| 摘要 |
A temperature control apparatus that performs stabile temperature control operation, besides avoiding generation of unwanted noise. A thermo-control device cools or heats an object according to a supply current that a thermo-control driver provides according to a specified control voltage. A temperature sensor observes the temperature of the object. A variable voltage controller varies the control voltage such that the observed temperature of the object will be a specified reference temperature. The variable voltage controller begins to operate in alternate setting mode when the control voltage is expected to enter a voltage range in which the thermo-control driver could malfunction. During that mode, the variable voltage controller outputs a first control voltage and a second control voltage alternately at predetermined intervals. The first and second control voltages are malfunction-free voltages near the malfunction-prone voltage range.
|
