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System and method of frequency synthesis to avoid gaps and VCO pulling in direct broadcast statelite systems
System and method of frequency synthesis to avoid gaps and VCO pulling in direct broadcast statelite systems
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机译:频率合成的系统和方法,以避免在直播卫星系统中出现间隙和VCO拉动
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摘要
A system and method for designing a broadband tuner such that VCO pulling is minimized and gaps in frequency coverage are avoided, while total power consumption is reduced, is disclosed. A broadband spectrum is divided into sub-bands and various multipliers to a local oscillator output are introduced. In this fashion, the present invention allows a local oscillator within the broadband tuner to always generate signals that lie outside of the broadband spectrum for a particular broadband application. Additionally, a modulus ratio for a dual modulus prescaler with the local oscillator is maximized, thereby reducing power consumption.
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