Back to results
US 2010/0201446 A1Published application
Class AB Output Stage
AssigneeInfineon Technologies AG
InventorDieter Draxelmayr
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to a class AB amplifier output stage.
Claims24
An apparatus comprising:
- a first current mirror arrangement coupled to a first input signal arrangement, the first input signal arrangement comprising a first input current source and a first impedance;
- and
- a second current mirror arrangement coupled to a second input signal arrangement, the second input signal arrangement comprising a second input current source and a second impedance, and wherein the second current mirror arrangement is coupled to the first current mirror arrangement.
An apparatus comprising:
- a first operational transconductance amplifier including an output node coupled to a first variable current source, the first operational transconductance amplifier to determine a voltage drop of a first impedance;
- and
- a second operational transconductance amplifier including an output node coupled to a second variable current source, the second operational transconductance amplifier to determine a voltage drop of a second impedance and wherein the output node of the second operational transconductance amplifier is coupled to the output node of the first operational transconductance amplifier.
An apparatus comprising:
- a differential amplifier arrangement coupled to a first impedance of a class AB output stage and coupled to a second impedance of a class AB output stage, wherein an output node of the differential amplifier arrangement is coupled to a variable current source arrangement and one or more input nodes of the differential amplifier arrangement are coupled to the first impedance and the second impedance.
A method comprising:
- generating an output signal of a first amplifier circuit based on a voltage drop of a first impedance of a class AB amplifier output stage;
- generating an output signal of a second amplifier circuit based on a voltage drop of a second impedance of the class AB amplifier output stage;
- and
- generating a compensating current when the voltage drop of the first impedance is different from the voltage drop of the second impedance, the compensating current to adjust the voltage drop of the first impedance, the voltage drop of the second impedance, or a combination thereof, such that the voltage drop of the first impedance and the voltage drop of the second impedance are to be adjusted to be approximately equal.
1 more element
Dependencies are inferred from the claim text.