Charge-Sharing Driving Circuit for Faster Voltage Reversal
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Solution Overview
Problem
Existing charge sharing circuits in driving circuits cause increased power consumption and reduced circuit operation speed due to signals passing through multiple switches during voltage reversal, leading to potential transistor damage.
Innovation Solution
A driving circuit design that includes first and second output stage circuits outputting different polarities, with a charge sharing circuit providing direct charge sharing between output channels, bypassing switching circuits to reduce power consumption and improve speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple transistors are coupled to output channels to protect from voltage crossing damage, then transistor protection is improved, but power consumption increases and circuit operation speed decreases
Solution Approach 1:
The patent introduces a charge sharing circuit as an intermediary component between output channels and transistors. This charge sharing circuit selectively shares charge between output channels, protecting transistors from voltage crossing damage while avoiding the need for multiple transistors per output channel, thus reducing power consumption compared to the conventional approach of coupling each output channel to multiple transistors.
2Reliability
If multiple transistors are coupled to output channels to protect from voltage crossing damage, then transistor protection is improved, but circuit operation speed decreases
Solution Approach 1:
The charge sharing circuit serves as a mediator that enables transistor protection without requiring signals to pass through multiple transistor switches. By sharing charge directly between output channels through this intermediary circuit, the patent maintains faster operation speeds compared to the conventional approach where signals must traverse multiple transistor switches.
3Reliability
If charge sharing is implemented through switching circuits with multiple switches, then transistor protection is achieved, but power dissipation increases
Solution Approach 1:
The charge sharing circuit acts as an intermediary that reduces power dissipation by providing a more efficient charge sharing path. Instead of forcing charge to pass through multiple switching transistors which dissipate energy, the charge sharing circuit provides a dedicated path for charge redistribution between output channels, thereby reducing overall power dissipation while maintaining transistor protection.
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.