investigate the possibility of using an IC temperature sensor for a digital fan controller

Question
John, a technical applications engineer at a manufacturing company, has been asked to investigate the possibility of using an IC temperature sensor for a digital fan controller. To do so, he will need general information regarding IC temperature sensors. You are requested to help him by developing a three-page, double spaced description of any three types of IC temperature sensors that are commercially available. In your three-page description of sensors, please make sure to provide the following information:

• The make of each of the three types
• The manufacturer of each of the three types
• A summary of the key operational characteristics of each of the three types
• A brief summary of the different applications in which each of the three types may be used.