ATA5749_09 ATMEL [ATMEL Corporation], ATA5749_09 Datasheet - Page 11
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ATA5749_09
Manufacturer Part Number
ATA5749_09
Description
Fractional-N PLL Transmitter IC
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.ATA5749_09.pdf
(26 pages)
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5. Pulling of Frequency due to ASK Modulation (PA Switching)
9128D–RKE–01/09
The switching effect on VCO frequency in ASK Mode is very low if a correct PCB layout and
decoupling is used. Therefore, power ramping is not needed to achieve a clean spectrum (see
Figure
Figure 5-1.
5-1).
Typical RF Spectrum of 40 kHz ASK Modulation at Pout = 12.5 dBm
ATA5749 [Preliminary]
11
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