Multi-mode amplifier arrangement and method for controlling an amplifier arrangement
AssigneeInfineon Technologies AG
InventorWerner Schelmbauer
Life of this patent
Estimating the term…
Abstract
A multi-mode amplifier arrangement comprises an amplifier having a plurality of field effect transistors selectable in response to a control signal at a control terminal, said plurality of field effect transistors coupled to an input terminal to receive a signal to be amplified, said amplifier arranged between a supply terminal and a ground terminal. A tunable current source is coupled to the amplifier to provide in operation of the amplifier a constant drain current through the plurality of field effect transistors.
Claims28
A multi-mode amplifier arrangement, comprising:
- an amplifier comprising a plurality of field effect transistors selectable in response to a control signal at a control terminal, the plurality of field effect transistors coupled to an input terminal to receive a signal to be amplified,
- wherein the amplifier is arranged between a supply terminal and a ground terminal;
- and
- a tuneable current source coupled to the amplifier and configured to provide a substantially constant drain current through the selected plurality of field effect transistors.
A multi-mode amplifier arrangement, comprising:
- a differential amplifier coupled between a first supply terminal and a second supply terminal, the differential amplifier comprising a plurality of field effect transistors that are selectable in response to a first control signal;
- a current source configured to provide a selectable output current in response to a second control signal, wherein the current source is coupled to the differential amplifier and configured to provide a constant current through the selected plurality of field effect transistors.
A multi-mode amplifier arrangement, comprising:
- a differential amplifier having a signal transfer function, wherein the differential amplifier is configured to operate in an interval of the signal transfer function, the differential amplifier comprising a tuning input terminal configured to receive a signal to change the position of the interval of the signal transfer function;
- a tunable current source coupled to the differential amplifier, and configured to provide a current through the differential amplifier that is substantially independent of the position of the interval, wherein the current changes the size of the interval of the signal transfer function.
A method for controlling an amplifier arrangement to operate in at least two different operation modes, comprising:
- providing a differential amplifier having a signal transfer function, and comprising a plurality of selectable field effect transistors;
- providing a tunable current source operably associated with the differential amplifier;
- providing a supply current to supply the differential amplifier;
- selecting an interval of the signal transfer function by selecting at least one of the field effect transistors of the plurality of field effect transistors;
- and
- selecting a size of the interval of the signal transfer function by tuning the current source,
- wherein selecting the interval is independent from selecting the size of the signal transfer function.
Dependencies are inferred from the claim text.