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Page 8 of 11

Issue A

LANSDALE Semiconductor, Inc.

ML12179

1k

10k

100k

1M

10M

40M

170

150

100

50

0

125

75

25

(f) [dBc/Hz] vs f[Hz]

HP 3048A

CARRIER

2200MHz

Figure 13. VCO Output Spectrum with ML12179, VCC = 5.0 V

(ECLiPTEK 8.9 MHz Crystal and ZCOM 2500 VCO)

Figure 14. Typical Phase Noise Plot, 2200 MHz VCO

(With the ML12179 in a Closed Loop)

NOTE: Spurs can be reduced further by narrowing the loop bandwidth of the PLL loop filter and/or

adding an extra filter (Rx/Cx)

Legacy Applications Information