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"Transmission of documents via telephone wires is possible in principle, but the apparatus required is so expensive that it will never become a practical proposition."
Dennis Gabor, British physicist
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| Number | Title | Issue Date |
| D535952 | Touch and hold connector strip for an electronic token | 01/30/2007 |
| 6996725 | Encryption-based security protection for processors Methods, systems, and arrangements enable increased security for a processor, including by implementing block encryption. The block may include multiple instructions and/or operations to be executed by the processor. The block may also include multiple bytes that ar... | 02/07/2006 |
| 6986057 | Security device and method A security device is disclosed. In one embodiment, the security device includes a memory device comprising having a first memory portion configured to store a device ID; and a second memory portion configured to store a device secret. The security device further inc... | 01/10/2006 |
| 6969970 | Method of controlling the charging of a battery A battery charger with charging parameter values derived from communication with a battery pack to be charged. Communication is over a one-wire bus with battery pack transmissions in response to charger inquiries. The battery charger may be in the form an integrated... | 11/29/2005 |
| 6868505 | Memory exchange Methods, systems, and arrangements enable efficient reprogramming of a memory block of a microcontroller. Two blocks of memory each have a different logical location with respect to a processor of the microcontroller. The first memory may store vector information to... | 03/15/2005 |
| 6745301 | Microcontroller programmable method for accessing external memory in a page mode operation A microcontroller and method for executing instructions from an 8051 instruction set are disclosed. The microcontroller includes first and second input/output (I/O) ports that are controlled such that the first I/O port is a dedicated data port and the second I/O po... | 06/01/2004 |
| 6691219 | Method and apparatus for 24-bit memory addressing in microcontrollers The present invention provides an 8-bit microcontroller capable of supporting expanded addressing capability in one of three address modes. The microcontroller operates in either the traditional 16-bit address mode, a 24-bit paged address mode or in a 24-... | 02/10/2004 |
| 6587807 | Environmental condition sensor device and method A device and method for measuring temperature is disclosed. The device, for example, can include a thermocouple configured to generate a voltage indicative of a junction temperature; a memory device configured to store a unique device ID and to store data... | 07/01/2003 |
| 6476682 | Method for calibrating a temperature sensitive oscillator A temperature compensated crystal oscillation circuit adapted to be contained within a small device package and providing an output frequency accuracy of approximately +/-2 ppm over a temperature range or less than 2 minutes per year over the temperature ... | 11/05/2002 |
| 6476716 | Temperature-controlled variable resistor A device and method to regulate an electronic device in response to temperature changes is shown and described. For example, the present invention can control devices that are operable in different operational modes. The method and the device can be used ... | 11/05/2002 |
| 6438502 | Environmental condition sensor device and method A device and method for measuring temperature is disclosed. The device, for example, can include a thermocouple configured to generate a voltage indicative of a junction temperature; a memory device configured to store a unique device ID and to store data... | 08/20/2002 |
| 6414559 | Single package temperature compensated electronic device A temperature compensated crystal oscillation circuit adapted to be contained within a small device package and providing an output frequency accuracy of approximately +/-2 ppm over a temperature range or less than 2 minutes per year over the temperature ... | 07/02/2002 |
| 6412072 | Parasitically powered microprocessor capable of transmitting data over a single data line and ground An electronic module having at least a microprocessor and co-processor on a single integrated circuit. The electronic module can be contained in a small housing. The electronic module provides secure bidirectional data communication via a data bus. The el... | 06/25/2002 |
| 6367024 | Low power power-on reset circuitry having dual states An initializer that responds to change in a power supply potential level, for generating an initialize signal to initialize a circuit to a select state, the initializer includes a power-on reset circuit that switches between an active and a powered-down s... | 04/02/2002 |
| 6351099 | Battery monitoring system with integrated battery holder An apparatus for monitoring the condition of a battery. The apparatus includes a battery clip that is used to secure a battery to a battery connection and a battery monitoring IC. The battery monitoring IC takes a "load vs. no-load measurement" and the re... | 02/26/2002 |
| 6330977 | Electronic labeling systems and methods and electronic card systems and methods Coin-shaped one-wire communication modules with a flange for mounting convenience may be attached to contact extensions on items such as work totes for ease of communication. A host computer can keep track and locate multiple items which have mounted comm... | 12/18/2001 |
| 6330668 | Integrated circuit having hardware circuitry to prevent electrical or thermal stressing of the silicon circuitry An integrated circuit, such as a microprocessor, which incorporates hardware mechanisms to prevent the circuitry from operating outside the proper bounds of design. The hardware circuitry prevents the microprocessor circuitry from being forced to operate ... | 12/11/2001 |
| 6320451 | Static power digital potentiometer An improved method and system for providing power to digital potentiometers is provided by applying the static electric field of an adjacent modified, non-volatile memory cell to the wiper mechanism. During periods of power removal to the circuitry as a w... | 11/20/2001 |
| 6306718 | Method of making polysilicon resistor having adjustable temperature coefficients A polysilicon resistor is formed using a late implant process. Low dopant concentrations on the order of 6×1019 to 3.75×1020 have shown good results. with a reduced post anneal temperature. Both the first and second order temperatu... | 10/23/2001 |
| 6259232 | Battery pack A rechargeable battery pack with low powered, gas gauge circuitry for monitoring and accumulating various operating parameters of the rechargeable battery pack, includes a current monitor for measuring the current flow into and out of a battery cell in th... | 07/10/2001 |
| 6249488 | System and method for keeping time A low power timekeeping system utilizes a state machine to first read seconds stored in a RAM and update seconds and then determine if the minutes requires updating. If the minutes do not require updating then the sequencer stops operation until the next ... | 06/19/2001 |
| 6239732 | One-wire device with A-to-D converter A low power integrated circuit having analog to digital conversion circuitry capable of receiving a plurality of analog signals and converting them to a digital value. The digital value is then transmitted, upon request, over a single wire bus. The accura... | 05/29/2001 |
| 6237095 | Apparatus for transfer of secure information between a data carrying module and an electronic device The present invention relates to an electronic module used for secure transactions. More specifically, the electronic module is capable of passing encrypted information back and forth between a service provider's equipment via a secure, encrypted techniqu... | 05/22/2001 |
| 6219797 | Microcontroller with selectable oscillator source An 8051 microprocessor core having an ability to operate via an external crystal oscillator or be switched to operate in a low power mode via an internal ring oscillator.... | 04/17/2001 |
| 6219789 | Microprocessor with coprocessing capabilities for secure transactions and quick clearing capabilities An electronic module having at least a microprocessor and co-processor on a single integrated circuit. The electronic module can be contained in a small housing. The electronic module provides secure bidirectional data communication via a data bus. The el... | 04/17/2001 |
| 6218809 | Method for monitoring operating parameters of a rechargeable power supply A method for monitoring various parameters and conditions of a rechargeable battery to accurately determine the remaining charge level of the rechargeable battery, and includes using a temperature sensor to monitor the temperature of the rechargeable batt... | 04/17/2001 |
| 6217213 | Temperature sensing systems and methods A temperature-controlled counter/clock arrangement is provided where th rate or frequency of the counting is temperature dependent. This allows for a measuring of thermal accumulation and/or history. The temperature sensing is based upon the use of the va... | 04/17/2001 |
| 6215635 | Direct-to-digital temperature sensor A direct-to-digital temperature sensor is formed with a single switched-capacitor integrator, having a digital sequencer control.... | 04/10/2001 |
| 6209791 | Secure storage of monetary equivalent data systems and processes A secure monetary system comprises an electronic module and equipment to access the electronic module. The electronic module comprising a substantially token-shaped module and secure memory circuitry to store monetary information. The secure memory positi... | 04/03/2001 |
| 6208114 | Battery monitoring system with integrated battery holder An apparatus for monitoring the condition of a battery. The apparatus includes a battery clip that is used to secure a battery to a battery connection and a battery monitoring IC. The battery monitoring IC takes a "load vs. no-load measurement" and the re... | 03/27/2001 |
| 6198329 | Auto zero circuitry and associated method A circuit and associated method for determining the offset bias of a comparator by first shorting together the inputs of the comparator to apply the same voltage signal at each of the inputs of the comparator. The voltage signal at one of the inputs is th... | 03/06/2001 |
| 6191955 | Encapsulation and enclosure of electronic modules An electronic module comprises (a) an electrical assembly of electrical components and a cap. The cap surrounds a portion of the electrical assembly of electrical components to form a pocket between a portion of the electrical assembly of electrical compo... | 02/20/2001 |
| 6182235 | Microcontroller with a user configurable pulse width modulator A microcontroller integrated circuit incorporating a user configurable pulse width modulator. The pulse width modulator circuitry is configurable to be a single, for example 32-bit pulse width modulator, or a plurality of pulse width modulators each havin... | 01/30/2001 |
| 6167527 | Clocking system for microcontrollers An improved clocking system for micro controllers is provided. The micro controller has two mechanisms by which the clocking is provided. One clock is provided by an external clock signal which is generally crystal controlled. A second mechanism for provi... | 12/26/2000 |
| 6160458 | Temperature compensated crystal oscillator A temperature compensated crystal oscillation circuit adapted to be contained within a small device package and providing an output frequency accuracy of approximately +/-2 ppm over a temperature range or less than 2 minutes per year over the temperature ... | 12/12/2000 |
| 6145035 | Card cradle system and method A system comprising a card device for effectuating a transaction when presented to a transaction terminal, the card device including a memory and a first energy source, the source for powering the memory for a period of time, and a card cradle carrier for... | 11/07/2000 |
| 6141764 | Method for initializing an electronic device using a dual-state power-on-reset circuit An initializer that responds to change in a power supply potential level, for generating an initialize signal to initialize a circuit to a select state, the initializer includes a power-on reset circuit that switches between an active and a powered-down s... | 10/31/2000 |
| 6137264 | Battery pack A rechargeable battery pack with low powered, gas gauge circuitry for monitoring and accumulating various operating parameters of the rechargeable battery pack, includes a current monitor for measuring the current flow into and out of a battery cell in th... | 10/24/2000 |
| 6118690 | Dual storage cell memory A dual storage cell memory includes an array of dual storage cells, each of the dual storage cells containing a first memory cell and a second memory cell. The first and second memory cells are well known six-transistor static memory cells with the additi... | 09/12/2000 |
| 6115441 | Temperature detector systems and methods A temperature detector comprising temperature sensing circuitry, calibration circuitry, and power regular circuitry. The temperature sensing circuitry has an output that varies with temperature to create a temperature variation. The calibration circuitry ... | 09/05/2000 |
