US 12,750,053 B2Granted

Analog switch

AssigneeTexas Instruments Incorporated

InventorsUpasana Bhattacharya, Shishir Goyal

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Abstract

A circuit includes first and second n-type transistors, and first and second p-type transistors. A first terminal of the second n-type transistor is coupled to a second terminal of the first n-type transistor. Control terminals of the first and second n-type transistors are coupled. A first terminal of the first p-type transistor is coupled to a first terminal of the first n-type transistor. A first terminal of the second p-type transistor is coupled to a second terminal of the first p-type transistor. A second terminal of the second p-type transistor is coupled to a second terminal of the second n-type transistor. Control terminals of the first and second p-type transistors are coupled. A control circuit has a first output coupled to the control terminals of the first and second n-type transistors, and a second output coupled to the control terminals of the first and second p-type transistors.

Claims19

Dependent claims

A circuit comprising:

a first n-type transistor having a first terminal, a second terminal, and a control terminal, the first n-type transistor having a first threshold voltage;
a second n-type transistor having a first terminal, a second terminal, and a control terminal, the first terminal of the second n-type transistor coupled to the second terminal of the first n-type transistor, the control terminal of the second n-type transistor coupled to the control terminal of the first n-type transistor, the second n-type transistor having the first threshold voltage;
a first p-type transistor having a first terminal, a second terminal, and a control terminal, the first terminal of the first p-type transistor coupled to the first terminal of the first n-type transistor and the first p-type transistor having a second threshold voltage;
a second p-type transistor having a first terminal, a second terminal, and a control terminal, the first terminal of the second p-type transistor coupled to the second terminal of the first p-type transistor and the second terminal of the second p-type transistor coupled to the second terminal of the second n-type transistor, the control terminal of the second p-type transistor coupled to the control terminal of the first p-type transistor, the second p-type transistor having the second threshold voltage;
and
a control circuit coupled between a first voltage supply terminal and a second voltage supply terminal, the control circuit having a first output and a second output, the first output of the control circuit is coupled to the control terminal of the first n-type transistor and coupled to the control terminal of the second n-type transistor, the second output of the control circuit is coupled to the control terminal of the first p-type transistor and coupled to the control terminal of the second p-type transistor, the control circuit comprising:
a plurality of n-type transistors in series arranged in a diode-connected configuration;
a first resistor coupled between a first voltage supply terminal and a drain terminal of a first n-type transistor of the plurality of n-type transistors;
a second resistor coupled between a source terminal of a last n-type transistor of the plurality of n-type transistors and a second voltage supply terminal;
a third n-type transistor having a drain coupled to the first voltage supply terminal, a control terminal coupled between the first resistor and the plurality of n-type transistors, and a source terminal coupled to the first output of the control circuit;
and
a third resistor coupled between the source terminal of the third n-type transistor and the second voltage supply terminal.

9 more elements

A circuit comprising:

a first n-type transistor having a first terminal, a second terminal, and a control terminal, the first n-type transistor having a first threshold voltage;
a second n-type transistor having a first terminal, a second terminal, and a control terminal, the first terminal of the second n-type transistor coupled to the second terminal of the first n-type transistor, the control terminal of the second n-type transistor coupled to the control terminal of the first n-type transistor, the second n-type transistor having the first threshold voltage;
a first p-type transistor having a first terminal, a second terminal, and a control terminal, the first terminal of the first p-type transistor coupled to the first terminal of the first n-type transistor and the first p-type transistor having a second threshold voltage;
a second p-type transistor having a first terminal, a second terminal, and a control terminal, the first terminal of the second p-type transistor coupled to the second terminal of the first p-type transistor and the second terminal of the second p-type transistor coupled to the second terminal of the second n-type transistor, the control terminal of the second p-type transistor coupled to the control terminal of the first p-type transistor, the second p-type transistor having the second threshold voltage;
and
a control circuit coupled between a first voltage supply terminal and a second voltage supply terminal, the control circuit having a first output and a second output, the first output of the control circuit is coupled to the control terminal of the first n-type transistor and coupled to the control terminal of the second n-type transistor, the second output of the control circuit is coupled to the control terminal of the first p-type transistor and coupled to the control terminal of the second p-type transistor, the control circuit comprising:
a plurality of p-type transistors in series arranged in a diode-connected configuration;
a first resistor coupled between a second voltage supply terminal and a drain terminal of a first p-type transistor of the plurality of p-type transistors;
a second resistor coupled between a source terminal of a last p-type transistor of the plurality of p-type transistors and a first voltage supply terminal;
a third p-type transistor having a drain coupled to the second voltage supply terminal, the third p-type transistor having a control terminal coupled between the first resistor and the plurality of p-type transistors, and the third p-type transistor having a source terminal coupled to second output of the control circuit;
and
a third resistor coupled between the source terminal of the third p-type transistor and the first voltage supply terminal.

9 more elements

A circuit comprising:

a first n-type transistor having a first terminal, a second terminal, and a control terminal, the first n-type transistor having a first threshold voltage;
a second n-type transistor having a first terminal, a second terminal, and a control terminal, the first terminal of the second n-type transistor coupled to the second terminal of the first n-type transistor, the control terminal of the second n-type transistor coupled to the control terminal of the first n-type transistor, the second n-type transistor having the first threshold voltage;
a first p-type transistor having a first terminal, a second terminal, and a control terminal, the first terminal of the first p-type transistor coupled to the first terminal of the first n-type transistor and the first p-type transistor having a second threshold voltage;
a second p-type transistor having a first terminal, a second terminal, and a control terminal, the first terminal of the second p-type transistor coupled to the second terminal of the first p-type transistor and the second terminal of the second p-type transistor coupled to the second terminal of the second n-type transistor, the control terminal of the second p-type transistor coupled to the control terminal of the first p-type transistor, the second p-type transistor having the second threshold voltage;
and
a control circuit coupled between a first voltage supply terminal and a second voltage supply terminal, the control circuit having a first output and a second output, the first output of the control circuit is coupled to the control terminal of the first n-type transistor and coupled to the control terminal of the second n-type transistor, the second output of the control circuit is coupled to the control terminal of the first p-type transistor and coupled to the control terminal of the second p-type transistor, the control circuit comprising:
a fourth n-type transistor having a drain coupled to the first voltage supply terminal, the fourth n-type transistor having a source coupled to the first output of the control circuit;
and
third resistor coupled between the first output of the control circuit and the second voltage supply terminal;
and
a fourth resistor coupled between the first voltage supply terminal and a control terminal of the fourth n-type transistor.

8 more elements

A circuit comprising:

a first n-type transistor having a first terminal, a second terminal, and a control terminal, the first n-type transistor having a first threshold voltage;
a second n-type transistor having a first terminal, a second terminal, and a control terminal, the first terminal of the second n-type transistor coupled to the second terminal of the first n-type transistor, the control terminal of the second n-type transistor coupled to the control terminal of the first n-type transistor, the second n-type transistor having the first threshold voltage;
a first p-type transistor having a first terminal, a second terminal, and a control terminal, the first terminal of the first p-type transistor coupled to the first terminal of the first n-type transistor and the first p-type transistor having a second threshold voltage;
a second p-type transistor having a first terminal, a second terminal, and a control terminal, the first terminal of the second p-type transistor coupled to the second terminal of the first p-type transistor and the second terminal of the second p-type transistor coupled to the second terminal of the second n-type transistor, the control terminal of the second p-type transistor coupled to the control terminal of the first p-type transistor, the second p-type transistor having the second threshold voltage;
and
a control circuit coupled between a first voltage supply terminal and a second voltage supply terminal, the control circuit having a first output and a second output, the first output of the control circuit is coupled to the control terminal of the first n-type transistor and coupled to the control terminal of the second n-type transistor, the second output of the control circuit is coupled to the control terminal of the first p-type transistor and coupled to the control terminal of the second p-type transistor, the control circuit comprising:
a fourth p-type transistor having a drain coupled to the second voltage supply terminal, the fourth p-type transistor having a source coupled to the second output of the control circuit;
and
a third resistor coupled between the first voltage supply terminal and the second output of the control circuit;
and
a fourth resistor coupled between the second voltage supply terminal and a control terminal of the fourth p-type transistor.

8 more elements

A circuit comprising:

a first n-type transistor having a first terminal, a second terminal, and a control terminal, the first n-type transistor having a first threshold voltage;
a second n-type transistor having a first terminal, a second terminal, and a control terminal, the first terminal of the second n-type transistor coupled to the second terminal of the first n-type transistor, the control terminal of the second n-type transistor coupled to the control terminal of the first n-type transistor, the second n-type transistor having the first threshold voltage;
a first p-type transistor having a first terminal, a second terminal, and a control terminal, the first terminal of the first p-type transistor coupled to the first terminal of the first n-type transistor and the first p-type transistor having a second threshold voltage;
a second p-type transistor having a first terminal, a second terminal, and a control terminal, the first terminal of the second p-type transistor coupled to the second terminal of the first p-type transistor and the second terminal of the second p-type transistor coupled to the second terminal of the second n-type transistor, the control terminal of the second p-type transistor coupled to the control terminal of the first p-type transistor, the second p-type transistor having the second threshold voltage;
and
a control circuit coupled between a first voltage supply terminal and a second voltage supply terminal, the control circuit having a first output and a second output, the first output of the control circuit is coupled to the control terminal of the first n-type transistor and coupled to the control terminal of the second n-type transistor, the second output of the control circuit is coupled to the control terminal of the first p-type transistor and coupled to the control terminal of the second p-type transistor, the control circuit comprising:
a plurality of n-type transistors in series arranged in a first diode-connected configuration;
a first resistor coupled between a first voltage supply terminal and a drain terminal of a first n-type transistor of the plurality of n-type transistors;
a second resistor coupled between a source terminal of a last n-type transistor of the plurality of n-type transistors and a second voltage supply terminal;
a third n-type transistor having a drain coupled to the first voltage supply terminal, the third n-type transistor having a control terminal coupled between the first resistor and the plurality of n-type transistors, and the third n-type transistor having a source terminal coupled to the first output of the control circuit;
a third resistor coupled between the source terminal of the third n-type transistor and the second voltage supply terminal;
a fourth n-type transistor having a drain coupled to the first voltage supply terminal, the fourth n-type transistor having a source coupled to the first output of the control circuit;
and
a fourth resistor coupled between the first voltage supply terminal and a control terminal of the fourth n-type transistor;
a plurality of p-type transistors in series arranged in a second diode-connected configuration;
a fifth resistor coupled between a second voltage supply terminal and a drain terminal of a first p-type transistor of the plurality of p-type transistors;
a sixth resistor coupled between a source terminal of a last p-type transistor of the plurality of p-type transistors and a first voltage supply terminal;
a third p-type transistor having a drain coupled to the second voltage supply terminal, the third p-type transistor having a control terminal coupled between the first resistor and the plurality of p-type transistors, and the third p-type transistor having a source terminal coupled to second output of the control circuit;
a seventh resistor coupled between the first output of the control circuit and the second voltage supply terminal;
a fourth p-type transistor having a drain coupled to the second voltage supply terminal, the fourth p-type transistor having a source coupled to the second output of the control circuit;
and
a eighth resistor coupled between the second voltage supply terminal and a control terminal of the fourth p-type transistor.

19 more elements

Dependencies are inferred from the claim text.