摘要:
Instrumentation driver apparatus, including a main driver, coupled to receive an alternating input signal and having a main circuit structure, which is adapted to generate, in response to the alternating input signal, a main output signal with alternating voltage. The apparatus includes a mirror driver, coupled to receive a direct voltage input and having a mirror circuit structure located in proximity to the main circuit structure, which is adapted to generate a mirror output signal in response to the direct voltage input, such that a variation in an operating condition of the main driver causes a corresponding variation in the mirror output signal. The apparatus further includes a feedback circuit, coupled to receive the mirror output signal, which provides in response to the mirror output signal a feedback stabilization input to the main driver so as to stabilize the main output signal.
摘要:
An integrated scanner/radio includes a bar code reader and an RF transceiver integrated on a semiconductor substrate. The bar code reader includes a light source, a scanner for directing light from the light source across a bar code symbol, and a detector for detecting the light reflected from the bar code symbol and creating an electrical signal representative of the detected light. The RF transceiver includes an antenna for transmitting and receiving modulated RF carrier signals.
摘要:
A miniature light beam scanner includes a moving optical element formed on a substrate with electrodes for driving the optical element and sensing its motion as indicated by a varying capacitance between the optical element and the substrate. Control and driver circuitry responsive to the variation in capacitance drives the optical element to move at a resonant frequency and predetermined amplitude.
摘要:
Optical scanning of one and two-dimensional barcode symbols is carried out using a variety of ergonomic scanner embodiments which can each be used either in a hand-held mode or in a fixed-mode. In certain embodiments, hand-held scanners are described which can if required be easily positioned in a number of desired orientations on a work surface. Other embodiments disclose point-of-sale arrangements incorporating removable barcode scanners that can, where necessary, be removed from the point-of-sale unit and used by the checkout operator to scan a large or bulky item in a "point-and-shoot" mode.
摘要:
A bar code scanner which is responsive to the movement of the scanner to activate its light source. The scanner includes a motor having a moving member which is set in motion when the scanner is displaced from a rest position. The moving member generates a voltage in a coil, which activates the operation of the bar code scanner.
摘要:
A communications system according to certain embodiments includes a mobile device and a second type of communications system, such as a landline telephone system, that share usage information. The shared information can include call logs of in-coming and out-going calls, missed calls, text messages, address book information, GPS data, internet browsing data, and the like.
摘要:
A communications system according to certain embodiments includes a mobile device and a second type of communications system, such as a landline telephone system, that share usage information. The shared information can include call logs of in-coming and out-going calls, missed calls, text messages, address book information, GPS data, internet browsing data, and the like.
摘要:
According to certain aspects, a system for controlling use of firearms can include a circuitry coupled to a firearm and in communication with a Global Positioning System (GPS) unit. The circuitry may be configured to: determine, using the GPS unit, coordinates of a current location of the firearm; transmit the coordinates of the current location of the firearm to a remote server, wherein the remote server comprises a database including a plurality of coordinates associated with a plurality of locations at which the firearm should be enabled or disabled; receive from the remote server information relating to whether the firearm should be disabled at the coordinates of the current location of the firearm; and in response to determining that the firearm should be disabled based on the information from the remote server, initiate disabling of the firearm.
摘要:
A voltage conversion circuit such as a buck regulator circuit has a plurality of switches coupled to a voltage source; a slab inductor having a length, a width and a thickness, where the slab inductor is coupled between the plurality of switches and a load and carries a load current during operation of the plurality of switches. The voltage conversion circuit can also include means to reduce or cancel a detrimental effect of other wires on same chip, such as a power grid, that conduct a return current and thereby degrading the functionality of this slab inductor. In one embodiment the wires can be moved further away from the slab inductor and in another embodiment magnetic materials can be used to shield the slab inductor from at least one such interfering conductor.
摘要:
A multi-stage amplifier is provided that uses tunable transmission lines, as well as a calibration method for the multi-stage amplifiers. A multi-stage amplifier, comprises a plurality of tunable amplification stages, wherein each of the tunable amplification stages comprises a tunable resonator based on a transmission line having a tunable element. The tunable elements may vary a capacitance or an inductance to tune a frequency of an applied signal. A calibration method is provided for a multi-stage amplifier having a plurality of transmission lines, an input stage and an output stage. The multi-stage amplifier is calibrated by generating a signal to determine a frequency for a substantially maximum power; generating an error signal by comparing the frequency for the substantially maximum power with a desired frequency; varying a digital control code applied to each of the tunable transmission lines, input stage and output stage until the error signal satisfies predefined criteria.