Patent ID: 8689569
Filing Date: 2014-04-08
Classification: G05D

Abstract:
1. A cooling control circuit for a Peltier element, the cooling control circuit comprising: a current detection resistor used to detect current flowing to the Peltier element and including a first terminal, which is connected to the Peltier element, and a second terminal; a first amplification circuit including: a second amplification circuit including: a current control circuit that receives output voltage of the second amplification circuit when the ambient temperature is greater than or equal to a predetermined temperature and controls the current flowing to the Peltier element so as to be constant based on the output voltage of the second amplification circuit, and receives output voltage of the first amplification circuit that is in accordance with the temperature characteristics of the thermistor when the ambient temperature is less than the predetermined temperature and controls the current flowing to the Peltier element based on the output voltage of the first amplification circuit.