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公开(公告)号：US5041794A
公开(公告)日：1991-08-20
申请号：US616436
申请日：1990-11-21
IPC分类号： H03F3/34 , H03F1/30 , H03K17/041 , H03K17/66 , H03K17/687 , H03M1/12 , H03M1/52
CPC分类号： H03K17/04106 , H03F1/30 , H03F1/303 , H03K17/667 , H03K17/6872
摘要： A voltage to current conversion switching system includes an input terminal for receiving input signal voltage to be converted to a current; an output terminal; a first, positive channel having a first offset amplifier for introducing a positive offset to the input signal; a first voltage to current amplifier responsive to the first offset amplifier; and first switching means responsive to the first voltage to current amplifier to provide a first offset current signal to the output terminal; a second, negative channel has a second offset amplifier for introducing a negative offset to the input signal; a second voltage to current amplifier responsive to the second offset amplifier; and second switching means responsive to the second voltage to current amplifier to provide a second equal and opposite offset current signal to the output terminal to compensate for the temperature drift and switching current injection in the first and second offset current signals; and drive means for actuating the first and second switch means simultaneously to open and close and periodically combine the first and second offset current signals to produce an output current compensated for temperature drift and switching current injection.
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2.发明授权
公开(公告)号：US4484111A
公开(公告)日：1984-11-20
申请号：US415979
申请日：1982-09-08
CPC分类号： G01R13/22 , H03F3/3071
摘要： The signal amplifier is used for amplification of an input signal with varying control amplitude, particularly in the field of electromedicine. The amplifier contains at least two amplification paths which supply current to the deflection coil of the recording device. In the first path is arranged a first individual amplifier which is designed as a voltage-controlled current source. It is rated for a lower control range. This lower range is chosen to be the range in which the input signal lies during relatively long periods of time. In the second path is arranged a second individual amplifier. This amplifier is designed as a voltage amplifier. It is rated for a higher control range and supplies the deflection coil with peak current during relatively short periods of time.
摘要翻译： 信号放大器用于放大具有变化的控制振幅的输入信号，特别是在电子医学领域。 放大器包含至少两个向记录装置的偏转线圈提供电流的放大路径。 在第一路径中布置有被设计为电压控制电流源的第一单独放大器。 它的控制范围较低。 该较低范围被选择为输入信号在较长时间段内所处的范围。 在第二路径中布置有第二个单独的放大器。 该放大器设计为电压放大器。 额定值为更高的控制范围，并在较短的时间内为偏转线圈提供峰值电流。
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3.发明授权Method and apparatus for generating three coordinate signals x, y, z for an x, y, z display device 失效用于生成x，y，z显示装置的三坐标信号x，y，z的方法和装置
公开(公告)号：US4426644A
公开(公告)日：1984-01-17
申请号：US186539
申请日：1980-09-12
CPC分类号： G01R13/20 , G01R13/206 , G01R13/22
摘要： A composite signal is transmitted via a transmission line to an x, y, z display device. The composite signal contains in each of a plurality of predetermined time intervals an identifiable signal. The first signal of said composite signal is a synchronizing start signal. The other signals contain varying information. In the display device there are generated an x-, a y- and a z-coordinate signal. These coordinate signals are generated such that in said predetermined time intervals with reference to the synchronizing start signal and in predetermined varying combinations two of these three coordinate signals are developed and determined by the display device, whereas the remaining third coordinate signal is developed by the display device, but is determined from one of the other signals of the composite signal received via the transmission line.
摘要翻译： 复合信号通过传输线传输到x，y，z显示装置。 复合信号在多个预定时间间隔的每一个中包含可识别的信号。 所述复合信号的第一信号是同步开始信号。 其他信号包含不同的信息。 在显示装置中，产生x，y，z坐标信号。 产生这些坐标信号，使得在参考同步开始信号的所述预定时间间隔中，并且在预定的变化组合中，由显示装置显影和确定这三个坐标信号中的两个，而剩下的第三坐标信号由显示器显影 装置，而是经由传输线路接收的复合信号的其它信号之一确定。
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公开(公告)号：US5578949A
公开(公告)日：1996-11-26
申请号：US391404
申请日：1995-02-16
IPC分类号： H02M7/48 , H02M7/5387 , H02M11/00
CPC分类号： H02M7/53871 , H02M7/48
摘要： A single stage voltage to current conversion switching system which includes an input terminal for receiving an input signal voltage to be converted to a current, an output terminal, and a positive channel having a first operational amplifier with a reference input and a summing input. The summing input receives the input voltage signal and introduces a first offset voltage to the input signal voltage. There is a first semiconductor circuit connected to the output of the first operational amplifier to provide a first offset current signal. There are first switching means interconnected with the first semiconductor circuit to deliver the first offset current signal to the output terminal. There is a negative channel having a second operational amplifier with a reference and a summing input that receives the input voltage signal and introduces a second offset signal to the input signal voltage. There is a second semiconductor circuit connected to the output of the second operational amplifier to provide a second offset current signal equal in amplitude and opposite in polarity to the first offset current signal. There are second switching means interconnected with the second semiconductor circuit to deliver the second offset current signal to the output terminal and means for actuating the first and second switching means simultaneously to open and close and periodically combine the first and second offset current signals to form an output current with temperature drift and switching current injection compensation.
摘要翻译： 单级电压到电流转换开关系统，其包括用于接收要转换为电流的输入信号电压的输入端子，输出端子和具有带有参考输入和相加输入的第一运算放大器的正通道。 求和输入接收输入电压信号并向输入信号电压引入第一偏移电压。 连接到第一运算放大器的输出的第一半导体电路提供第一偏移电流信号。 存在与第一半导体电路互连以将第一偏移电流信号传送到输出端的第一开关装置。 存在具有参考的第二运算放大器的负通道和接收输入电压信号并将第二偏移信号引入到输入信号电压的求和输入。 存在连接到第二运算放大器的输出的第二半导体电路，以提供等于第一偏移电流信号的幅度和极性相反的第二偏移电流信号。 存在与第二半导体电路互连以将第二偏移电流信号传递到输出端子的第二开关装置和用于同时致动第一和第二开关装置以打开和闭合的装置，并且周期性地组合第一和第二偏移电流信号以形成 输出电流具有温度漂移和开关电流注入补偿。
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公开(公告)号：US5220203A
公开(公告)日：1993-06-15
申请号：US616437
申请日：1990-11-21
摘要： A variable pulse width precision pulse generator includes a constant current source for producing a number of different constant currents; a charge storage device whose voltage output is proportional to the charge stored; and gating means responsive to an input signal for controlling the time during which the constant current source charges the charge storage device to produce a ramp voltage; a first comparator responsive to the voltage ramp for detecting a first level of the ramp; a second comparator responsive to the voltage ramp for detecting a second level of the ramp; and logic means responsive to the comparators for providing a precision pulse during the presence of the input signal between the occurrence of the detection of the first and second levels of the ramp by the comparators.
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公开(公告)号：US4200109A
公开(公告)日：1980-04-29
申请号：US940405
申请日：1978-09-07
IPC分类号： A61B5/0428 , A61B5/0424 , A61B5/04
CPC分类号： A61B5/0424 , Y10S128/908
摘要： In signal measurement circuits which are referred to a floating ground and which derive their input signals from electrodes attached to a patient's body, the effects of common mode potentials on the patient's body are minimized without requiring any patient electrodes other than those acting as signal sources, by using an operational amplifier to drive the floating ground toward the common mode potential on the patient's body.This process is accomplished without significantly degrading the isolation impedance between the measurement circuits and true ground.The patient is protected from hazardous electrical shock by incorporating a current limiting impedance in the amplifier circuit.
摘要翻译： 在被称为浮动接地并且从其附接到患者身体的电极导出其输入信号的信号测量电路中，使患者身体上的共模电位的影响最小化，而不需要作为信号源的任何患者电极， 通过使用运算放大器将浮动地面驱动到患者身体上的共模电位。 这个过程是完成的，而不会显着降低测量电路和真实接地之间的隔离阻抗。 通过在放大器电路中引入限流阻抗来保护患者免受危险电击。
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