Invention Grant
US07995971B2 Method and system for clocking FM transmit FM receive, and near field communication functions using DDFS 有权
使用DDFS对FM发送FM接收和近场通信功能进行定时的方法和系统

Method and system for clocking FM transmit FM receive, and near field communication functions using DDFS
Abstract:
Methods and systems for clocking FM transmit, FM receive and near field communication functions using DDFS are disclosed. Aspects of one method may include generating a Bluetooth signal that may comprise, for example, I and Q components, or Bluetooth local oscillator (LO) signals, for use in Bluetooth communication. One of the two Bluetooth LO signals may then be used by a DDFS to generate I and Q LO signals for FM reception and/or transmission. One of the I and Q LO signals for FM communication may be used by another DDFS to generate at least one LO signal for near field communication (NFC) transmission and/or reception. While the Bluetooth LO signal may vary in frequency as Bluetooth frequency hopping occurs, the FM LO signals may remain constant for a specific channel frequency. Similarly, while the FM LO signals may be changed to tune to different FM channels, the NFC LO signals may remain at a constant frequency.
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