Distribution of shared local oscillation to multiple RF intefaces of a wireless device

K Carter, A Behzad - US Patent App. 11/703,421, 2007 - Google Patents
(57) ABSTRACT A Radio Frequency (RF) transceiver Integrated Circuit (IC) includes a
plurality-of RF transceivers, local oscillation generation circuitry that produces a local …

Method and system for mitigating the effects of a transmitted blocker and distortions therefrom in a radio receiver

AJ Kim, S Laurent-Michel, S Jantzi - US Patent 9,755,691, 2017 - Google Patents
(57) ABSTRACT A radio receiver processing path has a mixer with active
interference/blocker cancellation to reduce the intensity of leaked and undesired signals by …

Noise reduction in a dual radio frequency receiver

N Khlat, AW Hietala, F Della Corte - US Patent 8,200,181, 2012 - Google Patents
The present invention relates to a dual radio frequency (RF) receiver circuit that includes a
first RF mixer and a second RF mixer. The first and second RF mixers may be fed from a …

Radio frequency transceiver loopback testing

K Waheed, CN Stoll, JD Vogler - US Patent 9,584,175, 2017 - Google Patents
US 2016/O174094 A1 Jun. 16, 2016 (57) ABSTRACT (51) Int. Cl. H04/24/00(2009.01) An
integrated circuit includes a receiver portion, a transmit H04B I/40(2015.01) ter portion, and …

Calibrating RF path delay and IQ phase imbalance for polar transmit system

A Belitzer, B Sogl - US Patent 9,413,583, 2016 - Google Patents
BACKGROUND Polar Transmitter (Polar TX) architectures are very attrac-15 tive for modern
radios because such architectures can provide improved area and power consumption …

Transceiver circuitry with multiple phase-locked loops

DW Mendel, S Shumarayev, R Venkata - US Patent 8,692,595, 2014 - Google Patents
BACKGROUND Phase-locked loop circuits based on LC-based voltage controlled
oscillators (eg, voltage-controlled oscillators (VCOs) that include inductors and capacitors) …

Method and apparatus for local oscillator

X Gao, CH Lin, L Lin - US Patent App. 13/861,125, 2013 - Google Patents
Aspects of the disclosure provide a local oscillator (LO) circuit that includes a first phase
locked loop (PLL) circuit and a second PLL. The first PLL circuit is configured to generate a …

Phase synchronization for round trip delay estimation

A Dorosenco, C Hardin, JP Burke, JB Soriaga… - US Patent …, 2021 - Google Patents
Phase variations between a transmitter (TX) waveform and a receiver (RX) waveform
produced by a TX Phase-Locked Loop (PLL) and a RX PLL, respectively, is a source of error …

Systems and methods for a PLL-adjusted reference clock

J Coppin - US Patent 7,929,919, 2011 - Google Patents
A system is provided, the system includes a phase-locked loop (PLL) that multiplies a
reference clock input to generate a communication link clock signal. The system also …

Calibrating RF path delay and IQ phase imbalance for polar transmit system

A Belitzer, B Sogl - US Patent 9,954,626, 2018 - Google Patents
A method of calibrating parameters for a polar transmitter (Polar TX) system includes
receiving phase information derived from transmission information in a Polar TX for …