Plotter Servo Electronics Contained on a Single IC

The new X-Y plotter technology described in the accompanying article allows the designer to reduce the complexity and cost associated with the servo control electronics of an electromechanical device Hewlett-Packard Laboratories built numerous prototypes that established the relationship between the digital control circuitry and the mechanism. To achieve me objectives of low cost, small size, low power consumption and high reliability, all of the required digital servo control electronics...

Digital Control Simplifies XY Plotter Electronics

The dominant tneme ot The new ow-mass ow- nertia X-Y plotter Technology is simplicity. This concept is not only prevalent in the mechanism but is the basis of The electronic architecture Fig 1 - The job of the siectronics is to accept a series ot vector and per lift commands from an external source such as a calculator, computer, or another microprocessor, and then to convert these commands intothe appropriate movements of the pen and paper The first stage of this process Takes place in a...

An Incremental Optical Shaft Encoder Kit with Integrated Optoelectronics

This kit can be assembled easily by an OEM original equipment manufacturer to provide accurate digital information about shaft position and velocity in digitally controlled electromechanical systems. by Howard C. Epstein, Mark G. Leonard, and John J. Uebbing HERE IS AN INCREASING DEMAND for digital control of mechanical motion. Incremental shaft encoders allow closed-loop control by sensing the rotational position of the system. A controller compares the actual and desired shaft positions and...

What Is an Electrocardiogram

Steve Scampini

An electrocardiogram ECG is a test used widely to assess the condition of the heart noninvasively. The ECG is used to evaluate the status ot the heart's conduction system, the status of the muscle and. indirectly, the condition of the heart as a pump. The ECG is a graphical presentation of the pioe ectrical activity voltage of the heart muscle and an ECG machine electrocardiograph is a recording voltmeter The heart Fig. 1 has tour chambers called the right and left atria and ventricles. The...

A new vector plotter technology makes possible small inexpensive graphics products that provide highquality plots

Baron, Lawrence LaBarre, Charles E. Tyler, and Robert G. Younge AND ACCOMPANYING ARTICLES in this and next month's issues will trace the evolution of a new S plotting technology from muse to market. This article describes the authors' early thinking and experimentation in Hewlett-Packard's corporate research laboratories, We will also describe our interaction with colleagues in other parts of the company, and how this focused our work, helping us produce the tools they needed to...