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1.发明授权Biasing and erasing apparatus and method for magnetic tape recording devices to improve signal-to-noise ratio 失效用于提高信噪比的磁带记录装置的偏置和擦除装置和方法
公开(公告)号：US5321563A
公开(公告)日：1994-06-14
申请号：US898860
申请日：1992-06-15
申请人： Robert Sanford , Robert Cook , Gerald Stuteville
发明人： Robert Sanford , Robert Cook , Gerald Stuteville
摘要： A circuit for generating a bias signal and an erase signal for use in a recording apparatus having a record head for recording an input analog signal on a magnetic tape, and an erase head for erasing information from the tape. A DC erase signal is applied to the erase head in response to the erase control signal to cause the erase head to erase information. An AC bias signal is generated and is combined with the input analog signal to make a record signal. The record signal is applied to the record head in response to the record control signal to record information on the tape. A controller generates an erase control signal and as record control signal. The AC bias signal is generated by an AC bias oscillator, such as a Hartley oscillator to reduce the noise contributed in the recording system. Use of a DC source to drive the erase head reduces the cost of the circuit, while maintaining a significant increase in the signal-to-noise ratio.
摘要翻译： 用于产生偏置信号的电路和用于具有用于在磁带上记录输入模拟信号的记录头的记录装置中使用的擦除信号，以及用于从磁带擦除信息的擦除头。 响应于擦除控制信号将直流擦除信号施加到擦除头，以使擦除头擦除信息。 产生AC偏置信号并与输入的模拟信号组合以产生记录信号。 响应于记录控制信号将记录信号应用于记录头，以便在磁带上记录信息。 控制器产生擦除控制信号和作为记录控制信号。 AC偏置信号由诸如Hartley振荡器的AC偏置振荡器产生，以减少记录系统中贡献的噪声。 使用直流电源来驱动擦除头可以降低电路的成本，同时保持信噪比的显着提高。
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公开(公告)号：US5402468A
公开(公告)日：1995-03-28
申请号：US898858
申请日：1992-06-15
申请人： Robert Sanford , Robert Cook , Gerald Stuteville
发明人： Robert Sanford , Robert Cook , Gerald Stuteville
CPC分类号： H04M1/65
摘要： The invention comprises a telephone answering device in which a microprocessor controller is coupled to all of the peripheral components through a single common multi-bit data/instruction bus and each peripheral component is coupled to the data bus through a latch which is enabled responsive to an enable instruction placed on a port of the controller.
摘要翻译： 本发明包括电话应答设备，其中微处理器控制器通过单个公共多位数据/指令总线耦合到所有外围组件，并且每个外围组件通过锁存器耦合到数据总线，该锁存器响应于一个 使能控制器端口上的指令。
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公开(公告)号：US5944018A
公开(公告)日：1999-08-31
申请号：US954700
申请日：1997-10-20
CPC分类号： A61H31/005 , A61H31/00 , A61H31/007 , G09B23/288 , A61H2201/5007 , A61H2201/5048 , A61H2201/5058
摘要： A pacing apparatus has a housing formed of laminar material less than about 1" in thickness. Visual indicia are applied to the housing and provide instructions for the administration of the rescue procedure. A pacing signal generator is carried by the housing for providing the pacing signal to a user. The pacing signal generator provides visual and/or audible indications to a user for pacing the administration of the rescue procedure. The usual indicators may be LEDs and the audible indicator may be one or more tones.
摘要翻译： 起搏器具有由小于约1“厚度的层状材料形成的壳体。 视觉标记适用于住房，并提供管理救援程序的指示。 起搏信号发生器由壳体承载，用于向使用者提供起搏信号。 起搏信号发生器为用户提供视觉和/或听觉指示，用于起搏救援过程的管理。 通常的指示器可以是LED，并且可听指示器可以是一个或多个音调。
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