-color-options">Color
        Options</a></li>
        </ul></li>
        <li><a href="#controls" id="toc-controls">Controls</a></li>
        <li><a href="#block-diagram" id="toc-block-diagram">Block
        Diagram</a></li>
        <li><a href="#parameters" id="toc-parameters">Parameters</a>
        <ul>
        <li><a href="#gain" id="toc-gain">Gain</a></li>
        <li><a href="#oscillator"
        id="toc-oscillator">Oscillator</a></li>
        <li><a href="#filter" id="toc-filter">Filter</a></li>
     