<div ng-app="app" ng-controller="parentCtr">
  <div ng-controller="childCtr1">name :
    <input ng-model="name" type="text" ng-change="change(name);" />
  </div>
  <div ng-controller="childCtr2">Ctr1 name:
    <input ng-model="ctr1Name" />
  </div>
</div>

angular.module("app", []).controller("parentCtr",
function ($scope) {
  $scope.$on("Ctr1NameChange",
  function (event, msg) {
    console.log("parent", msg);
    $scope.$broadcast("Ctr1NameChangeFromParrent", msg);
  });
}).controller("childCtr1", function ($scope) {
  $scope.change = function (name) {
    console.log("childCtr1", name);
    $scope.$emit("Ctr1NameChange", name);
  };
}).controller("childCtr2", function ($scope) {
  $scope.$on("Ctr1NameChangeFromParrent",
  function (event, msg) {
    console.log("childCtr2", msg);
    $scope.ctr1Name = msg;
  });
});