公开(公告)号：US5030897A

公开(公告)日：1991-07-09

申请号：US448857

申请日：1989-12-12

申请人： Kenzi Ohtani ,  Michihiko Hayashi

发明人： Kenzi Ohtani ,  Michihiko Hayashi

IPC分类号： H02P6/08 ,  H02P6/00

CPC分类号： H02P6/28

摘要： A driving current control circuit capable of controlling the logarithmic base current of two transistors in a current driver to control a drive current for a motor. This control circuit controls the current of the current regulator depending on a control signal, thereby controlling the driving current for the transistors in the current driver. The control circuit includes an output current mirror composed of two output-side transistors and a single input-side transistor. The two output-side transistors control the inflow and outflow of the driving current for the current driver. A single phase compensating condenser is connected to the input-side transistor. This arrangement makes the entire circuit simple and compact and causes an improved controlling characteristic.

摘要翻译： 一种驱动电流控制电路，其能够控制电流驱动器中的两个晶体管的对数基极电流，以控制电动机的驱动电流。 该控制电路根据控制信号控制电流调节器的电流，从而控制当前驱动器中的晶体管的驱动电流。 控制电路包括由两个输出侧晶体管和单个输入侧晶体管组成的输出电流镜。 两个输出侧晶体管控制当前驱动器的驱动电流的流入和流出。 单相补偿电容器连接到输入侧晶体管。 这种布置使得整个电路简单紧凑，并且导致改进的控制特性。

公开(公告)号：US5014020A

公开(公告)日：1991-05-07

申请号：US448953

申请日：1989-12-12

申请人： Michihiko Hayashi ,  Kenzi Ohtani

发明人： Michihiko Hayashi ,  Kenzi Ohtani

IPC分类号： H02P29/00 ,  H03F1/02

CPC分类号： H03F1/0261

摘要： A motor controlling circuit used for controlling the drive of a motor, and particularly to improvements of the control characteristics of the amplifier. A current setting transistor for setting an amount of current flowing from a differential amplifier to a predetermined value is disposed on the downstream side of the differential amplifier. The amount of current flowing across this current setting transistor is varied in response to the level of an input signal to the amplifier, so that the current outputting capability of the differential amplifier is proportional to the level of the input signal. Accordingly, when the level of the input signal is small, the gain of the amplifier is made small, and a gain for an amount of ripple at that time is also made small. Hence, it is possible to control an adverse effect of the ripple carried on the input signal when the level of the input signal is small. In addition, it is possible to eliminate an output current when the level of the input signal is zero, thereby controlling the generation of an error current due to an offset.

摘要翻译： 用于控制电动机的驱动的电动机控制电路，特别是改善放大器的控制特性。 用于将从差分放大器流动的电流量设定为预定值的电流设置晶体管设置在差分放大器的下游侧。 流过该电流设定晶体管的电流量响应于放大器的输入信号的电平而变化，使得差分放大器的电流输出能力与输入信号的电平成比例。 因此，当输入信号的电平小时，放大器的增益变小，并且此时的纹波量的增益也变小。 因此，当输入信号的电平较小时，可以控制输入信号纹波的不利影响。 此外，当输入信号的电平为零时，可以消除输出电流，从而控制由偏移引起的误差电流的产生。