Radio-frequency transmitter and amplifier
AssigneeIntel IP Corporation
InventorOmid Oliaei
Life of this patent
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Abstract
A method is provided for reducing non-linear effects in an electronic circuit including an amplifier. The method may include receiving a modulated signal at an input of the amplifier, the modulated signal comprising a baseband signal modulated by an oscillator frequency. The method may further include substantially attenuating counter-intermodulation in the modulated signal caused by harmonics of the oscillator frequency and the baseband signal by a resonant circuit. In some embodiments, the resonant circuit may include at least one inductive element and one capacitive element coupled to the at least one inductive element, the at least one inductive element and the at least one capacitive element configured to substantially attenuate counter-intermodulation in the modulated signal.
Claims9
A radio transmitter apparatus, comprising:
- circuitry configured to receive a modulated signal and amplify the modulated signal;
- a local oscillator to provide an oscillator frequency;
- and
- an LC circuit configured to substantially suppress harmonics of the oscillator frequency associated with the modulated signal,
- wherein at least one inductor or at least one capacitor is coupled between a terminal of a transistor of the circuit and a supply voltage.
A radio transmitter apparatus, comprising:
- circuitry configured to receive a modulated signal and amplify the modulated signal;
- a local oscillator to provide an oscillator frequency;
- and
- an LC circuit configured to substantially suppress harmonics of the oscillator frequency associated with the modulated signal,
- wherein the circuitry is configured to receive the modulated signal generated based on data modulation of a frequency reference and provided to the local oscillator,
- wherein the circuitry comprises an amplifier configured to combine outputs from the local oscillator, the modulated signal generated based on data modulation of a frequency reference injected to the local oscillator, and
- wherein the LC circuit is configured to couple to an output of the amplifier and to an antenna for transmission of the amplified modulated signal after the harmonics are substantially suppressed.
Dependencies are inferred from the claim text.