A method for making a secure ID card (100) with multiple images is provided. Information is provided to an information bearing layer (106) which is disposed beneath an outer laminate layer (102, another laminate layer is 114) having lenticules (116a) through (116n) formed thereon, the information (118a) through (118n) constructed and arranged to be capable of providing multiple images when printed information is viewed at different predetermined angles through an appropriate lens. The first surface (104) can also include other information (another surface is 108).

Multiple image security features for identification documents and methods of making same

An optical mouse images as an array of pixels the spatial features of generally any micro textured or micro detailed work surface below the mouse. The photo detector responses are digitized and stored as a frame into memory. Motion produces successive frames of translated patterns of pixel information, which are compared by autocorrelation to ascertain the direction and amount of movement. A hold feature suspends the production of movement signals to the computer, allowing the mouse to be physically relocated on the work surface without disturbing the position on the screen of the pointer. This may be needed if the operator runs out of room to physically move the mouse further, but the screen pointer still needs to go further. The hold feature may be implemented with an actual button, a separate proximity detector or by detecting the presence of a characteristic condition in the digitized data, such as loss of correlation or velocity in excess of a selected limit. A convenient place for an actual hold button is along the sides of the mouse near the bottom, where the thumb and the opposing ring finger grip the mouse. The gripping force used to lift the mouse engages the hold function. Hold may incorporate a brief delay upon either the release of the hold button, detection of proper proximity or the return of reasonable digitized values. During that delay any illumination control or AGC servo loops stabilize. A new reference frame is taken prior to the resumption of motion detection.

Proximity detector for a seeing eye mouse

A method for delivery of an agent to a cell using electroporation is disclosed. The method includes positioning a first electrode and a second electrode such that an electrical signal passed between the first electrode and the second electrode passes through the cell. The method also includes passing an electrical signal between the first electrode and the second electrode, the electrical signal having a frequency greater than about 10 kHz. In one embodiment of the method, the electrical signal has a bipolar waveform. In another embodiment of the method, the electrodes are positioned at a treatment site, e.g., a tumor, for in vivo delivery of an agent.

Method and apparatus for reducing electroporation-mediated muscle reaction and pain response

"Seeing eye" mouse for a computer system

An imaging system for imaging a fingerprint operates in at least two different modes to provide both finger recognition and finger navigation applications. A light source illuminates a swipe interface having an elongated sensing area upon which a user swipes a finger. Light reflected from the finger is captured by an optical image sensor as image data representing a sequence of images resulting from motion of the digit over the sensing area of the swipe interface. The captured image data is output by the optical image sensor for processing of the data in one of the at least two different modes.

Imaging system and apparatus for combining finger recognition and finger navigation

A scanning mouse has two optical navigation sensors to allow measurement of both translation and rotation of the scanning mouse. It also has an image sensor, and the ability to digitize the sensed image data. There may be a second image sensor at perpendicular to the first. A high speed digital data path connects the scanning mouse to the computer. Software in the computer processes image line data that includes the locations of the navigation sensors and the digitized image data to produce partial scanned images that are further assembled into a complete image within the environment of the computer. Each optical navigation sensor images as an array of pixels the spatial features of generally any micro textured or micro detailed work surface below the mouse. The photo detector responses are digitized and stored as a frame into memory. Motion produces successive frames of translated patterns of pixel information, which are compared by autocorrelation to ascertain the direction and amount of movement. A hold feature suspends the production of movement signals to the computer.

Scanning mouse for a computer system

A single-ended to differential converter uses a cross-coupled latch that maximizes the output zero-crossing symmetry and is self compensating over PVT variations. An in-phase driving signal is provided by an always-on transmission gate coupled to the input. An out-of-phase driving signal is provided by an inverter coupled to the input. The in-phase and out-of-phase driving signals each drive an input of the cross-coupled latch. The in-phase driving signal from the always-on transmission gate starts to bring the cross-coupled latch into conduction, and when the out-of-phase driving signal arrives, the simultaneous driving of the cross-coupled latch causes a rapid and symmetric transition of both outputs of the cross-coupled latch.

Low-skew single-ended to differential converter

A preamplifier circuit for a computer data storage system disk drive read/write head (or HSA) includes multiple test modes to enable electrical testing of the preamplifier, the read/write heads, and associated circuitry without physically probing the components or circuitry. Communication between the preamplifier and a host controller provides for test mode selection and test mode enablement within the preamplifier. Testing occurs using only the normal interface connector to the head disk assembly (HDA) in which the preamplifier and HSA are embodied. Properties such as electrical resistance, ESD, preamplifier bond wire connection integrity, head bond wire and solder joint integrity, and connections from the head slider to the preamplifier leads are all tested. Testing occurs without probing to provide efficient, reliable, and cost effective manufacturing and testing benefits of the read/write heads, flex assembly, HSA, and HDA.

Circuit and method for testing a disk drive head assembly without probing

Disclosed are a circuit and a method for automatically tuning a filter circuit to compensate for variations in process, voltage, and temperature. The filter circuit includes one or more N-bit capacitor arrays. The circuit includes calibration circuitry and tuning circuitry. The calibration circuitry includes a resistor and a capacitor array that has at least N capacitors, which are configured to receive N input data bits. Each of the at least N capacitors is associated with an input data bit. The calibration circuitry is configured to integrate an input voltage signal in response to the input data bits to generate an output signal for tuning each of the capacitors. The tuning circuitry is coupled to provide the input data bits to the calibration circuitry for tuning the capacitor array and is configured to sequentially tune the N capacitors in response to the output signal by determining and setting a data bit value for each of the N capacitors. The tuning circuitry provides the tuned data bit value to the associated capacitor for tuning the other remaining capacitors. When all data bits have been tuned, they are provided to the filter circuit to compensate for variations in process, voltage, and temperature.

Circuit for automatically tuning filter circuits over process, voltage, and temperature

The present invention provides a write driver circuit for use in a magnetic read/write system for writing information to a magnetic storage medium. In accordance with a first embodiment of the present invention, the write driver circuit comprises a variable common mode circuit component for enabling the common mode output voltage of the write driver circuit to be varied and/or set to a preselected value. In accordance with a second embodiment of the present invention, the write driver circuit comprises a variable damping resistance circuit component for enabling the damping resistance of the write driver circuit to be varied and/or set to a preselected value in order to optimize write current rise time and overshoot. The write driver circuit may comprise both the variable common mode circuit component and the variable damping resistance component to enable both the common mode output voltage and the damping resistance to be varied and set to preselected values in order to optimize the performance of the write driver circuit. In accordance with another embodiment of the present invention, a relatively high-power write driver circuit is fabricated using a fabrication process normally used for fabricating relatively low-power write driver circuits. in accordance with this embodiment, the current sources of the write driver circuit are each comprised of a plurality of transistors connected in series in cascode configurations such that the voltage drop across any one of the transistors of the cascode configurations is limited to meet the requirements. of the fabrication process.

Bradley K. Davis

Papers

Scanning mouse for a computer system

Low-skew single-ended to differential converter

Circuit and method for testing a disk drive head assembly without probing

Circuit for automatically tuning filter circuits over process, voltage, and temperature

Programmable write driver circuit for writing information to a magnetic storage media