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<!DOCTYPE model SYSTEM "/usr/local/vamdoc-1.0.2-kluwer/config/model.dtd"><model>
  <symbol>../symbol/vcod.png</symbol>
  <comments>
    <title>Voltage controlled oscillator</title>
    <model_name>VCO(DIGITAL)</model_name>
    <library>N/A</library>
    <structure>N/A</structure>
    <description>The test-bench describes a voltage controlled oscillator<br></br>which includes an analog and a digital architecture.<br></br>The analog realization uses a sine wave with tunable frequency<br></br>while the digital realization uses a process that produces<br></br>a square wave.<br></br></description>
    <link_source><A HREF="../src/vcod.vhd">See source code</A></link_source>
    <dependency>
      <library>IEEE_proposed</library>
      <design_unit>ELECTRICAL_SYSTEMS</design_unit>
    </dependency>
    <dependency>
      <library>IEEE</library>
      <design_unit>MATH_REAL</design_unit>
    </dependency>
  </comments>
  <interface>
    <parameter>
      <name>DC</name>
      <type>REAL</type>
      <default>0.0</default>
      <unit>V</unit>
      <comment> dc offset of oscillator </comment>
    </parameter>
    <parameter>
      <name>AMPL_DBM</name>
      <type>REAL</type>
      <default>-100.0</default>
      <unit>dBm</unit>
      <comment> amplitude of sine wave </comment>
    </parameter>
    <parameter>
      <name>FREQ_0</name>
      <type>REAL</type>
      <default>1.0E03</default>
      <unit>Hz</unit>
      <min> &gt;0.0</min>
      <comment> free running frequency </comment>
    </parameter>
    <parameter>
      <name>PHASE_0</name>
      <type>REAL</type>
      <default>0.0</default>
      <unit>rad</unit>
      <comment> constant phase offset </comment>
    </parameter>
    <parameter>
      <name>K_FREQ</name>
      <type>REAL</type>
      <default>1.0E06</default>
      <unit>Hz/V</unit>
      <comment> sensitivity of voltage input </comment>
    </parameter>
    <parameter>
      <name>RIN</name>
      <type>REAL</type>
      <default>50.0</default>
      <unit>Ohm</unit>
      <min> &gt;0.0</min>
      <comment> input resistance </comment>
    </parameter>
    <parameter>
      <name>ROUT</name>
      <type>REAL</type>
      <default>50.0</default>
      <unit>Ohm</unit>
      <min> &gt;0.0</min>
      <comment> output resistance </comment>
    </parameter>
    <port>
      <port_id>terminal</port_id>
      <name>P_CTRL</name>
      <port_type>ELECTRICAL</port_type>
      <comment> control pin</comment>
    </port>
    <port>
      <port_id>terminal</port_id>
      <name>P_OUT</name>
      <port_type>ELECTRICAL</port_type>
      <comment> output pin </comment>
    </port>
    <port>
      <port_id>terminal</port_id>
      <name>VDD</name>
      <port_type>ELECTRICAL</port_type>
      <comment> supply voltage</comment>
    </port>
    <port>
      <port_id>terminal</port_id>
      <name>GND</name>
      <port_type>ELECTRICAL</port_type>
      <comment> reference pin</comment>
    </port>
  </interface>
</model>
