Switching Module for Multi-Voltage Power Supply Leakage
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Solution Overview
Problem
Conventional switches struggle to fully turn on or off when switching between power sources with different voltage levels, leading to potential current leakage.
Innovation Solution
A switching module with switches controlled by signals of either ground voltage or max voltage, ensuring full switching by using a max voltage generator and level shifting modules to manage power supply from multiple power sources with varying voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional switches are used to selectively supply power from multiple power sources with different voltage levels, then power supply switching is achieved, but the switches cannot fully turn on and/or fully turn off during operation, leading to current leakage
Solution Approach 1:
The patent changes the voltage parameter of the switching signal to match the highest voltage among all power sources. By generating a switching signal with voltage equal to the maximum power source voltage (rather than a fixed conventional voltage), the switch can achieve complete turn-off even when dealing with power sources of different voltage levels, thereby preventing current leakage while maintaining reliable switching operation.
2Adaptability or versatility
If switches are used to govern power supply from different voltage levels, then selective power supply to functional blocks is achieved, but full switching off cannot be accomplished when voltage levels differ
Solution Approach 1:
The switching signal voltage parameter is dynamically adjusted to correspond to the highest voltage among all connected power sources. This parameter change enables the switch to reliably cut off power from any power source regardless of its voltage level, ensuring both adaptability to multiple voltage sources and complete switching reliability without residual current flow.
Data Source
AI summary
Some of the embodiments of the present disclosure provide a system comprising a functional block; a plurality of power sources, each of the plurality of power sources being maintained at a corresponding voltage; and a switching module having a plurality of switches, the switching module configured to supply power from at least one of the plurality of power sources to the functional block, each of the plurality of switches being controlled by a corresponding switching signal having a voltage value that is one of (i) a ground voltage and (ii) a high max voltage, the high max voltage corresponding to a highest voltage among the voltages of the plurality of power sources. Other embodiments are also described and claimed.