Output pole-compensated operational amplifier
AssigneeTexas Instruments Incorporated
InventorsAniruddha Roy, Saurabh Pandey
Life of this patent
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Abstract
A circuit includes a first transconductance stage having an output. The circuit further includes an output transconductance stage, and a first source-degenerated transistor having a first control input and first and second current terminals. The first control input is coupled to the output of the first transconductance stage. The circuit also includes a second transistor having a second control input and third and fourth current terminals. The third current terminal is coupled to the second current terminal and to the output transconductance stage.
Claims20
A circuit, comprising:
- a first transconductance stage coupled to an input node;
- an output transconductance stage;
- and
- a second transconductance stage coupled between the first transconductance stage and the output transconductance stage, the second transconductance stage including a first source-degenerated transistor and a second transistor, wherein a current terminal of the second transistor is directly coupled to a current terminal of the first source-degenerated transistor.
A circuit, comprising:
- a first transconductance stage having an output;
- an output transconductance stage;
- a first source-degenerated transistor having a first control input and a first current terminal, the first control input coupled to the output of the first transconductance stage;
- and
- a second transistor having a second control input and a second current terminal, the second current terminal coupled to the first current terminal and to the output transconductance stage.
A circuit, comprising:
- a first transconductance stage having an output;
- a second transconductance stage having an input and an output, the input of the second transconductance stage coupled to the output of the first transconductance stage, the second transconductance stage including a first source-degenerated transistor having a first control input coupled to the output of the second transconductance stage, the second transconductance stage including a second transistor having a current terminal directly coupled to a current terminal of the first source-degenerated transistor;
- an output transconductance stage;
- and
- a third transconductance stage coupled between the second transconductance stage and the output transconductance stage.
Dependencies are inferred from the claim text.