US 7,023,258 B2 · Switch circuit

Abstract

A plurality of first transistors are connected in series between the first terminal and the second terminal. A plurality of second transistors are connected in series between the first terminal and the third terminal. One end of a resistor is connected to the first terminal, and the other end of the resistor is grounded. Either the first transistor or the second transistor is controlled to be ON. A resistance value of the resistor is set at such a value that a difference between a gate voltage of the first or second transistor being ON and a pinch-off voltage of the first or second transistor being ON is set greater than the amplitude of the potential of the first terminal which varies upon reception of a signal flowing to the first terminal. In this structure, the first and second transistors are appropriately operated regardless of signal frequency.

Claims4

Dependent claims

A switch circuit comprising:

a first transistor which is connected between a first terminal and a second terminal;
a second transistor which is connected between said first terminal and a third terminal;
and
a resistor one end of which is connected to said first terminal and other end of which is grounded, and
wherein either said first transistor or said second transistor is controlled to be ON, and
said resistor has a resistance value which is set at such a value that a difference between a gate voltage of said first transistor or second transistor being ON and a pinch-off voltage of the first transistor or second transistor being ON is set greater than an amplitude of a potential of said first terminal which varies by a signal flowing to said first terminal.

3 more elements

Dependencies are inferred from the claim text.

Switch circuit

Life of this patent

Switch circuit

Life of this patent

Abstract

Claims4