Searching Data in Sqlite database with php

I'm trying to get the name of my session, and search the database for the data of who has this name, but echo does not return anything at all.

$nome = $_SESSION["Aluno"];


$results = $db->query('Select * from alunos where nome = $nome ');
while($row = $results->fetchArray()){
$row = (object) $row;
echo $row->nome."   /   ";
echo $row->disciplina."   / ";
echo $row->faltas." /  ";
echo $row->nota."     <br> ";
echo "----------"."<br>";

}

What am I doing wrong?