发明授权
- 专利标题: Output circuit having at least one external transistor
- 专利标题(中): 输出电路具有至少一个外部晶体管
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申请号: US413947申请日: 1995-03-30
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公开(公告)号: US5663673A公开(公告)日: 1997-09-02
- 发明人: Hirokazu Tanaka , Tatsuo Kumano , Tetsuji Funaki , Takahiro Watai
- 申请人: Hirokazu Tanaka , Tatsuo Kumano , Tetsuji Funaki , Takahiro Watai
- 申请人地址: JPX Kawasaki
- 专利权人: Fujitsu Limited
- 当前专利权人: Fujitsu Limited
- 当前专利权人地址: JPX Kawasaki
- 优先权: JPX6-149361 19940630; JPX7-040406 19950228
- 主分类号: H03G5/16
- IPC分类号: H03G5/16 ; H03F1/30 ; H03F3/30 ; H03F3/45 ; H04M19/00 ; H03F3/26 ; H03K17/16
摘要:
An output circuit, for minimizing output idle current fluctuations and improve the output voltage range, has first and second transistors connected to first and second power sources, with a plurality of diodes connected to control terminals of the first and second transistors. The output circuit further includes a third transistor having a first terminal connected to the second power source and a second terminal connected to a predetermined position among the plurality of diodes. A predetermined voltage is applied from the diodes to the control terminal of the first transistor when the third transistor is saturated, to bring a level of an output of said output circuit close to a level of the second power source. A fourth transistor, a fifth transistor, a first resistor, and a capacitor are also provided. The forth transistor has a control terminal connected to an output of a differential circuit, and a first terminal connected to the second power source through the first resistor as well as to the control terminals of the third and fifth transistors. A second terminal is connected to the first power source, with the fifth transistor having a first terminal connected to the second power source and a second terminal connected to the control terminal of the second transistor. The capacitor is connected between the control terminal of the fourth transistor and the second terminal of the fifth transistor. This output circuit also limits the output voltage without changing the impedance of the high-impedance input.
公开/授权文献
- US6152836A Golf ball with a cover which includes polyurethane rubber 公开/授权日:2000-11-28