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US 11,336,244 B2Granted
Fully differential rail-to-rail output amplifier with inverter-based input pair
AssigneeBrookhaven Science Associates, LLC
InventorMieczyslaw M. Dabrowski
Life of this patent
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Abstract
A fully differential rail-to-rail-output amplifier includes a differential input inverter pair, folded cascode pair, class AB control pair, and class AB output rail-to-rail pair. A drain associated with the folded cascode pair is operatively coupled to the class AB control pair, and the drain associated with the folded cascode pair is unconnected to the current source associated with the class AB control pair. A method of providing fully differential rail-to-rail-output amplification includes coupling a folded cascode pair operatively to a differential input inverter pair, coupling a drain associated with the folded cascode pair operatively to a class AB control pair, and coupling a class AB output rail-to-rail pair operatively to the class AB control pair.
Claims19
A fully differential rail-to-rail-output amplifier, which comprises:
- a differential input inverter pair, the differential input inverter pair comprising at least one of an n-type channel metal-oxide semiconductor (NMOS) transistor and p-type channel metal-oxide semiconductor (PMOS) transistor and comprising bottom current source and top current source;
- a folded cascode pair, the folded cascode pair comprising at least one of a NMOS transistor and PMOS transistor, the folded cascode pair operatively coupled to the differential input inverter pair;
- a class AB control pair, the class AB control pair comprising at least one of a NMOS transistor, PMOS transistor, and current source, a drain of the NMOS transistor or the PMOS transistor associated with the folded cascode pair operatively coupled to the class AB control pair, the drain of the NMOS transistor or the PMOS transistor associated with the folded cascode pair being unconnected to the current source associated with the class AB control pair;
- and
- a class AB output rail-to-rail pair, the class AB output rail-to-rail pair comprising at least one of a NMOS transistor and PMOS transistor, the class AB output rail-to-rail pair operatively coupled to the class AB control pair,
- wherein the differential input inverter pair comprises at least two NMOS transistors and at least two PMOS transistors, sources of the PMOS transistors associated with the differential input inverter pair operatively coupled to the top current source, the top current source operatively coupled to a power supply, sources of the NMOS transistors associated with the differential input inverter pair operatively coupled to the bottom current source, the bottom current source operatively coupled to ground, drains of the PMOS transistors associated with the differential input inverter pair and drains of the NMOS transistors associated with the differential input inverter pair operatively coupled to the folded cascode pair, gates of at least one of the PMOS transistors associated with the differential input inverter pair and at least one of the NMOS transistors associated with the differential input inverter pair operatively coupled together.
3 more elements
A method of providing fully differential rail-to-rail-output amplification, which comprises:
- coupling a folded cascode pair operatively to a differential input inverter pair, the folded cascode pair comprising at least one of a n-type channel metal oxide semiconductor (NMOS) transistor and p-type channel metal oxide semiconductor (PMOS) transistor, the differential input inverter pair comprising at least one of a NMOS transistor and PMOS transistor and comprising bottom current source and top current source;
- coupling a drain of the NMOS transistor or the PMOS transistor associated with the folded cascode pair operatively to a class AB control pair, the drain of the NMOS transistor or the PMOS transistor associated with the folded cascode pair being unconnected to a current source associated with the class AB control pair, the class AB control pair comprising at least one of a NMOS transistor, PMOS transistor, and current source;
- and
- coupling a class AB output rail-to-rail pair operatively to the class AB control pair, the class AB output rail-to-rail pair comprising at least one of a NMOS transistor and PMOS transistor,
- wherein the differential input inverter pair comprises at least two NMOS transistors and at least two PMOS transistors, sources of the PMOS transistors associated with the differential input inverter pair operatively coupled to the top current source, the top current source operatively coupled to a power supply, sources of the NMOS transistors associated with the differential input inverter pair operatively coupled to the bottom current source, the bottom current source operatively coupled to ground, drains of the PMOS transistors associated with the differential input inverter pair and drains of the NMOS transistors associated with the differential input inverter pair operatively coupled to the folded cascode pair, gates of at least one of the PMOS transistors associated with the differential input inverter pair and at least one of the NMOS transistors associated with the differential input inverter pair operatively coupled together.
2 more elements
Dependencies are inferred from the claim text.