Reducing local oscillation leakage in a radio frequency transmitter
AssigneeViXS Systems, Inc.
InventorsBojan Subasic, Mathew A. Rybicki
Life of this patent
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Abstract
A method for reducing LO leakage in a radio frequency transmitter begins by producing analog outbound signals from digital outbound signals that represent transmit data. The processing continues by amplifying the analog outbound signals to produce amplified analog outbound signals. The process then continues by mixing the amplified analog outbound signals with a local oscillation to produce mixed signals having an LO leakage component. The processing then continues by attenuating the mixed signals having the LO leakage component to produce mixed signals having reduced LO leakage.
Claims13
A method for reducing local oscillation (LO) leakage in a radio frequency (RF) transmitter, the method comprises:
- producing analog outbound signals from digital outbound signals that represent transmit data;
- amplifying the analog outbound signals by an amplifier gain to produce amplifier analog outbound signals;
- mixing the amplified analog outbound signals with a local oscillation to produce mixed signals having an LO leakage component;
- and
- attenuating the mixed signals having the LO leakage component by an amount that is based on the amplifier gain, to produce mixed signals having reduced LO leakage.
An apparatus for reducing local oscillation (LO) leakage in a radio frequency (RF) transmitter, the apparatus comprises:
- processing module;
- and
- memory operably coupled to the processing module, wherein the memory stores operational instructions that cause the processing module to:
- produce analog outbound signals from digital outbound signals that represent transmit data;
- amplify the analog outbound signals by an amplifier gain to produce amplifier analog outbound signals;
- mix the amplified analog outbound signals with a local oscillation to produce mixed signals having an LO leakage component;
- and
- attenuate the mixed signals having the LO leakage component by an amount that is based on the amplifier gain, to produce mixed signals having reduced LO leakage.
A radio frequency (RF) transmitter having reduce local oscillation (LO) leakage, wherein the RF transmitter comprises:
- a digital to analog converter operably coupled to convert baseband digital signals into baseband analog signals;
- a gain module operably coupled to amplify the baseband analog signals by an amplifier gain to produce amplified baseband signals;
- mixing stage operably coupled to mix the amplified baseband signals with a local oscillation to produce mixed signals, wherein the mixed signals include an LO leakage component;
- and
- an attenuation module operably coupled to attenuate the mixed signals by an attentuation that is based on the amplifier gain, to produce outbound mixed signals, wherein the outbound mixed signals have an attenuated LO leakage component.
Dependencies are inferred from the claim text.