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公开(公告)号：EP0372956A1
公开(公告)日：1990-06-13
申请号：EP89312758.9
申请日：1989-12-07
申请人： FUJITSU LIMITED
IPC分类号： G05F3/20
CPC分类号： G05F3/20
摘要： A constant current source circuit includes a current mirror circuit (4) supplying a load circuit (5) with an output current (Io) which is regulated on the basis of a reference current (Iref), a transistor (1) having an emitter, a collector connected to a first power source (V DD ), and a base coupled to the current mirror circuit, and a resistor (2) coupled between the emitter and base. The reference current passes through the resistor. A current control circuit (3) controls a current directed to a second power source (GND) in accordance with a bias voltage. The above current consists of the reference current and a collector current (Ic) passing through the transistor. A bias circuit (6) having a current path derives the bias voltage from a current (I P ) passing from the first power source to the second power source through the current path.
摘要翻译： 恒流源电路包括电流镜电路（4），用于向负载电路（5）提供基于参考电流（Iref）调节的输出电流（Io），具有发射极的晶体管（1） 连接到第一电源（VDD）的集电极和耦合到电流镜电路的基极以及耦合在发射极和基极之间的电阻器（2）。 参考电流通过电阻。 电流控制电路（3）根据偏置电压来控制指向第二电源（GND）的电流。 上述电流由参考电流和通过晶体管的集电极电流（Ic）组成。 具有电流路径的偏置电路（6）从通过电流路径从第一电源通过第二电源的电流（IP）导出偏置电压。
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公开(公告)号：EP0372956B1
公开(公告)日：1995-08-23
申请号：EP89312758.9
申请日：1989-12-07
申请人： FUJITSU LIMITED
IPC分类号： G05F3/20
CPC分类号： G05F3/20
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公开(公告)号：EP1530293A2
公开(公告)日：2005-05-11
申请号：EP05002168.2
申请日：2000-03-29
申请人： FUJITSU LIMITED
IPC分类号： H03K3/0231 , H03K19/003
CPC分类号： H03K5/082 , H03K3/0231 , H03K3/03 , H03K3/0322 , H03K5/2481 , H03K5/249 , H03K19/0027 , H03K2217/0018
摘要： A voltage controller oscillator circuit includes first and second chopper comparators (120,121), a capacitor (122), first and second current sources (123,124) and a converter circuit (125) for making the current sources (123,124) to generate a current (I) proportionate to an input voltage (Vin). The voltage controlled oscillator circuit further includes first and second switches (126,127) and an inverter (128) for controlling on/off of the current sources (123,124). A logic circuit (129) latches the output signals of the comparators (120,121), outputs the output voltage (Vout) that serves as an oscillation signal of the voltage controlled oscillator and generates clock signals (φ1,φ2) for switching operation of the chopper comparators (120,121).
摘要翻译： 电压控制器振荡器电路包括用于使电流源（123,124）产生电流（I）的第一和第二斩波比较器（120,121），电容器（122），第一和第二电流源（123,124）和转换器电路（125） ）与输入电压（Vin）成比例。 压控振荡器电路还包括用于控制电流源（123,124）的开/关的第一和第二开关（126,127）和反相器（128）。 逻辑电路（129）锁存比较器（120,121）的输出信号，输出用作压控振荡器的振荡信号的输出电压（Vout），并产生用于切换斩波器操作的时钟信号（φ1，φ2） 比较器（120,121）。
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公开(公告)号：EP1530293B1
公开(公告)日：2007-01-24
申请号：EP05002168.2
申请日：2000-03-29
申请人： FUJITSU LIMITED
IPC分类号： H03K3/0231 , H03K19/003
CPC分类号： H03K5/082 , H03K3/0231 , H03K3/03 , H03K3/0322 , H03K5/2481 , H03K5/249 , H03K19/0027 , H03K2217/0018
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公开(公告)号：EP1530293A3
公开(公告)日：2005-05-18
申请号：EP05002168.2
申请日：2000-03-29
申请人： FUJITSU LIMITED
IPC分类号： H03K3/0231 , H03K19/003
CPC分类号： H03K5/082 , H03K3/0231 , H03K3/03 , H03K3/0322 , H03K5/2481 , H03K5/249 , H03K19/0027 , H03K2217/0018
摘要： A voltage controller oscillator circuit includes first and second chopper comparators (120,121), a capacitor (122), first and second current sources (123,124) and a converter circuit (125) for making the current sources (123,124) to generate a current (I) proportionate to an input voltage (Vin). The voltage controlled oscillator circuit further includes first and second switches (126,127) and an inverter (128) for controlling on/off of the current sources (123,124). A logic circuit (129) latches the output signals of the comparators (120,121), outputs the output voltage (Vout) that serves as an oscillation signal of the voltage controlled oscillator and generates clock signals (ϕ1,ϕ2) for switching operation of the chopper comparators (120,121).
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