US 7,734,258 B2Granted

RF transmitter front-end and applications thereof

AssigneeBroadcom Corporation

InventorsMohammad Nariman, Alireza Zolfaghari, Hooman Darabi

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Abstract

A radio frequency (RF) transmitter front-end includes a digital to analog conversion module and a power amplifier module. The digital to analog conversion module is coupled to convert amplitude information into analog amplitude adjust signals when a first mode is active and is coupled to convert power level information into analog power level signals when a second mode is active. The power amplifier module is coupled to amplify first phase modulated RF signals in accordance with the analog amplitude adjust signals to produce first outbound RF signals when the first mode is active and is coupled to amplify second phase modulated RF signals in accordance with the analog power level signals to produce second outbound RF signals when the second mode is active.

Claims17

Dependent claims

A multi-mode radio frequency (RF) transmitter comprises:

a first baseband processing module, when active, is coupled to convert first outbound data into first symbols that include first phase information and amplitude information;
a second baseband processing module, when active, is coupled to convert second outbound data into second symbols that include second phase information and, when active, is coupled to generate power level information;
up-conversion module coupled to convert the first phase information of the first symbols into first phase modulated RF signals when the first baseband processing module is active and coupled to convert the second phase information of the second symbols into second phase modulated RF signals when the second baseband processing module is active;
a digital to analog conversion module coupled to convert the amplitude information of the first symbols into analog amplitude adjust signals when the first baseband processing module is active and coupled to convert the power level information into analog power level signals when the second baseband processing module is active;
and
a power amplifier module coupled to amplify the first phase modulated RF signals in accordance with the analog amplitude adjust signals to produce first outbound RF signals when the first baseband processing module is active and coupled to amplify the second phase modulated RF signals in accordance with the analog power level signals to produce second outbound RF signals when the second baseband processing module is active.

3 more elements

A multi-mode radio frequency (RF) transmitter comprises:

a baseband processing module, when in a first mode, is coupled to convert outbound data signals into data symbols that include first phase information and amplitude information and, when in a second mode, is coupled to convert outbound voice signals into voice symbols that include second phase information and power level information, and wherein the baseband processing module generates power level information when in the second mode;
up-conversion module coupled to convert the first phase information of the data symbols into first phase modulated RF signals when the baseband processing module is in the first mode and coupled to convert the second phase information of the voice symbols into second phase modulated RF signals when the baseband processing module is in the second mode;
a digital to analog conversion module coupled to convert the amplitude information of the data symbols into analog amplitude adjust signals when the baseband processing module is in the first mode and coupled to convert the power level information into analog power level signals when the baseband processing module is in the second mode;
and
a power amplifier module coupled to amplify the first phase modulated RF signals in accordance with the analog amplitude adjust signals to produce outbound RF data signals when the baseband processing module is in the first mode and coupled to amplify the second phase modulated RF signals in accordance with the analog power level signals to produce outbound RF voice signals when the baseband processing module is in the second mode.

2 more elements

A radio frequency (RF) transmitter front-end comprises:

a digital to analog conversion module coupled to convert amplitude information into analog amplitude adjust signals when a first mode is active and coupled to convert power level information into analog power level signals when a second mode is active;
and
a power amplifier module coupled to amplify first phase modulated RF signals in accordance with the analog amplitude adjust signals to produce first outbound RF signals when the first mode is active and coupled to amplify second phase modulated RF signals in accordance with the analog power level signals to produce second outbound RF signals when the second mode is active.

Dependencies are inferred from the claim text.