APN1005 PDF VIEW DOWNLOAD, APN1005 データシート

APN1005 データシートの表示（PDF） - Skyworks Solutions

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APN1005

A Balanced Wideband VCO for Set-Top TV Tuner Applications

Skyworks Solutions

APN1005 Datasheet PDF : 11 Pages

1 2 3 4 5 6 7 8 9 10

APPLICATION NOTE • APN1005

Table 3 shows the bill of materials used.

Designators

R10

R11

Comment

0603AU100JAT9 (AVX)

0603AU101JAT9 (AVX)

0603AU102JAT9 (AVX)

SMV1265-011 (Skyworks)

LL1608-F33NJ (TOKO)

CR10-330J-T (AVX)

CR10-242J-T (AVX)

CR10-102J-T (AVX)

CR10-330J-T (AVX)

CR10-121J-T (AVX)

CR10-821J-T (AVX)

CR10-510J-T (AVX)

CR10-102J-T (AVX)

NE68119 (NEC)

Table 3. Bill of Materials

Footprint

0603

SOD-323

0603

SOT-416

Figure 9 shows the PCB layout. The board is made of standard FR4

material 30 mils thick.

The results measured with the circuit in Figure 8, as well as the

simulated results obtained with the model in Figure 9, are shown

in Figures 10 and 11.

Note: The simulated tuning curve in Figure 10 agrees with mea-

sured data, which proves the effectiveness of the above piece-wise

approximation technique.

Note: In the middle of the tuning range there is disagreement

between our model and the measured results. This could be attrib-

uted to the imperfection of the model, which is highly sensitive to

the way different parasitic effects are treated. The other problem of

modeling this oscillator case was the convergence of the harmonic

balance. To facilitate convergence in this case, we kept the number

of harmonics to at least five. The sweeping frequency range is rec-

ommended to keep as close to the oscillation point as possible —

especially when analyzing the middle band area.

In Figure 11, the power response modeled at 7 V was very close to

the measurement. Higher measured power is attributed to the ana-

lyzer calibration (the calibration error of the analyzer is known to be

within a couple of decibels). The general trend of the simulated

results reflects the real VCO response almost exactly, which clearly

demonstrates the model’s effectiveness.

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com

July 21, 2005 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • 200314 Rev. A

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