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US 2018/0026584 A1Published application
Noise cancelling baseband amplifier
AssigneeQUALCOMM Incorporated
InventorsJoung Won Park, Namsoo Kim
Life of this patent
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Abstract
An apparatus includes a first amplifier having a first feedback resistance and an output configured to be coupled to a first input of a second amplifier having a second feedback resistance. The apparatus includes a third amplifier coupled to an input of the first amplifier and having an output configured to be coupled to a second input of the second amplifier.
Claims20
An apparatus comprising:
- a low noise amplifier;
- a mixer coupled to the low noise amplifier;
- a first differential amplifier having a first input configured to receive an input signal from the mixer and having an output configured to be coupled to an inverting input of a second differential amplifier;
- and
- a single-ended amplifier having an input coupled to the first input of the first differential amplifier and having an output configured to be coupled to a non-inverting input of the second differential amplifier, the single-ended amplifier configured to receive the input signal.
2 more elements
An apparatus comprising:
- means for amplifying low noise signals;
- means for mixing signals, the means for mixing coupled to the means for amplifying;
- and
- means for filtering received signals, the means for filtering coupled to the means for mixing, and the means for filtering comprising:
- first means for amplifying including a first input configured to receive an input signal and including an output configured to be coupled to an inverting input of second means for amplifying;
- and
- third means for amplifying including an input coupled to the first input of the first means for amplifying and including an output coupled to a non-inverting input of the second means for amplifying, the third means for amplifying configured to receive the input signal.
4 more elements
A method of processing signals, the method comprising:
- performing, at a low noise amplifier, a low noise amplification operation on a signal to generate an input signal;
- amplifying the input signal at a first differential amplifier to produce a first amplified signal that is provided to an inverting input of a second differential amplifier;
- amplifying the input signal at a single-ended amplifier to produce a flicker noise canceling signal that is provided to a non-inverting input of the second differential amplifier, wherein the single-ended amplifier receives the input signal at an input coupled to a first input of the first differential amplifier;
- and
- amplifying the first amplified signal and the flicker noise canceling signal at the second differential amplifier to produce an output signal.
2 more elements
Dependencies are inferred from the claim text.