width parameter dynamically to match the signal duration, ensuring proper operation for both low-frequency and high-frequency signals without requiring separate translator circuits.
2Reliability
If separate voltage translators are used for low-frequency and high-frequency signals, then signal translation accuracy is improved, but device complexity and testing costs increase
Solution Approach 1:
The patent applies the universality principle by designing a single voltage translator circuit that can handle both low-frequency and high-frequency signals. The circuit incorporates a control mechanism that automatically adapts its operation based on the input signal frequency, eliminating the need for separate dedicated translators for different frequency ranges. This multi-functional approach maintains translation accuracy while reducing overall system complexity and testing requirements.
Solution Approach 2:
The patent uses dynamics to enable a single translator circuit to adapt its behavior dynamically based on the input signal characteristics. The circuit automatically adjusts its internal parameters, particularly the one-shot pulse width, in response to different signal frequencies, allowing one universal translator to replace multiple frequency-specific translators while maintaining accurate signal translation across all frequency ranges.
Data Source
AI summary
A voltage translator having first and second one-shots shifts a voltage level of a first voltage signal to generate a second voltage signal, and vice-versa. The first one-shot generates a first driver signal when the first voltage signal goes from low to high based on a time duration for which the first voltage signal remains high. The second voltage signal is generated based on the first driver signal. Similarly, the second one-shot generates the first voltage signal when the second voltage signal goes from a low to high based on a time duration for which the second voltage signal remains high.