发明名称 |
One-terminal type level control circuit |
摘要 |
A constant-current source transistor, which exhibits a constant-current characteristic corresponding to the power source voltage of a sensor and is connected to an input signal terminal of an input circuit, such as a microprocessor. A first transistor is connected so that it may supply a current from the power source of the input circuit to the constant-current source transistor, and a second transistor is connected in parallel to the constant-current source transistor. When the signal level at the input signal terminal exceeds a predetermined value, the second transistor is turned ON to effect level control so the input signal level may not become excessively high and damage the input circuit.
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申请公布号 |
US4476426(A) |
申请公布日期 |
1984.10.09 |
申请号 |
US19820384633 |
申请日期 |
1982.06.03 |
申请人 |
FUJITSU TEN LIMITED;FIJITSU LIMITED |
发明人 |
KISHIMOTO, SATORU;ATSUMI, MASAHARU;SANO, YOSHIAKI |
分类号 |
H03G3/02;H02H9/04;H03G11/00;H03K5/00;H03K5/003;(IPC1-7):H02H9/04 |
主分类号 |
H03G3/02 |
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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