The embodiments described herein use resonant circuits to provide isolation between closely proximate conductors. For example, these resonant circuits can be used to reduce unwanted electromagnetic coupling and minimize crosstalk energy between package leads, bonding wires, and circuit board traces on radio frequency (RF) electronic devices, including RF power amplifiers. To facilitate a reduction in electromagnetic coupling, the resonant circuit is configured resonate with the closely proximate conductors at a selected frequency f.sub.0, and when resonating at the selected frequency f.sub.0 the resonant circuit provides a path to ground for the crosstalk energy. This path to ground reduces the crosstalk energy that would otherwise be shared between the two closely proximate conductors, and thus provides the electromagnetic isolation between the conductors.

The disclosure relates to a mobile device, comprising: a radio receiver configured to receive a radio signal; a power receiving unit (PRU) configured to receive a wireless charging signal from a power transmission unit (PTU) configured to charge the mobile device; a wireless broadcast receiver configured to receive a harmonic of the wireless charging signal during charging of the mobile device; a frequency manager configured to scan for a frequency of the harmonic and to detect a fundamental frequency of the wireless charging signal based on the scanned harmonic; and a mitigation module configured to mitigate a harmonic content of the wireless charging signal in the received radio signal based on the detected fundamental frequency of the wireless charging signal.

The disclosure relates to a mobile device, comprising: a radio receiver configured to receive a radio signal; a power receiving unit (PRU) configured to receive a wireless charging signal from a power transmission unit (PTU) configured to charge the mobile device; a wireless broadcast receiver configured to receive a harmonic of the wireless charging signal during charging of the mobile device; a frequency manager configured to scan for a frequency of the harmonic and to detect a fundamental frequency of the wireless charging signal based on the scanned harmonic; and a mitigation module configured to mitigate a harmonic content of the wireless charging signal in the received radio signal based on the detected fundamental frequency of the wireless charging signal.

Systems and methods are provided for generating reference signals with high interference immunity. A signal source may generate reference signals having a particular reference frequency based on characteristics of the source of the reference signals, for use in driving at least one component in a system. One or more processing may then process the generated reference signals, based on particular frequency positions relative to the particular reference frequency and other operations and/or components of the system. The processing may include filtering at the particular frequency positions. The particular frequency positions may correspond to the harmonics positions of the particular reference frequency. The signal source may be a crystal oscillator.

Systems and methods are provided for generating reference signals with high interference immunity. A signal source may generate reference signals having a particular reference frequency based on characteristics of the source of the reference signals, for use in driving at least one component in a system. One or more processing may then process the generated reference signals, based on particular frequency positions relative to the particular reference frequency and other operations and/or components of the system. The processing may include filtering at the particular frequency positions. The particular frequency positions may correspond to the harmonics positions of the particular reference frequency. The signal source may be a crystal oscillator.

A resonator oscillator that may be included in a gas sensing system may include an oscillator that may be electrically connected to an external resonator through a conductive line. The oscillator may generate an oscillating signal having a frequency corresponding to a resonance frequency of the external resonator in an oscillating path. A spurious resonance removal circuit on the oscillating path may remove spurious resonance caused by the conductive line from the oscillating path. A gas sensing system may include the oscillator, a resonator that includes a sensor configured to sense a gas, and a frequency counting logic that receives the oscillating signal and a reference clock signal, performs a counting operation on the oscillating signal according to a logic state of the reference clock signal to generate a counted value, and generate a gas sensing output indicating a sensed gas based on the counted value.

A resonator oscillator that may be included in a gas sensing system may include an oscillator that may be electrically connected to an external resonator through a conductive line. The oscillator may generate an oscillating signal having a frequency corresponding to a resonance frequency of the external resonator in an oscillating path. A spurious resonance removal circuit on the oscillating path may remove spurious resonance caused by the conductive line from the oscillating path. A gas sensing system may include the oscillator, a resonator that includes a sensor configured to sense a gas, and a frequency counting logic that receives the oscillating signal and a reference clock signal, performs a counting operation on the oscillating signal according to a logic state of the reference clock signal to generate a counted value, and generate a gas sensing output indicating a sensed gas based on the counted value.

To reduce interference between wiring patterns at an oscillator that outputs a plurality of oscillation signals. An oscillator includes an IC configured to output a plurality of oscillation signals using a crystal resonator, and a base plate connected to the IC. The base plate includes a crystal resonator land and a crystal resonator land that are electrically connected to the crystal resonator, a power source land electrically connected to a power source, and a first output land positioned between the crystal resonator land and the power source land to output a first oscillation signal from the IC to an outside, and a wiring pattern from the first output land passes through between the crystal resonator land and the crystal resonator land.

To reduce interference between wiring patterns at an oscillator that outputs a plurality of oscillation signals. An oscillator includes an IC configured to output a plurality of oscillation signals using a crystal resonator, and a base plate connected to the IC. The base plate includes a crystal resonator land and a crystal resonator land that are electrically connected to the crystal resonator, a power source land electrically connected to a power source, and a first output land positioned between the crystal resonator land and the power source land to output a first oscillation signal from the IC to an outside, and a wiring pattern from the first output land passes through between the crystal resonator land and the crystal resonator land.

A method for cancelling phase noise in a radar signal is described herein. In accordance with one embodiment, the method includes transmitting an RF oscillator signal, which represents a local oscillator signal including phase noise, to a radar channel and receiving a respective first RF radar signal from the radar channel. The first RF radar signal included at least one radar echo of the transmitted RF oscillator signal. Further, the method includes applying the RF oscillator signal to an artificial radar target composed of circuitry, which applies a delay and a gain to the RF oscillator signal, to generate a second RF radar signal. The second RF radar signal is modulated by a modulation signal thus generating a frequency-shifted RF radar signal. Further, the method includes subtracting the frequency-shifted RF radar signal from the first RF radar signal.