Pulse Signal Transmission Circuit for Multi-Switch Driver Synchronization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing signal transmission devices for semiconductor switches face challenges in efficiently driving high voltage semiconductor switching elements, particularly in managing pulse signals and selector signals to synchronize with voltage level changes, leading to increased circuit complexity and manufacturing costs.
Innovation Solution
A signal transmission device with a pulse generator, output circuit, and detector that generates and transmits set and reset pulse signals based on predetermined periods, adjusting the phase of these signals according to the selector signal's voltage level, allowing the detector to instruct the switch circuit to connect the output terminal to the appropriate driver for driving semiconductor switching elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate driver circuits are provided for each semiconductor switching element, then each element can be driven independently, but the total number of components and circuit complexity increases
Solution Approach 1:
The patent employs a single driver circuit that can selectively drive multiple semiconductor switching elements through a selector signal. The driver circuit is designed to handle both PWM signals and selector signals, allowing it to function as a universal driver for different switching elements (e.g., first and second semiconductor switching elements) without requiring separate dedicated drivers for each element.
Solution Approach 2:
The patent combines multiple driving functions into a single integrated driver circuit. By merging the driving capabilities for multiple switching elements into one circuit block, the total component count is reduced while maintaining the ability to independently control each switching element through signal multiplexing.
2Device complexity
If a single driver circuit drives multiple semiconductor switching elements, then component count is reduced, but synchronization with voltage level changes becomes more difficult
Solution Approach 1:
The patent incorporates a detector that monitors the PWM signal and generates detection signals based on the voltage level changes of the PWM signal. This feedback mechanism ensures that the driver circuit can accurately synchronize its output with the input signal transitions, maintaining reliable operation even when driving multiple switching elements with a single circuit.
Solution Approach 2:
The detector circuit preliminarily processes the PWM signal by detecting voltage level changes and generating corresponding detection signals before they reach the driver circuit. This preliminary action prepares the synchronization information in advance, allowing the driver circuit to respond accurately and timely to voltage level changes without delay or error.
3Manufacturing precision
If pulse signals are generated for each switching element, then precise control is achieved, but the number of pulse signals and circuit complexity increases
Solution Approach 1:
The patent uses periodic pulse signal generation based on the PWM signal period. The detector generates detection signals at specific periods of the PWM signal (at rising and falling edges), and the driver circuit uses these periodic signals to control the switching elements. This approach maintains precise control timing while reducing the total number of independent pulse signals needed.
Solution Approach 2:
The patent implements dynamic pulse signal generation where the timing and generation of pulse signals adapt based on the PWM signal characteristics and selector signal state. The driver circuit dynamically adjusts which switching element to drive and when, based on real-time signal conditions, rather than using fixed predetermined pulse signals for each element.
Data Source
AI summary
In a signal transmission device having a pulse generator, a RS F/F circuit and a detector, the generator generates a set pulse signal and/or a reset pulse signal when a state of a PWM signal is changed. After the generation of the set pulse signal, the generator continuously generates following pulse signals after elapse of a predetermined period of time counted from the generation of the set pulse signal. The generator adjusts, based on a selector signal, the predetermined period of time counted to a time when the following pulse signal is transmitted at a first time. The detector detects the state of the selector signal based on the predetermined period of time counted from a time when the RS F/F circuit receives the set pulse signal or the reset pulse signal to a time when receiving the following pulse signal at a first time.