Qualcomm Incorporated

Muhammad Hassan

Bhushan Shanti Asuri

Chuan Wang

Ravi Sridhara

Abdellatif Bellaouar

Jeremy Darren Dunworth

Yiwu Tang

Chinmaya Mishra

Dongling Pan

Jorge Garcia

Klaas Van Zalinge

Gurkanwal Singh Sahota

Li Liu

Vinod Panikkath

Arul Balasubramaniyan

Omar Essam El-Aassar

Jeremy Mark Goldblatt

Yunfei Feng

Anosh Bomi Davierwalla

Wu-Hsin Chen

Mohamed Abouzied

Youngchang Yoon

Apsara Ravish Suvarna

Maziar Hedayati

Anosh Davierwalla

Te Yu Kao

An apparatus is disclosed for oscillator feedthrough calibration, such as a component arrangement that can be calibrated to account for signal leakage from an oscillator coupled to a mixer circuit. In example aspects, the apparatus includes a mixer circuit having a first stage, a second stage, and tuning circuitry. The first stage includes at least one transistor coupled between a mixer input and a mixer output. The second stage includes one or more transistors coupled between the at least one transistor of the first stage and the mixer output. The one or more transistors are also coupled between a local oscillator signal input and the mixer output. The tuning circuitry includes at least one current source coupled to the at least one transistor of the first stage.

Oscillator feedthrough calibration

In certain aspects, a method is provided for measuring power using a resistive element coupled between a power amplifier and an antenna. The method includes squaring a voltage from a first terminal of the resistive element to obtain a first signal, squaring a voltage from a second terminal of the resistive element to obtain a second signal, and generating a measurement signal based on a difference between the first signal and the second signal. In some implementations, the resistive element is implemented with a power switch.

Power detector

In certain aspects, an apparatus includes a first amplifier having a first output and a second output, and a transformer. The transformer includes a first switchable inductor coupled between the first output and the second output, a first capacitor coupled in parallel with the first switchable inductor, a second switchable inductor magnetically coupled to the first switchable inductor, a second capacitor coupled in parallel with the second switchable inductor, a third switchable inductor magnetically coupled to the first switchable inductor, and a third capacitor coupled in parallel with the third switchable inductor.

Amplifier with switchable transformer

A phased array element includes a transmit portion having a plurality of amplifier paths, each amplifier path having a driver amplifier and a power amplifier, a first transformer coupled to the power amplifier of a first amplifier path of the plurality of amplifier paths and a second transformer coupled to the power amplifier of a second amplifier path of the plurality of amplifier paths, a secondary winding of each of the first transformer and the second transformer coupled together by a common transformer segment, a transmit phase shifter switchably coupled to the plurality of amplifier paths, a receive portion coupled to the second transformer, the receive portion having a receive path having a low noise amplifier (LNA), and a receive phase shifter coupled to the LNA.

Multi mode phased array element

In certain aspects, a chip includes a pad, and a power amplifier having a first output and a second output. The chip also includes a transformer, wherein the transformer includes a first inductor coupled between a first terminal and a second terminal of the transformer, wherein the first terminal is coupled to the first output of the power amplifier, and the second terminal is coupled to the second output of the power amplifier. The transformer also includes a second inductor coupled between a third terminal and a fourth terminal of the transformer, wherein the third terminal is coupled to the pad. The chip also includes a first switch coupled to the fourth terminal, a shunt inductor coupled in parallel with the first switch, and a low-noise amplifier coupled to the third terminal.

Switch with electrostatic discharge (ESD) protection

Aspects described herein include devices and methods with chain routing of signals for massive antenna arrays. In some aspects, an apparatus is provided that includes a first millimeter wave (mmW) transceiver having a first port, a second port, one or more antenna elements, a plurality of chain mmW transceiver ports, and switching circuitry. The switching circuitry is controllable by control data to route portions of a merged clock and data signal and a merged control and data signal between a first route between the one or more antenna elements and the first port and a second route between the one or more antenna elements and the second port and a third route between the first port and the plurality of chain mmW transceiver ports and a fourth route between the second port and the plurality of chain mmW transceiver ports.

Split chaining for large phase array systems

Aspects of the present relate to reflection type phase shifters for radio frequency (RF) wireless devices. Reflection type phase structures in accordance with aspects described herein can improve device performance with compact configurations, such as where magnetic and capacitive coupling is integrated into a device design to integrate interactions between elements for improved phase shifting performance in a compact design with wideband performance.

Compact low-loss reflection type phase shifter

Power detector including squaring circuits

A transceiver is configured for a calibration mode of operation in which an impedance of a transmit chain is tuned responsive to a power measurement of a mixed RF calibration signal to form a tuned transmit chain. A direct conversion mixes an RF calibration signal with a DC offset signal to form the mixed calibration signal. During a normal mode of operation, a heterodyne mixer mixes an LO signal with an IF signal to produce an RF signal that is amplified through the tuned transmit chain.

Transceiver droop calibration

According to certain aspects, a chip includes a pad, a power amplifier, a transformer coupled between an output of the power amplifier and the pad, a transistor coupled between the transformer and a ground, and a first clamp circuit coupled between a gate of the transistor and a drain of the transistor.

In some aspects, an apparatus includes a transformer including a first inductor, a second inductor, and a third inductor. The apparatus also includes a power amplifier coupled to the first inductor, a first antenna coupled to a first terminal of the second inductor, a second antenna coupled to a second terminal of the second inductor, a first switch coupled between the first terminal of the second inductor and a ground, a second switch coupled between the second terminal of the second inductor and the ground, and a low-noise amplifier coupled to the third inductor.

Antenna switching scheme

A differential amplifier having a tunable filter is disclosed. The tunable filter may attenuate some common-mode signals while not affecting amplification of differential signals. The tunable filter may include a resonant circuit to select frequencies of common-mode signals to attenuate. The resonant circuit may include a variable capacitor series-coupled to an inductor. A resonant frequency of the resonant circuit may be determined, in part, by a capacitance value of the variable capacitor.

Amplifier with common-mode filter

A device includes a main two-stage low noise amplifier (LNA) configured to amplify a carrier aggregation (CA) communication signal, the main two-stage LNA comprising a first LNA stage and a second LNA stage, an output of the first LNA stage having a first stage second order intermodulation product, the second LNA stage comprising a phase-inverter configured to phase-invert the output of the first LNA stage to generate a second stage phase-inverted output, and an auxiliary LNA stage coupled to the main two-stage LNA, the auxiliary LNA stage configured to cancel the first stage second order intermodulation product.

Distortion cancellation for dual stage carrier-aggregation (CA) low noise amplifier (LNA) non-linear second order products

A device includes a load circuit configured to receive an amplified communication signal, the load circuit having a center tapped inductor structure configured to divide the amplified communication signal into a first portion and a second portion, the load circuit configured to resonate at a harmonic of the amplified communication signal.

Dual stage carrier-aggregation (CA) low noise amplifier (LNA) having harmonic rejection and high linearity

A device includes a multi-mode low noise amplifier (LNA) having a first amplifier stage, and a second amplifier stage coupled to the first amplifier stage, the second amplifier stage having a plurality of amplification paths configured to amplify a plurality of carrier frequencies, the first amplifier stage configured to bypass the second amplifier stage when the first amplifier stage is configured to amplify a single carrier frequency.

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San Diego, CA, United States of America

Muhammad Hassan