1
Jose Cabanillas: Cascaded amplifiers with transformer-based bypass mode. QUALCOMM Incorporated, Ramin Mobarhan, April 3, 2012: US08149050 (51 worldwide citation)

Cascaded amplifiers with a transformer-based bypass mode are described. In an exemplary design, an apparatus includes first and second amplifiers and a circuit. The first amplifier (e.g., a driver amplifier) provides amplification in a high gain mode and a bypass mode. The second amplifier (e.g., a ...


2
Jose Cabanillas: Coupled-inductor multi-band VCO. Qualcomm Incorporated, Philip R Wadsworth, Charles D Brown, Alex C Chen, December 26, 2006: US07154349 (29 worldwide citation)

A multi-band VCO employs a coupled-inductor based resonator having N≧2 ports. Each port has an inductor and at least one capacitor. The N inductors for the N ports are magnetically coupled. The inductors/ports may be selectively enabled and disabled to allow the VCO to operate at different frequency ...


3
Jose Cabanillas, Prasad S Gudem, Namsoo Kim, Cristian Marcu, Anup Savla: Low noise and low input capacitance differential MDS LNA. QUALCOMM Incorporated, Larry J Moskowitz, William M Hooks, May 17, 2011: US07944298 (23 worldwide citation)

A differential low noise amplifier (LNA) involves two main amplifying transistors biased in saturation, and two cancel transistors biased in sub-threshold. In one example, the gates of the cancel transistors are coupled to the drains of main transistors, in a symmetrical and cross-coupled fashion. T ...


4
Li Chung Chang, Prasad S Gudem, Jose Cabanillas: Wireless receiver with notch filter to reduce effects of transmit signal leakage. QUALCOMM Incorporated, Kenyon S Jenckes, Ramin Mobarhan, October 11, 2011: US08036623 (9 worldwide citation)

This disclosure describes techniques for reducing adverse effects of TX signal leakage in a full-duplex, wireless communication device. The techniques make use of a notch filter to reject TX signal leakage in a signal processed in the RX path of the wireless communication device. The notch filter ma ...


5
Prasad S Gudem, Jose Cabanillas, Li Chung Chang, Li Liu: Reconfigurable high linearity low noise figure receiver requiring no interstage saw filter. Qualcomm Incorporated, S Hossain Beladi, April 30, 2013: US08433272 (6 worldwide citation)

A receiver includes a jammer detector configured to detect the presence or the absence of jamming in a communication signal within a gain state. The receiver further includes an amplifier configured to amplify the communication signal in a high linearity receiving mode or a low linearity receiving m ...


6
Maulin Pareshbhai Bhagat, John Woolfrey, Jose Cabanillas: Dual inductor circuit for multi-band wireless communication device. QUALCOMM Incorporated, Eric Ho, December 11, 2012: US08331978 (4 worldwide citation)

A wireless communication device includes a component operating in a single frequency mode. The component includes a first differential branch that includes first input nodes and first output nodes. The first output nodes are coupled to ground. A second differential branch includes second input nodes ...


7
Jose Cabanillas, Prasad S Gudem, Sai Chong Kwok, David Love: Common mode signal attenuation for a differential duplexer. QUALCOMM Incorporated, Jiayu Xu, December 7, 2010: US07848713 (4 worldwide citation)

Techniques for attenuating undesired signal components from a differential duplexer are described. The duplexer provides a differential received signal at RX+ and RX− ports. This differential received signal includes an undesired common mode signal, which may come from a transmit signal. The common ...


8
Maulin Pareshbhai Bhagat, John Woolfrey, Jose Cabanillas: Dual inductor circuit for multi-band wireless communication device. Qualcomm Incorporated, Eric Ho, July 10, 2012: US08219060 (3 worldwide citation)

This disclosure describes a dual inductor circuit, which may be particularly useful in a mixer of a wireless communication device to allow the mixer to operate for two different frequency bands or in a multi-differential branch low noise amplifier wherein each of the differential branches possess a ...


9
Jose Cabanillas, Aristotele Hadjichristos, Per O Kristensen, Mohan V Puntambekar: Filters for multi-band wireless device. QUALCOMM Incorporated, Liberty E Mann, June 27, 2017: US09692392 (2 worldwide citation)

Techniques to implement a filter for a selected signal path by reusing a circuit component in an unselected signal path are disclosed. In an exemplary design, an apparatus includes first, second, and third circuits. The first circuit passes a first radio frequency (RF) signal to an antenna when a fi ...


10
Jose Cabanillas: Systems and methods providing loadline modulation of a power amplifier. QUALCOMM Incorporated, Haynes and Boone, November 6, 2018: US10122326

A circuit including: a power amplifier configured to provide amplified signals to a load; an impedance matching network disposed between the power amplifier and the load, the impedance matching network comprising an adjustable impedance unit; and a feedback loop comprising a rectifier, the rectifier ...