公开(公告)号：US06677589B2

公开(公告)日：2004-01-13

申请号：US10090825

申请日：2002-03-06

申请人： Atsushi Hironaka ,  Motoo Ikari ,  Yuji Takada ,  Hiroshi Matsuda ,  Yorinobu Murayama

发明人： Atsushi Hironaka ,  Motoo Ikari ,  Yuji Takada ,  Hiroshi Matsuda ,  Yorinobu Murayama

IPC分类号： H01J440

CPC分类号： G08B13/191 ,  G01J5/34

摘要： An object detecting device utilizes a pyroelectric sensor providing a sensing current, a voltage amplifier providing an amplified voltage proportional to the sensing current, and a level monitor providing a detection signal when the amplified voltage exceeds a detection threshold. The device has a standby mode where the voltage amplifier receives a limited source current to provide the voltage of low amplification, and the level monitor provides a wake-up signal when the low amplified voltage exceeds a preliminary threshold lower than the detection threshold. In response to the wake-up signal, the device is switched to an operation mode where the amplifier receives a rated source current to provide a voltage of high amplification for comparison with the detection threshold. Thus, the amplifier is kept to be less-power consuming in the absence of the wake-up signal, reducing a power requirement.

摘要翻译： 物体检测装置利用提供感测电流的热电传感器，提供与感测电流成比例的放大电压的电压放大器，以及当放大电压超过检测阈值时提供检测信号的电平监视器。 器件具有待机模式，其中电压放大器接收有限的源电流以提供低放大的电压，并且当低放大电压超过低于检测阈值的初步阈值时，电平监视器提供唤醒信号。 响应于唤醒信号，器件切换到操作模式，其中放大器接收额定源电流以提供与检测阈值相比较的高放大电压。 因此，在没有唤醒信号的情况下，放大器保持功耗较低，从而降低了功率需求。

公开(公告)号：US5287047A

公开(公告)日：1994-02-15

申请号：US847275

申请日：1992-03-10

申请人： Yorinobu Murayama ,  Kenji Otani

发明人： Yorinobu Murayama ,  Kenji Otani

IPC分类号： H01L27/082 ,  H02P3/08 ,  H02P3/12 ,  H01L25/00

CPC分类号： H02P3/12 ,  H01L27/0821 ,  H02P3/08

摘要： A motor drive circuit, in which a first transistor at a drive stage, a second transistor at an output stage to be driven by the first transistor and a third transistor downstream the output stage for a short braking operation are formed in a common substrate or a common well of the substrate, a region of either a P type or an N type in either the substrate or the well is connected with the first transistor via a conductor so that a parasitic transistor is formed in which the substrate or the well serves as its base, whereby a current flowing from the first transistor to the second transistor during the short braking operation is sinked by turning on the parasitic transistor.

摘要翻译： 一种电动机驱动电路，其中驱动级的第一晶体管，在第一晶体管驱动的输出级的第二晶体管和用于短时制动操作的输出级下游的第三晶体管形成在公共衬底或 衬底或衬底或阱中的P型或N型区域经由导体与第一晶体管连接，从而形成寄生晶体管，其中衬底或阱用作衬底或阱 从而通过接通寄生晶体管而在短时间制动操作期间从第一晶体管流向第二晶体管的电流被吸收。

公开(公告)号：US4942347A

公开(公告)日：1990-07-17

申请号：US437225

申请日：1989-11-16

申请人： Kenji Ohtani ,  Yorinobu Murayama

发明人： Kenji Ohtani ,  Yorinobu Murayama

IPC分类号： G05F1/56 ,  H02P23/00

CPC分类号： G05F1/561 ,  H02P23/186

摘要： There is disclosed a motor drive circuit, into which an output circuit for supplying a drive output to a motor is incorporated, having a temperature compensating circuit or an output current regulating circuit added to a transistor, interposed between a servo IC for generating a servo signal and the output circuit, for supplying the output circuit with a drive current corresponding to the control output. A dependency on the temperature is obviated by arbitrarily setting an operating point of the output current and compensating temperature characteristics, and the motor is thereby protected from an excessive current.

摘要翻译： 公开了一种电动机驱动电路，其中并入有用于向电动机提供驱动输出的输出电路，具有添加到晶体管的温度补偿电路或输出电流调节电路，插入在用于产生伺服信号的伺服IC之间 以及输出电路，用于向输出电路提供与控制输出相对应的驱动电流。 通过任意设定输出电流的工作点和补偿温度特性来消除对温度的依赖性，从而保护电动机不受过电流的影响。