发明名称 |
Self biased differential amplifier with hysteresis |
摘要 |
A self biased differential amplifier has a switching point accurately set according to a reference voltage. DC hysteresis is provided, by a circuit internal to the differential amplifier. The amplifier has an input circuit having first and second series connected transistors, wherein the beta ratio of these first and second transistors is changed by enabling an additional transistor of a hysteresis circuit according to an output state of the differential amplifier. When the output state is "high", the switching point is decreased in order that temporary small drops (due to noise or glitches) in the input signal are ignored. Conversely, when the output state is "low", the switching point is increased in order that temporary small increases in the input signal are ignored.
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申请公布号 |
US6118318(A) |
申请公布日期 |
2000.09.12 |
申请号 |
US19970853963 |
申请日期 |
1997.05.09 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
FIFIELD, JOHN A.;HELLER, LAWRENCE G. |
分类号 |
H03K3/3525;(IPC1-7):H03K3/295;H03K19/094 |
主分类号 |
H03K3/3525 |
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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