Clamp-Protected Switch Routing Circuit for Voltage Spike Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing switch devices face challenges in handling high voltage spikes due to signal reflection, leading to increased on-resistance and signal loss, especially when ports are disconnected, and require multiple switching devices in series to handle twice the maximum signal amplitude, which increases device size and complexity.
Innovation Solution
Incorporation of clamp circuits with series-connected diodes to limit voltage differences within specific bounds, reducing the required withstand voltage of through and shunt switches, and arranging ground switching circuits closer to the first port to manage voltage spikes effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If multiple switching devices are connected in series to handle high voltage spikes, then the withstand voltage capability is improved, but the device size and complexity increase
Solution Approach 1:
A clamp circuit is introduced as an intermediary component between the signal line and ground. This clamp circuit captures and dissipates voltage spikes before they can propagate through the switching devices, thereby protecting the switches from high voltage stress without requiring multiple devices in series. The clamp circuit acts as a mediator that absorbs the harmful voltage transients.
Solution Approach 2:
The clamp circuit converts the harmful voltage spikes into a beneficial protective mechanism. By providing a controlled path to ground for voltage transients, the clamp circuit transforms potentially damaging high voltage events into manageable current flows that are safely dissipated, thereby protecting the switching devices without compromising their individual voltage ratings.
2Strength
If multiple switching devices are connected in series to handle high voltage spikes, then the voltage withstand capability is improved, but the on-resistance increases
Solution Approach 1:
The clamp circuit serves as an intermediary that protects individual switching devices from voltage spikes without requiring series connection. Each switch can operate at its optimal low resistance state since the clamp circuit handles the voltage stress, thereby minimizing signal loss while maintaining voltage withstand capability.
Solution Approach 2:
The clamp circuit provides excessive protection by handling not only normal operating voltages but also extreme voltage spikes. This partial action approach allows the switching devices to be oversized for normal operation (lower resistance) while the clamp circuit handles the excess voltage conditions that would otherwise require series connection.
3Reliability
If the ground switching circuit is arranged closer to the first port, then the voltage spike management is improved, but the wiring complexity increases
Solution Approach 1:
The ground switching circuit is positioned closer to the first port to perform preliminary action on voltage spikes before they can propagate further into the system. This early intervention approach allows the clamp circuit to capture transients at their source, improving overall voltage spike management even though it requires careful wiring planning.
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
Reduces the number of switching devices needed, decreases on-resistance, improves signal loss characteristics, and minimizes device size by allowing switches to handle lower voltages, thus optimizing performance and reducing complexity.
Implementation Method 1
clamp circuits with series-connected diodes to limit voltage differences within specific bounds
Implementation Method 2
each of the plurality of clamp circuits may comprise: a plurality of first diodes that are forward connected in series between the corresponding node and the reference potential
Data Source
AI summary
A switch device comprising: a plurality of routing circuits each configured to switch whether to electrically connect between a first port and each of a plurality of second ports; and a plurality of clamp circuits, wherein each of the plurality of routing circuits comprises: a connection switching circuit configured to switch whether to electrically connect between the first port and a corresponding second port among the plurality of second ports; and at least one ground switching circuit configured to switch whether to ground a wiring between the first port and the corresponding second port among the plurality of second ports, and wherein each of the plurality of clamp circuits is electrically connected between a node on a wiring between the corresponding second port among the plurality of second ports and the connection switching circuit of a corresponding routing circuit among the plurality of routing circuits, and a reference potential.