Radio frequency modulator and methods thereof
First Claim
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1. A method comprising:
- setting an attenuation level once per a command to set an average output power of output signals of a power amplifier; and
attenuating according to said attenuation level outphased modulated signals prior to amplification of said signals by said power amplifier.
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Abstract
In one exemplary embodiment of the invention, an outphasing modulator may include at least a multiplier to multiply an amplitude modulation signal by a phase modulated carrier signal to generate a modulated signal. The outphasing modulator may also include a phase splitter to phase split the modulated signal to generate phase shifted modulated signals. The outphasing modulator may also include a sum-difference combiner to produce outphased modulated signals from the phase shifted modulated signals.
134 Citations
26 Claims
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1. A method comprising:
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setting an attenuation level once per a command to set an average output power of output signals of a power amplifier; and
attenuating according to said attenuation level outphased modulated signals prior to amplification of said signals by said power amplifier. - View Dependent Claims (2, 3)
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4. A method comprising:
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multiplying a first phase shifted signal by a first amplitude modulation signal with a first scaling factor to produce a first phase shifted modulated signal;
multiplying a second phase shifted signal with a second amplitude modulation signal to produce a second phase shifted modulated signal; and
generating outphased modulated signals from said first phase shifted modulated signal and said second phase shifted modulated signal. - View Dependent Claims (5, 6, 7)
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8. A method comprising:
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multiplying a phase modulated carrier signal by an amplitude modulation signal with a scaling factor to produce an amplitude modulated signal; and
phase splitting said amplitude modulated signal to generate phase shifted modulated signals. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A transmitter comprising:
an outphasing modulator, said outphasing modulator including at least;
a multiplier to multiply an amplitude modulation signal by a phase modulated carrier signal to generate a modulated signal;
a phase splitter coupled to said multiplier, said phase splitter to phase split said modulated signal to generate phase shifted modulated signals; and
a sum-difference combiner coupled to said phase splitter, said sum-different combiner to produce from said phase shifted modulated signals outphased modulated signals. - View Dependent Claims (18, 19, 20)
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21. A communication device comprising:
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a dipole antenna; and
a transmitter including at least an outphasing modulator, said outphasing modulator including at least;
a multiplier to multiply an amplitude modulation signal by a phase modulated carrier signal to generate a modulated signal;
a phase splitter coupled to said multiplier, said phase splitter to phase split said modulated signal to generate phase shifted modulated signals; and
a sum-difference combiner coupled to said phase splitter, said sum-different combiner to produce from said phase shifted modulated signals outphased modulated signals; and
a power amplifier coupled to said dipole antenna and to said sum-difference combiner, said power amplifier to amplify said outphased modulated signals. - View Dependent Claims (22, 23)
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24. A communication system comprising:
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a first communication device; and
a second communication device, said second communication device including at least;
a transmitter including at least an outphasing modulator, said outphasing modulator including at least;
a multiplier to multiply an amplitude modulation signal by a phase modulated carrier signal to generate a modulated signal;
a phase splitter coupled to said multiplier, said phase splitter to phase split said modulated signal to generate phase shifted modulated signals; and
a sum-difference combiner coupled to said phase splitter, said sum-different combiner to produce from said phase shifted modulated signals outphased modulated signals. - View Dependent Claims (25, 26)
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Specification