APPLICATIONS
- Cell Phones
- GPS Devices
- Hand Held Games
- Pocket PCs
- PDAs
- Standalone MTV devices
- USB plug-in MTV modules
FEATURES & BENEFITS
- Actively cancels unwanted RF noise in the 300MHz-3000MHz frequency range
- Improves receiver sensitivity
- Enables simultaneous operation of multiple co-located radios
- Improves overall quality of service
- Up to 30dB Cancellation Dynamic Range
- Internal LNA in the sampler path to improve sensitivity of the sampler path
- SPI bus interface eliminates the need for external DACs to control the canceller
DESCRIPTION
Electromagnetic Interference (EMI) is emerging as a major concern in next generation wireless communication systems. As handsets now support multiple services and features that utilize high data rates simultaneously, removing interference within the handset has become a challenge.
Reducing the Electromagnetic Interference recovers the receiver sensitivity, enables simultaneous operation of multiple radios, and improves the overall quality of service of communication devices. Quellan’s QHx230 is situated in a wireless device to sample the source of the noise and emulate the RF coupling channel between the noise source and victim receiver antenna. In doing so, an anti-noise signal can be applied directly to the victim receive path to cancel the EMI and achieve the signal integrity benefits. This approach makes it possible to cancel both in band (within the victim Rx band) or out of band aggressors. This is a revolutionary approach since it is only possible to cancel out of band noise using conventional Rx filters.
The QHx230 is designed in a standard 0.18μm CMOS process requiring a single 1.8V power supply with typical power consumption of less than 20mW. The QHx230 comes in a standard package of QFN16-3x3mm2 or may be ordered as bumped die in a 1x1mm2 package.
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