发明公开
EP0945774A1 Reference voltage generation circuit providing a stable output voltage
有权
Bezugsspannungs发电机稳定器Ausgangs-Spannung
- 专利标题： Reference voltage generation circuit providing a stable output voltage
- 专利标题（中）： Bezugsspannungs发电机稳定器Ausgangs-Spannung
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申请号： EP99106053.4申请日： 1999-03-25
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公开(公告)号： EP0945774A1公开(公告)日： 1999-09-29
- 发明人: Kobatake, Hiroyuki
- 申请人： NEC CORPORATION
- 申请人地址： 7-1, Shiba 5-chome, Minato-ku Tokyo JP
- 专利权人： NEC CORPORATION
- 当前专利权人： NEC CORPORATION
- 当前专利权人地址： 7-1, Shiba 5-chome, Minato-ku Tokyo JP
- 代理机构： Glawe, Delfs, Moll & Partner
- 优先权： JP7789898 19980325
- 主分类号： G05F3/16
- IPC分类号： G05F3/16
摘要：
A reference voltage generation circuit includes a first current mirror (CM1) including first through third transistors (P1, P2, P3) with the second transistor (P2) on a reference side thereof, a second current mirror (CM4) including fourth and fifth transistors (N1, N2) connected in series with the first and the second transistors (P1, P2), respectively, and a voltage control block (Vsd1, Vsd2) for controlling the source-drain voltages the transistors (P1, P3) on the output side of the first current mirror (CM1). The voltage control block includes a first control block (Vsd1) having a configuration similar to the first current mirror (CM1), and a second control block (Vsd2) having a configuration similar to the second current mirror (CM4), both of which are connected between the first current mirror (CM1) and the second current mirror (CM2), with corresponding transistors connected in series. A stable output voltage can be obtained irrespective of variations in the potential of the voltage source (Vdd) for the reference voltage generation circuit.
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