发明名称 |
Zero temperature coefficient (TC) current source for diode measurement |
摘要 |
A method and circuit for reducing a temperature dependent error in p-n junction based temperature measurements. The temperature-dependent error may be caused by parasitic resistance in a p-n junction and temperature dependent variation of a bias current in a temperature sensor. A difference in base-emitter voltage of a sensing transistor is employed to determine a temperature of a source device. In one embodiment, a zero Temperature Coefficient (TC) current source employing a temperature dependent variation of a current generates by an emitter-base voltage across a resistor between the emitter and the base of a junction transistor is used to counter balance a Proportional To Absolute Temperature (PTAT) current source.
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申请公布号 |
US7150561(B1) |
申请公布日期 |
2006.12.19 |
申请号 |
US20040943131 |
申请日期 |
2004.09.16 |
申请人 |
NATIONAL SEMICONDUCTOR CORPORATION |
发明人 |
D'AQUINO DAN;ASLAN MEHMET |
分类号 |
G01K7/00 |
主分类号 |
G01K7/00 |
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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