Back to results
US 7,679,450 B2Granted
Amplifier auto biasing
AssigneeInfineon Technologies AG
InventorBan Hok Goh
Life of this patent
Estimating the term…
Abstract
This disclosure relates to monitoring signal overshoot of an amplifier generated signal and automatically adjusting a quiescent current of the amplifier as a function of the monitored signal overshoot.
Claims23
A system comprising:
- a signal amplifier to generate an amplified signal, said signal amplifier having a quiescent current;
- a comparator disposed in an integrated circuit and including a circuit pin, said comparator to continuously receive the amplified signal via the circuit pin and to provide an indication when a level of an overshoot of the amplified signal, resulting from an inductance of the integrated circuit pin, exceeds a threshold level;
- and
- a control circuit to automatically adjust the quiescent current of the signal amplifier as a function of the level of the overshoot of the amplified signal that exceeds a threshold level.
1 more element
In a signal amplifier disposed in an integrated circuit including a circuit pin and a quiescent current, a device comprising:
- a comparator to receive an amplified signal generated by the signal amplifier, the comparator to provide an indication of a magnitude of a level of an overshoot of the amplified signal resulting from inductance of the integrated circuit pin;
- and
- a control circuit to adjust a class of the signal amplifier as a function of the indicated magnitude.
A method comprising:
- continuously monitoring signal overshoot of an amplifier generated signal resulting from inductance of an integrated circuit pin of a signal amplifier;
- and
- automatically reducing the signal overshoot by adjusting a quiescent current of the signal amplifier as a function of the monitored signal overshoot.
A system comprising:
- a signal amplifier to generate an amplified signal, said signal amplifier having a quiescent current;
- a comparator disposed in an integrated circuit and including a circuit pin, said comparator to continuously receive the amplified signal via the circuit pin and to provide an indication when a level of an overshoot of the amplified signal, resulting from an inductance of the integrated circuit pin, exceeds a threshold level;
- a control circuit to automatically adjust the quiescent current of the signal amplifier as a function of the level of the overshoot of the amplified signal that exceeds a threshold level;
- and
- wherein the signal amplifier is an AB amplifier and the control circuit provides a signal to the signal amplifier to configure the signal amplifier to operate as an A class amplifier when the level of the overshoot exceeds the threshold level and to configure the signal amplifier to operate as a B class amplifier when the level of the overshoot is less than the threshold level.
2 more elements
In a signal amplifier disposed in an integrated circuit including a circuit pin and a quiescent current, a device comprising:
- a comparator to receive an amplified signal generated by the signal amplifier, the comparator to provide an indication of a magnitude of a level of an overshoot of the amplified signal resulting from inductance of the integrated circuit pin;
- a control circuit to adjust a class of the signal amplifier as a function of the indicated magnitude;
- and
- wherein the signal amplifier is an AB amplifier having an A class and a B class, and wherein the control circuit provides a signal to the signal amplifier to:
- select an A class when the value of the level of the overshoot exceeds the threshold level, and
- select a B class when the value of the level of the overshoot is below the threshold level.
3 more elements
A method comprising:
- continuously monitoring signal overshoot of an amplifier generated signal resulting from inductance of an integrated circuit pin of a signal amplifier;
- automatically reducing the signal overshoot by adjusting a quiescent current of the signal amplifier as a function of the monitored signal overshoot;
- and
- wherein the signal amplifier is a class AB amplifier, operating the signal amplifier at class A when a level of the overshoot exceeding a predetermined threshold level is detected and operating the signal amplifier at class B when a level of overshoot below the predetermined threshold level is detected.
1 more element
Dependencies are inferred from the claim text.