Programmable Logic Device Switch Circuit with Multi-Layer Wiring
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Solution Overview
Problem
Current programmable logic devices face challenges in reducing layout area and power consumption while preventing flow-through currents and maintaining reliable electrical connections, especially in dynamic multi-context reconfiguration scenarios.
Innovation Solution
The semiconductor device incorporates a switch circuit with multiple wiring layers and transistors, including oxide semiconductor films, to control electrical connections between programmable logic elements, using a specific timing and potential scheme to manage conduction states and reduce power consumption, thereby minimizing layout area and preventing flow-through currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple switches and wiring layers are used to control electrical connections between programmable logic elements, then the reliability of electrical connections and prevention of flow-through currents is improved, but the layout area and device complexity increase
Solution Approach 1:
The patent employs multiple wiring layers stacked vertically to establish electrical connections between programmable logic elements. By transitioning from a planar two-dimensional layout to a three-dimensional multi-layer architecture, the device achieves improved connection reliability and flow-through current prevention without proportionally increasing the footprint area. The wiring layers are arranged in different vertical levels, allowing complex interconnections to be achieved within a compact planar footprint.
Solution Approach 2:
The patent divides the wiring system into multiple segmented layers, with each layer serving specific connection functions. The first wiring layer handles certain signal routes while the second wiring layer handles other routes, and switches are distributed across different layers to control conduction independently. This segmentation allows precise control of electrical connections and prevents unwanted flow-through currents by isolating conduction paths in different spatial segments.
2Reliability
If multiple switches and wiring layers are used to control electrical connections between programmable logic elements, then the reliability of electrical connections is improved, but the device complexity increases
Solution Approach 1:
The patent designs switches that can operate across multiple wiring layers and serve multiple functions. Each switch is capable of controlling conduction between different wiring layers and can be programmed to implement various logic functions. This multi-functionality reduces the need for dedicated switches for each specific connection, thereby managing device complexity while maintaining high connection reliability through the multi-layer architecture.
Solution Approach 2:
The patent implements dynamically controllable switches that can change their conduction state based on programming inputs. The switches are not fixed in their connection topology but can be reconfigured to establish different electrical paths as needed. This dynamic control allows the same physical switch structure to serve multiple logical functions, reducing overall device complexity while maintaining reliability through flexible connection management.
3Use of energy by moving object
If a specific timing and potential scheme is used to manage conduction states, then power consumption is reduced, but the control circuit complexity increases
Solution Approach 1:
The patent employs periodic timing schemes where switches are activated only during specific time periods when data transmission is required. During non-active periods, switches remain in an off state to minimize power consumption. The control circuit generates periodic control signals that synchronize switch activation with data transfer operations, creating a rhythm of active and idle states that reduces average power consumption while managing control complexity through systematic timing control.
Solution Approach 2:
The patent applies different potential levels to different wiring layers and switch nodes based on their specific functional requirements. Rather than using a uniform potential scheme across the entire device, the control circuit provides localized potential control tailored to each switch's position and function. This local quality approach optimizes power consumption by applying voltage only where and when needed, while the increased control circuit complexity is justified by the targeted efficiency gains in specific regions.
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
This approach enables a downsized programmable logic device with reduced power consumption and reliable electrical connections, allowing for high-speed reconfiguration without the need for sense amplifiers, thus enhancing the device's efficiency and reliability.
Implementation Method 1
a first switch, a second switch, a third switch, and a fourth switch. The first switch has a function of controlling conduction between the first wiring and a control terminal of the second switch
Data Source
AI summary
A novel programmable logic device is provided. Programmable switches each include a first transistor and a second transistor. The first transistor in a first programmable switch controls conduction between a first wiring and a gate of the second transistor in the first programmable switch. The second transistor in the first programmable switch controls conduction between the first wiring and a second wiring. The first transistor in the second programmable switch controls conduction between another first wiring and a gate of the second transistor in the second programmable switch.