Charge-Sharing Driving Circuit With Direct Output-Channel Path
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Solution Overview
Problem
Existing driving circuits that protect transistors in charge sharing circuits from voltage reversal damage by coupling output channels to multiple transistors increase power consumption and reduce circuit speed due to signal passage through multiple switches.
Innovation Solution
A driving circuit design that includes a charge sharing circuit with switches and output stage circuits, where the charge sharing circuit is selectively turned on to provide charge sharing between output channels without going through switching circuits, reducing power consumption and improving speed by eliminating parasitic resistance and capacitance in the transmission path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If output channels are coupled to multiple transistors to protect from voltage reversal damage, then transistor protection is improved, but power consumption increases and circuit operation speed decreases
Solution Approach 1:
The charge sharing circuit is segmented into dedicated charge sharing switches that operate independently from the main switching circuit. This segmentation allows charge sharing to occur through direct connections between output channels, bypassing the need for signal passage through multiple switches and reducing power consumption while maintaining transistor protection.
Solution Approach 2:
Dedicated charge sharing switches act as intermediaries that facilitate charge sharing between output channels without requiring the signal to pass through the main switching circuit. These intermediary switches provide a direct path for charge sharing, eliminating the need for multiple switch passages and reducing both power consumption and operation delay.
2Reliability
If output channels are coupled to multiple transistors to protect from voltage reversal damage, then transistor protection is improved, but circuit operation speed decreases
Solution Approach 1:
The circuit is segmented into distinct charge sharing paths that are independent from the main switching paths. This segmentation enables charge sharing to occur through direct connections, avoiding the need for signal passage through multiple switches and eliminating the associated operation delay, thus improving circuit speed while maintaining protection.
Solution Approach 2:
Dedicated charge sharing switches serve as intermediaries that provide a direct pathway for charge sharing between output channels. This intermediary mechanism eliminates the need for the signal to traverse multiple switches, thereby reducing operation delay and improving overall circuit speed while still providing necessary transistor protection.
3Reliability
If charge sharing circuit includes switching circuits, then transistor protection is improved, but parasitic resistance and capacitance increase
Solution Approach 1:
The charge sharing function is segmented from the main switching circuit, creating dedicated charge sharing paths with minimal components. This segmentation eliminates unnecessary switching circuits from the charge sharing path, reducing parasitic resistance and capacitance while maintaining transistor protection through the dedicated charge sharing switches.
Solution Approach 2:
Dedicated charge sharing switches act as simple intermediaries that provide direct charge sharing paths without the complexity of full switching circuits. This intermediary approach minimizes the number of components in the charge sharing path, thereby reducing parasitic resistance and capacitance while still achieving the protection function.
Data Source
AI summary
A driving circuit is provided, including first to second output stage circuits that output, respectively, first and second voltages of a first polarity. The driving circuit further includes a first switch having a first terminal receiving the first voltage from the first output stage circuit and a second terminal coupled to a first output channel through a switching circuit, and a second switch having a first terminal receiving the second voltage from the second output stage circuit and a second terminal coupled to a second output channel through the switching circuit. The driving circuit further includes a first charge sharing circuit having a first terminal coupled to the first output channel and a second terminal coupled to the second output channel. The first charge sharing circuit is turned on to provide charge sharing between the first output channel and the second output channel.