发明名称 |
Bar code reader with diode feedback in amplifier |
摘要 |
An operational amplifier is disclosed having a phototransistor at its input for reading a bar code wherein the saturation point of an operational amplifier is controlled by a clamping feedback voltage having a positive control controlling the saturation point of the operational amplifier while prohibiting the operational amplifier from reaching its saturation point.
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申请公布号 |
US4578576(A) |
申请公布日期 |
1986.03.25 |
申请号 |
US19830480384 |
申请日期 |
1983.03.30 |
申请人 |
OPTO SYSTEMS, INC. |
发明人 |
WHEELER, JAY A.;WILLMORE, JAMES A. |
分类号 |
H03F1/34;H03F3/08;H03K5/02;(IPC1-7):H01J40/14;H03F1/36 |
主分类号 |
H03F1/34 |
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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