US 2003/0116780 A1 · Field effect transistor switch circuit

Abstract

In order that the DC potential of the input terminal does not rise, whereby ON/OFF switching is accordingly performed normally, even when a signal having a large amplitude is inputted to an input terminal, thereby the depletion layer expands due to electron trapping effect, a first field effect transistor is connected between a first switch input terminal and a first switch output terminal in a manner that the source is arranged on the first switch input terminal side, a second field effect transistor is connected between the first switch output terminal and a second switch input terminal in a manner that the source is arranged on the second switch input terminal side, a third field effect transistor is connected between the second switch input terminal and a second switch output terminal in a manner that the source is arranged on the second switch input terminal side, and a fourth field effect transistor is connected between the second switch output terminal and the first switch input terminal in a manner that the source is arranged on the first switch input terminal side. Further, each of first through fourth resistors is connected between the gate and the source of each of the first through fourth field effect transistors.

Claims30

Dependent claims

A field effect transistor switch circuit comprising:

first, second, and third switch terminals;
a first field effect transistor a pair of the main electrodes of which are connected respectively to said first switch terminal and said second switch terminal;
a second field effect transistor a pair of the main electrodes of which are connected respectively to said first switch terminal and said third switch terminal;
a first resistor connected between the control electrode and any one of a pair of said main electrodes of said first field effect transistor;
and
a second resistor connected between the control electrode and any one of a pair of said main electrodes of said second field effect transistor.

3 more elements

A field effect transistor switch circuit comprising:

first, second, third, and fourth switch terminals;
a first field effect transistor a pair of the main electrodes of which are connected respectively to said first switch terminal and said second switch terminal;
a second field effect transistor a pair of the main electrodes of which are connected respectively to said second switch terminal and said third switch terminal;
a third field effect transistor a pair of the main electrodes of which are connected respectively to said third switch terminal and said fourth switch terminal;
a fourth field effect transistor a pair of the main electrodes of which are connected respectively to said fourth switch terminal and said first switch terminal;
a first resistor connected between the control electrode and any one of a pair of said main electrodes of said first field effect transistor;
a second resistor connected between the control electrode and any one of a pair of said main electrodes of said second field effect transistor;
a third resistor connected between the control electrode and any one of a pair of said main electrodes of said third field effect transistor;
and
a fourth resistor connected between the control electrode and any one of a pair of said main electrodes of said fourth field effect transistor.

7 more elements

A field effect transistor switch circuit comprising:

first, second, third, and fourth switch terminals;
a first field effect transistor a pair of the main electrodes of which are connected respectively to said first switch terminal and said second switch terminal;
a second field effect transistor a pair of the main electrodes of which are connected respectively to said second switch terminal and said third switch terminal;
a third field effect transistor a pair of the main electrodes of which are connected respectively to said third switch terminal and said fourth switch terminal;
a fourth field effect transistor a pair of the main electrodes of which are connected respectively to said fourth switch terminal and said first switch terminal;
a first correction capacitance which is connected between the control electrode and any one of a pair of the main electrodes of said first field effect transistor and thereby corrects unbalance of equivalent capacitances between the control electrode and each of a pair of the main electrodes of said first field effect transistor during the OFF state of said first field effect transistor;
a second correction capacitance which is connected between the control electrode and any one of a pair of the main electrodes of said second field effect transistor and thereby corrects unbalance of equivalent capacitances between the control electrode and each of a pair of the main electrodes of said second field effect transistor during the OFF state of said second field effect transistor;
a third correction capacitance which is connected between the control electrode and any one of a pair of the main electrodes of said third field effect transistor and thereby corrects unbalance of equivalent capacitances between the control electrode and each of a pair of the main electrodes of said third field effect transistor during the OFF state of said third field effect transistor;
and
a fourth correction capacitance which is connected between the control electrode and any one of a pair of the main electrodes of said fourth field effect transistor and thereby corrects unbalance of equivalent capacitances between the control electrode and each of a pair of the main electrodes of said fourth field effect transistor during the OFF state of said fourth field effect transistor.

7 more elements

Dependencies are inferred from the claim text.

Field effect transistor switch circuit

Life of this patent

Field effect transistor switch circuit

Life of this patent

Abstract

Claims30