| 摘要 |
<p>A frequency synthesizer provides first and second frequency output signals based on first and second control signals, respectively. The first control signal determines the frequency of the first output signal produced by a main frequency synthesizer. The second control signal determines the frequency of a variable offset frequency signal produced by a programmable offset frequency synthesizer. A mixer combines this variable offset frequency signal with the first output signal to produce the second output signal. As such, the second output signal has a programmable variable offset frequency relationship with first output signal. First and second control signals are independently controllable. A mobile terminal may advantageously use the frequency synthesizer to generate a receiver injection signal and a transmitter carrier generation signal having a variable frequency offset relationship. Such capability permits the mobile terminal to operate within a wireless communications system employing statistical voice multiplexing techniques wherein dynamic communication channel reassignments require the mobile terminal to independently adjust its receive and transmit frequencies.</p> |
