Methods, systems, and apparatus for detecting a center frequency of an input signal, the
input signal including a carrier signal modulated with a modulation signal. Detecting a …

Apparatus and methods for calibrating radio frequency transmitters to compensate for
common mode local oscillator leakage are provided herein. In certain configurations herein …

A wireless communication calibration system has a radio chipset, an analog circuit set, and
a calibration path. The radio chipset has a transmitter and a receiver. The analog circuit set …

Illustrative embodiments of reconfigurable microwave filters, as well as associated systems
and methods, are disclosed. In at least one illustrative embodiment, a reconfigurable …

US11251750B1 - Crystal oscillator and startup method for a crystal oscillator - Google
Patents US11251750B1 - Crystal oscillator and startup method for a crystal oscillator …

A passive electro-mechanical device that reduces phase noise in oscillators, thereby
improving their frequency precision. The noise reduction device can consist of a pair of …

A method for reciprocal-mixing noise cancellation may include receiving a baseband signal
down-converted to baseband using a local oscillator (LO). The baseband signal may …