US 7,741,895 B2 · Semiconductor switch circuit having MOS transistors with low current consumption

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 Q101 and Q102 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 Q103 and N-type MOS transistor Q105 having drains connected to the gate of Q101, a P-type MOS transistor Q104 and N-type MOS transistor Q106 having drains connected to the gate of Q102, 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 Q103 and Q104 connected to the sources of Q101 and Q102. 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.

Claims5

Dependent claims

A semiconductor switch circuit comprising:

first and second MOS transistors for conduction that share a source and are connected in series between a first input/output terminal and second input/output terminal;
third and fifth MOS transistors having drains connected to a gate of said first MOS transistor;
fourth and sixth MOS transistors having drains connected to a gate of said second MOS transistor;
and
a control terminal connected, via a common connection, to gates of said third through sixth MOS transistors, wherein:
sources and back gates of said third and fourth MOS transistors have a common connection to sources of said first and second MOS transistors;
and
said gate of said first MOS transistor and said gate of said second MOS transistor are configured for individual control.

5 more elements

Dependencies are inferred from the claim text.

Semiconductor switch circuit having MOS transistors with low current consumption

Life of this patent

Semiconductor switch circuit having MOS transistors with low current consumption

Life of this patent

Abstract

Claims5