Abstract: A current biasing circuit is provided, which is designed to suppress reference current drift caused by temperature variation with a low overall temperature coefficient of a constant-voltage circuit and at least one resistor. The constant-voltage circuit comprises a diode and/or a diode-connected transistor. This current biasing circuit is based on a current mirror architecture, is easy to implement, and is a relatively temperature-independent current source.

Abstract: An improved bar code symbol reading methodology/device/system includes a bar code symbol reading engine that reads bar code symbols affixed to objects proximate thereto and 3roduces symbol character data representative of such bar code symbols. A data transmission subsystem, operably coupled to the bar code reading engine, communicates such symbol character data to the communication interface of a host system over a communication link there between. The data transmission subsystem implements a plurality of different communication interfaces.

Abstract: An ultrasound system comprises a front-end and a back-end. The front-end acquires ultrasound data indicative of a subject and comprises a probe, transmitter, receiver and beamformer. The probe has a plurality of transducer elements which are driven by the transmitter to transmit ultrasonic signals into the subject. The receiver detects returned echoes based on the ultrasonic signals, and the beamformer receives the returned echoes from the receiver and outputs a beamformed signal. The back-end comprises a single integrated circuit (IC). The back-end receives the beamformed signal from the front-end. The back-end processes the beamformed signal and outputs ultrasound image data based on the beamformed signal.

Abstract: The wireless PDT of the present invention employs a “display-on bottom” design which places the unit perfectly centered in the hand of the operator, allowing for the best possible viewing as well as providing comfortable single-handed operation. The high-resolution LCD display allows the PCT to show sharp, clear bitmap images while supporting all Windows-recognized font types and sizes. With the auto back-lit feature, the brightness adjusts automatically making the screen easy to read in all light conditions. The PDT is designed for support within the download/charger cradle of a base station which interfaces with a host system using either USB or RS232 interface. Two standard ‘AA’ or rechargeable Li-Ion batteries provide more than 100 hours of operation. In addition, the PDT comes standard with 2MB of RAM providing enough memory to store over 100,000 records.

Abstract: An improved bar code symbol reading methodology/device/system includes a bar code symbol reading engine that reads bar code symbols affixed to objects proximate thereto and produces symbol character data representative of such bar code symbols. A data transmission subsystem, operably coupled to the bar code reading engine, communicates such symbol character data to the communication interface of a host system over a communication link therebetween. The data transmission subsystem implements a plurality of different communication interfaces.

Abstract: A method of developing an application program for running on a wireless portable data terminal (PDT), comprising the steps of (a) during the development of an application program for running on a wireless PDT supported by a first operating system, generating user input and documents using development programs running on a developer computer system supported by a second operating system; (b) developing the application program on the developer computer system into a final application program expressed in the form of binary executable code designed for execution on the first operating system loaded onto the wireless PDT; (c) downloading the binary executable code of the final application program onto the wireless PDT; and (d) running the final application program in binary executable code upon the first operating system loaded onto the wireless PDT.

Abstract: A data transmission subsystem, operably coupled to the bar code reading engine, communicates such symbol character data to the communication interface of a host system over a communication link therebetween. The data transmission subsystem implements a plurality of different communication interfaces. During an interface configuration mode of operation, the data transmission subsystem is able to automatically configure itself such that its interface is suitable for communication to the communication interface of the host system. Moreover, the device is thus capable of interfacing to a variety of different host devices in an automatic and error free manner with minimal human involvement, thus providing significant advantages over the prior art bar code symbol reading devices.

Abstract: The wireless PDT of the present invention employs a “display-on bottom” design which places the unit perfectly centered in the hand of the operator, allowing for the best possible viewing as well as providing comfortable single-handed operation. The high-resolution LCD display allows the PCT to show sharp, clear bitmap images while supporting all Windows-recognized font types and sizes. With the auto back-lit feature, the brightness adjusts automatically making the screen easy to read in all light conditions. The PDT is designed for support within the download/charger cradle of a base station which interfaces with a host system using either USB or RS232 interface. Two standard ‘AA’ or rechargeable Li-Ion batteries provide more than 100 hours of operation. In addition, the PDT comes standard with 2 MB of RAM providing enough memory to store over 100,000 records.

Abstract: A data transmission subsystem, operably coupled to the bar code reading engine, communicates such symbol character data to the communication interface of a host system over a communication link therebetween. The data transmission subsystem implements a plurality of different communication interfaces. During an interface configuration mode of operation, the data transmission subsystem is able to automatically configure itself such that its interface is suitable for communication to the communication interface of the host system. Moreover, the device is thus capable of interfacing to a variety of different host devices in an automatic and error free manner with minimal human involvement, thus providing significant advantages over the prior art bar code symbol reading devices.

Abstract: A wireless PDT of the present invention employing a “display-on bottom” design which places the unit perfectly centered in the hand of the operator, allowing for the best possible viewing as well as providing comfortable single-handed operation. The high-resolution LCD display allows the PCT to show sharp, clear bitmap images while supporting all Windows-recognized font types and sizes. With the auto back-lit feature, the brightness adjusts automatically making the screen easy to read in all light conditions. The PDT is designed for support within the download/charger cradle of a base station which interfaces with a host system using either USB or RS232 interface. Two standard ‘AA’ or rechargeable Li-Ion batteries provide more than 100 hours of operation. In addition, the PDT comes standard with 2 MB of RAM providing enough memory to store over 100,000 records.

Abstract: The wireless PDT of the present invention employs a “display-on bottom” design which places the unit perfectly centered in the hand of the operator, allowing for the best possible viewing as well as providing comfortable single-handed operation. The high-resolution LCD display allows the PCT to show sharp, clear bitmap images while supporting all Windows-recognized font types and sizes. With the auto back-lit feature, the brightness adjusts automatically making the screen easy to read in all light conditions. The PDT is designed for support within the download/charger cradle of a base station which interfaces with a host system using either USB or RS232 interface. Two standard ‘AA’ or rechargeable Li-Ion batteries provide more than 100 hours of operation. In addition, the PDT comes standard with 2MB of RAM providing enough memory to store over 100,000 records.

Abstract: An improved bar code symbol reading device includes a data transmission subsystem, operably coupled to a bar code reading engine, that communicates symbol character data to the communication interface of a host system over a communication link therebetween. During an interface configuration mode, the data transmission subsystem automatically cycles though at least one of a plurality of different communication interfaces (implemented by the subsystem) to test if the given communication interface corresponds to the communication interface of the host system. If this test is successful, subsequent data communication between the bar code symbol reading device and the host system is enabled over the active communication interface. In this manner, the data transmission subsystem is able to automatically configure itself for communication to the host system, and is capable of interfacing to a variety of different host devices in an automatic and error free manner with minimal human involvement.

Abstract: An improved bar code symbol reading device includes a data transmission subsystem, operably coupled to a bar code reading engine, that communicates symbol character data to the communication interface of a host system over a communication link therebetween. During an interface configuration mode, the data transmission subsystem automatically cycles though at least one of a plurality of different communication interfaces (implemented by the subsystem) to test if the given communication interface corresponds to the communication interface of the host system. If this test is successful, subsequent data communication between the bar code symbol reading device and the host system is enabled over the active communication interface. In this manner, the data transmission subsystem is able to automatically configure itself for communication to the host system, and is capable of interfacing to a variety of different host devices in an automatic and error free manner with minimal human involvement.