Multichannel radio device, a radio communication system, and a f

Details Multichannel radio device, a radio communication system, and a f Multichannel radio device, a radio communication system, and a f

1998-08-11

2000-07-25

Hunter, Daniel S.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455260, 455265, 455264, 455 76, 331 2, 331 11, 375376, H04Q 720

Patent

active

060945699

ABSTRACT:
A new architecture for such a type of synthesizer is proposed not having the drawbacks of such known synthesizers and having the same phase noise properties as ordinary integer divide by N synthesizers. The novel architecture has a main PLL with a first integer frequency divider in its feedback loop and further an auxiliary PLL having a second integer frequency divider in its feedback loop.

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"SA8025 Fractional-N Synthesizer for 2GHZ Band Applications" Philips Semiconductors Sep. 18, 1994. pp. 7-76-7-89.
By T. A. D. Riley et al, "Delta-Sigma Modulation in Fractional-N Frequency Synthesis", IEEE Journal of Solid State Circuits, vol. 28, No.5, pp. 553-559.
By Roland E. Best "Phase Locked Loops", McGraw-Hill 1993, pp. 139, 143-145.

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