发明名称 |
LOW VOLTAGE LOCKOUT CIRCUIT |
摘要 |
An integrated circuit is shown in which provision is made for terminating or locking out the operating circuitry when the supply voltage has fallen below a level that can cause anomalous or unreliable operation. Certain selected transistors are provided with saturation sensors which operate to produce a current when the transistors go into collector saturation. When any of the sensors indicates the onset of saturation, clamping circuitry is energized to provide lock out. In addition, a temperature compensated dummy bandgap circuit is included to sense extremely low supply voltages and provide the lockout function under conditions where a reliable saturation indication might not be available.
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申请公布号 |
US5122920(A) |
申请公布日期 |
1992.06.16 |
申请号 |
US19880236110 |
申请日期 |
1988.08.22 |
申请人 |
NATIONAL SEMICONDUCTOR CORPORATION |
发明人 |
PEASE, ROBERT A. |
分类号 |
H03K19/003;H03K17/22;H03K17/24;H03K17/30 |
主分类号 |
H03K19/003 |
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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