Extremely linear, high speed, class AB rail to rail bipolar amplifier output stage with high output drive
AssigneeTexas Instruments Incorporated
InventorsPriscilla Escobar-Bowser, Maria F. Carreto
Life of this patent
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Abstract
The amplifier output stage circuit includes: a translinear loop 30 having first and second input nodes Vin+ and Vin−; a first transistor Q7 coupled between a first output node of the translinear loop 30 and a first supply node V+; a first output transistor Q9 coupled between an output node 36 of the circuit and the first supply node V+, and having a base coupled to a base of the first transistor Q7; a second transistor Q10 coupled between a second output node of the translinear loop 30 and a second supply node V−; a second output transistor Q12 coupled between the output node 36 of the circuit and the second supply node V−, and having a base coupled to a base of the second transistor Q10.
Claims12
A circuit comprising:
- a translinear loop having first and second input nodes;
- a first transistor coupled between a first output node of the translinear loop and a first supply node;
- a first output transistor coupled between an output node of the circuit and the first supply node, and having a base coupled to a base of the first transistor;
- a second transistor coupled between a second output node of the translinear loop and a second supply node;
- a second output transistor coupled between the output node of the circuit and the second supply node, and having a base coupled to a base of the second transistor;
- a first resistor coupled between an emitter of the first transistor and the first supply node;
- and
- a second resistor coupled between an emitter of the second transistor and the second supply node.
Dependencies are inferred from the claim text.