HMC702LP6CE Datasheet, PDF (10/38 Pages) Hittite Microwave Corporation – 14 GHz 16-Bit Fractional-N Synthesizer

v10.0812
HMC702LP6CE
14 GHz 16-BIT FRACTIONAL-N PLL

Figure 4. Reference Path Block Diagram
VCO Path
The RF path from the VCO to the phase detector, is referred to as the VCO path. The VCO path consists of an input
isolation buffer and a multi-modulus prescaler, or simply the N divider. The N divider is controlled by the fractional
modulator. This path operates with inputs directly from the external VCO.
RF Input Stage
The synthesizer RF input stage routes the external VCO to the phase detector via a 16-bit fractional divider. The input
is protected by ESD diodes as shown in Figure 5.
Figure 5. RF Input Stage
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