Sony Semiconductor

GPS/GNSS Receiver

CXD5605
索尼半導體解決方案GPS / GNSS接收器/處理器芯片使用專有設計的高頻模擬電路和數字信號處理電路,以業界最低的功耗水平提供精確的定位。 這種低功耗性能有助於延長使用GPS / GNSS的物聯網和可穿戴產品的運行時間。
GPS/GNSS Receiver
Features
- Low power consumption
Newly developed high-frequency analog circuits such as dedicated low power consumption A/D converter, low noise amplifier, and phase synchronization circuits, and optimal power control and low power consumption circuits achieve operation with the lowest power consumption level in the industry. This enables GPS/GNSS positioning even by products that operate using solar cells.

- Positioning performance
GPS/GNSS receiver design has faced many challenges since PND (Personal Navigation Device). It started with the need to provide an accurate position in the urban area since the main application was a handheld device fixed on the dashboard of a vehicle. Once feature phones and smartphones started to penetrate the market, E-911 and LBS (Location-based services) began to emerge. E-911 demanded TTFF and sensitivity, while LBS applications demanded power consumption and positioning accuracy. The two main challenges were multipath and weak signal acquisition and tracking.


The rise of wearable devices and the need for an embedded GNSS chip add a new set of challenges. The wearable device is more prone to ground reflections, multipath reflection from short distances, disruptive dynamics due to arm swinging; and deep attenuation due to limited visibility and device orientation on the armrest.

The received signal strength for the IoT and wearable products is quite weak compared to conventional products that use GPS for other applications (e.g., car navigation systems). A primary reason might be due to the performance of the low-cost antenna and operating environment. In addition, the received signal condition might be degraded further for wearable devices due to the influence of the user's arm movements among other use case factors.

Sony Semiconductor Solutions GPS/GNSS receiver/processor chips use a proprietary positioning algorithm to enable good positioning performance even under these harsh conditions.

- Space-saving (small area)

Use of a compact package realizes a positioning system with an area of 70 to 100 mm2 or less, including peripheral circuits.

Applications
GPS watches, cameras, wearable products, monitoring, and healthcare products


*Sony Authorized Distributor
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