公开(公告)号：US06927559B2

公开(公告)日：2005-08-09

申请号：US10723780

申请日：2003-11-24

申请人： Hiroshi Tanigawa ,  Satoru Yamane

发明人： Hiroshi Tanigawa ,  Satoru Yamane

IPC分类号： G05F3/26 ,  G05F1/10 ,  G05F1/56 ,  G05F1/575 ,  H03F3/345 ,  H03K17/687 ,  G05F3/16

CPC分类号： G05F1/575

摘要： Disclosed is a constant voltage power supply, which comprises an error amplifier VEA including a transistor M3, and a transistor M4 having the same ratio between channel width and channel length as that of the transistor M3. The gate and source of the transistor M4 are connected to the gate of a transistor M3 to form a current mirror circuit in conjunction with the transistor M3. Further, the drain of the transistor M4 is connected with a transistor M5 adapted to be switched in response to an external control signal Sg. For example, when the transistor M5 is in ON state, any signal amplification function of the transistor M3 is vanished away, and the gain of the error amplifier VEA is lowered. The circuit configuration for changing the gain of the error amplifier VEA makes it possible to strike a balance between high-speed response characteristic in an active mode and operational stability in a sleep mode, and reduce a circuit area required for being formed on an integrated circuit.

摘要翻译： 公开了一种恒压电源，其包括包括晶体管M 3的误差放大器VEA和具有与晶体管M 3的沟道宽度和沟道长度相同的比率的晶体管M 4。晶体管的栅极和源极 M 4连接到晶体管M 3的栅极，以与晶体管M 3结合形成电流镜电路。此外，晶体管M 4的漏极与适于被响应于 外部控制信号Sg。 例如，当晶体管M5处于导通状态时，晶体管M 3的任何信号放大功能消失，误差放大器VEA的增益降低。 用于改变误差放大器VEA的增益的电路配置使得有可能在活动模式中的高速响应特性和睡眠模式下的操作稳定性之间取得平衡，并且减少在集成电路上形成的电路面积 。

公开(公告)号：US07057448B2

公开(公告)日：2006-06-06

申请号：US10858760

申请日：2004-06-01

申请人： Hiroshi Tanigawa ,  Shuichi Nakamura ,  Satoru Yamane

发明人： Hiroshi Tanigawa ,  Shuichi Nakamura ,  Satoru Yamane

IPC分类号： G05F1/10

CPC分类号： G05F3/262

摘要： Disclosed is a variable output-type constant current source circuit capable of varying its output current in a stepwise manner without the complication in circuit configuration and the increase in size of a semiconductor circuit board for incorporating the circuit therein. The constant current source circuit comprises a first self-biasing type constant current circuit 3a configured such that transistors M1, M2 are operable to cooperatively supply a given voltage across a resistor RS to generate a stabilized current IR1. In order to vary the output current, the constant current source circuit includes a switching circuit 5 (transistor M5) connected in series to a series circuit connecting in series the transistor M1 and the resistor RS, and a second constant current circuit 4 connected in parallel to a series circuit connecting in series the transistor M1, the resistor RS and the transistor M5. The second constant current circuit 4 is also configured to serve as an activation circuit for the first constant current circuit 3a.

摘要翻译： 公开了一种可变输出型恒流源电路，其能够以逐步的方式改变其输出电流，而不会在电路配置中出现并发症，并且用于在其中并入电路的半导体电路板的尺寸增加。 恒流源电路包括第一自偏置型恒流电路3a，其被配置为使得晶体管M 1，M 2可操作以协同地在电阻器RS上提供给定电压以产生稳定电流I SUB>。 为了改变输出电流，恒流源电路包括与晶体管M 1和电阻RS串联连接的串联电路串联连接的开关电路5（晶体管M5）和连接的第二恒流电路4 与串联连接晶体管M 1，电阻RS和晶体管M 5的串联电路并联。 第二恒流电路4还被配置为用作第一恒流电路3a的激活电路。