Qualcomm Incorporated

Bassel Hanafi

Hasnain Lakdawala

Ojas Choksi

Francesco Gatta

Bin Fan

Sherif Abdelhalem

Prashanth Akula

Faramarz Sabouri

Mehmet Uzunkol

Xingyi Hua

Ahmed Kord

Karthik Tripurari Jayaraman

A wideband amplifier includes an input matching network for matching a transconductor stage to an input impedance and includes an output matching network for matching the transconductor stage to an output impedance. Both the input and output matching networks each includes a parallel LC tank circuit arranged in parallel with a series LC tank circuit. The tank circuit arrangements configure the input and output matching networks to be resonant at a first frequency, a midrange frequency that is greater than the first frequency, and a second frequency that is greater than the midrange frequency to provide wideband matching.

Wideband amplifier

Aspects of the disclosure relate to devices, wireless communication apparatuses, methods, and circuitry implementing a low noise amplifier (LNA) with phase-shifting circuitry to achieve a continuous phase at the output of the LNA. One aspect is an amplifier including a high gain active path comprising active circuitry, and a low gain path comprising passive circuitry and phase-shifting circuitry. In one or more aspects, the phase-shifting circuitry is configured to shift a phase of an input signal within the low gain path such that the phase of an output signal outputted from the low gain path approximately matches a phase of an output signal outputted from the high gain active path. In at least one aspect, a gain of the high gain active path is higher than a gain of the low gain passive path.

Constant-phase attenuator techniques in radio frequency front end (RFFE) amplifiers

Certain aspects of the present disclosure generally relate to a multi-output amplifier implemented using a capacitive attenuator. For example, the multi-output amplifier generally includes a first capacitive attenuator coupled to an input node of the multi-output amplifier. In certain aspects, the multi-output amplifier also includes a first amplification stage having an input coupled to a tap node of the first capacitive attenuator and an output coupled to a first output node of the multi-output amplifier, and a second amplification stage having an output coupled to a second output node of the multi-output amplifier. For certain aspects, the multi-output amplifier includes a second capacitive attenuator coupled to the input node of the multi-output amplifier, and the second amplification stage may have an input coupled to a tap node of the second capacitive attenuator.

Low-noise amplifier (LNA) with capacitive attenuator

A device and method for amplifying signals is provided. The device can have an input to receive an input signal having a first desired signal on a first carrier, a second desired signal on a second carrier, and one or more interfering signals. The device can have a first carrier aggregation (CA) chain for use with the first desired signal and a second CA chain for use with the second desired signal. The first and second CA chains can be coupled to the input. The first and second CA chains can have a plurality of transconductance stages. Each of the transconductance stages can be configured as a high impedance stage or a low impedance stage. The transconductance stages can be selectively activated to incrementally adjust the transconductance, and therefore the input impedance, of each of the CA chains.

Wideband high linearity LNA with intra-band carrier aggregation support

An apparatus includes: first and second transistors, each of the first and second transistors includes a gate terminal, a source terminal, and a drain terminal; and a transformer including a primary winding and first and second secondary windings, the primary winding is coupled to a first input node configured to receive an input signal and a second input node configured to receive a potential, the first and second secondary windings are coupled to gate terminals of the first and second transistors and cross-coupled to source terminals of the first and second transistors.

Transformer feedback amplifier

An apparatus including: at least one differential amplifier configured to amplify a radio frequency signal; a mixer configured to mix the radio frequency signal from the at least one differential amplifier with a local oscillator signal; and a low-pass filter coupled to the mixer, the low-pass filter includes a capacitor and at least one variable resistor configured to tune the low-pass filter.

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San Diego, CA, United States of America

Bassel Hanafi