发明名称 |
Differential amplifier with hysteresis |
摘要 |
A current source is selectively switched into the output circuit of a differential amplifier for producing hysteresis. In a circuit embodying the invention, a differential amplifier (diff-amp) stage operated at a first current level set by a first current source has first and second input terminals for the application therebetween of a differential input signal and first and second output nodes for the production of differential output signals. A second current source for inducing hysteresis is connected to one of the output nodes of the diff-amp and is selectively enabled. A differential input signal (VIN) is applied across the input terminals. When VIN varies in one direction and reaches a first threshold level, the second, hysteresis inducing, current source is enabled whereby a larger current can flow in the one node. VIN then has to vary in the opposite direction and reach a second threshold level to disable the second current source. When the first threshold level is reached the output of the amplifier stage switches from a first state to a second state and when the second threshold level is reached the output of the amplifier switches from the second state to the first state.
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申请公布号 |
US5367211(A) |
申请公布日期 |
1994.11.22 |
申请号 |
US19930082546 |
申请日期 |
1993.06.28 |
申请人 |
HARRIS CORPORATION |
发明人 |
GIORDANO, RAYMOND L.;ISHAM, ROBERT H.;LEIDICH, ARTHUR J. |
分类号 |
H03K3/0233;(IPC1-7):H03K5/22 |
主分类号 |
H03K3/0233 |
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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