发明名称 |
Temperature control device |
摘要 |
A thermostatic-chamber temperature control device includes: a heating element for heating a thermostatic chamber; a bridge circuit having a temperature sensitive element whose resistance value varies in accordance with the temperature of the heating element; a detection circuit for detecting an unbalanced voltage of the bridge circuit; a PWM signal generating circuit for generating a PWM signal corresponding to the unbalanced voltage detected by the detection circuit; and a switching element that has a current output terminal connected to the heating element and a current input terminal connected to a power supply circuit and is driven on the basis of the PWM signal generated by the PWM signal generating circuit. |
申请公布号 |
US8183940(B2) |
申请公布日期 |
2012.05.22 |
申请号 |
US20090549658 |
申请日期 |
2009.08.28 |
申请人 |
KOYAMA YOSHITO;HIRAHARA MINORU;NAKAMUTA KOJI;FUJITSU LIMITED |
发明人 |
KOYAMA YOSHITO;HIRAHARA MINORU;NAKAMUTA KOJI |
分类号 |
H03L1/04 |
主分类号 |
H03L1/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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