Semiconductor Switch Circuit for Low Power Consumption
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Summary
Problems
Conventional semiconductor switch circuits experience high current consumption due to the need for a current flow to establish conduction, leading to excess leakage current and increased power consumption.
Innovation solutions
A semiconductor switch circuit configuration featuring first and second MOS transistors sharing a source and connected in series between input/output terminals, with third and fifth MOS transistors having drains connected to the gate of the first MOS transistor and fourth and sixth MOS transistors having drains connected to the gate of the second MOS transistor, along with a control terminal connected to the gates of these MOS transistors, where the sources and back gates of the third and fourth MOS transistors are connected to the sources of the first and second MOS transistors, allowing for voltage-controlled switching between conduction and non-conduction states.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If a conventional semiconductor switch circuit uses a current mirror circuit to control conduction state, then the switching control function is achieved, but current consumption increases due to necessary current flow through the control path
Why choose this principle:
The patent replaces the conventional current mirror circuit (which requires continuous current flow) with a voltage-controlled switching mechanism using MOS transistors. The control signal applied to the gate terminal creates an electric field that controls the conduction state without requiring continuous current flow through the control path, thus substituting a current-based control system with a voltage-based control system that consumes less power.
Principle concept:
If a conventional semiconductor switch circuit uses a current mirror circuit to control conduction state, then the switching control function is achieved, but current consumption increases due to necessary current flow through the control path
Why choose this principle:
The patent changes the control parameter from current (in conventional current mirror circuits) to voltage (in the MOS transistor gate control). By applying a voltage signal to the gate terminal, the transistor's conduction state is controlled through electric field effects rather than current flow, fundamentally changing the control mechanism to reduce power consumption while maintaining reliable switching function.
Application Domain
Data Source
AI summary:
A semiconductor switch circuit configuration featuring first and second MOS transistors sharing a source and connected in series between input/output terminals, with third and fifth MOS transistors having drains connected to the gate of the first MOS transistor and fourth and sixth MOS transistors having drains connected to the gate of the second MOS transistor, along with a control terminal connected to the gates of these MOS transistors, where the sources and back gates of the third and fourth MOS transistors are connected to the sources of the first and second MOS transistors, allowing for voltage-controlled switching between conduction and non-conduction states.
Abstract
A semiconductor switch circuit is provided that enables current consumption to be reduced even in a conduction state. A semiconductor switch circuit 100 has P-type MOS transistors Q 101 and Q 102 for conduction that share a source and are connected in series between an input/output terminal 101 and input/output terminal 102 , a P-type MOS transistor Q 103 and N-type MOS transistor Q 105 having drains connected to the gate of Q 101 , a P-type MOS transistor Q 104 and N-type MOS transistor Q 106 having drains connected to the gate of Q 102 , and a control terminal 103 connected to the gates of the transistors. Further semiconductor switch circuit 100 is configured with the sources and back gates of Q 103 and Q 104 connected to the sources of Q 101 and Q 102 . Therefore, it is possible to switch the path between input/output terminal 101 and input/output terminal 102 between a conduction state and non-conduction state by means of voltage control by voltage value Vcont of a control signal applied to control terminal 103.