85results about How to "Large signal" patented technology

An information processing device of the invention has an antenna circuit, and a reader/writer device provided with a received signal generating circuit, a microcomputer, a transmitted signal generating circuit, a level detecting circuit, and a D/A converter. The received signal generating circuit is connected to the microcomputer and the antenna circuit, the transmitted signal generating circuit is connected to the microcomputer and the antenna circuit, the D/A converter is connected to the microcomputer and the antenna circuit, the level detecting circuit is connected to the microcomputer and the antenna circuit, and the antenna circuit has an antenna, a resonant capacitor, and a variable capacitor.

A biological sensor which includes: a porous semiconductor structure comprising a central layer interposed between upper and lower layers, each of the upper and lower layers including strata of alternating porosity; and one or more probes coupled to the porous semiconductor structure, the one or more probes binding to a target molecule, whereby a detectable change occurs in a refractive index of the biological sensor upon binding of the one or more probes to the target molecule. Methods of making the biological sensor and methods of using the same are disclosed, as is a detection device which includes such a biological sensor.

A nanopore sensor is provided, including a nanopore disposed in a support structure. A fluidic passage is disposed between a first fluidic reservoir and the nanopore to fluidically connect the first fluidic reservoir to the nanopore through the fluidic passage. The fluidic passage has a passage length that is greater than the passage width. A second fluidic reservoir is fluidically connected to the nanopore, with the nanopore providing fluidic communication between the fluidic passage the second reservoir. Electrodes are connected to impose an electrical potential difference across the nanopore. At least one electrical transduction element is disposed in the nanopore sensor with a connection to measure the electrical potential that is local to the fluidic passage.

The invention provides a switching power supply device which can detect a light load state on a pulse-by-pulse basis without worsening power efficiency. In a synchronous control circuit, for each timing of the turning-on of main switching elements, the delay time Tdif of the conduction timing of internal diodes Ds determined according to the magnitude of the load LD is detected by a comparator, a reference time pulse Tsrs having a prescribed time width is generated by a load judgment circuit, and the logical product of the two is generated by an AND circuit. By this means, the load is regarded as being a light load when the delay time Tdif is longer than the reference time pulse Tsrs, and the synchronous rectification MOSFETs Qs are not turned on.

A calibration unit and technique for calibrating A/D systems (e.g., data acquisition devices) using a pulse-width modulation (PWM) circuit to reduce nonlinearity. The calibration unit may be coupled to an analog-to-digital module (ADM) of the A/D system. The PWM circuit may generate a calibration signal with intentional ripple, which may exercise a region of a transfer curve of the ADM to reduce local nonlinearities in measurements associated with the calibration of the system. Pulse trains of varying frequency and duty cycle may be generated to sweep the PWM circuit through an ADM range and to calculate an ADM linearity correction function, which may be used to perform gain and offset correction with respect to a best-fit line through an ADM transfer curve to reduce large signal nonlinearities. The PWM circuit may include a resistor divider circuit including a plurality of taps to improve the ability to calibrate small input ranges.

A touch panel is partitioned into a sensing region and a circuit region and the circuit region is positioned around the edges of the sensing region. The touch panel comprises an electrode layer, a first wire layer, a second wire layer and an insulating layer. The electrode layer is disposed in the sensing region. The first wire layer is disposed in the circuit region and electrically connects to the electrode layer. The second wire layer electrically connects to the first wire layer in the circuit region. The insulating layer has a portion being disposed between the first wire layer and the second wire layer in the circuit, and has a plurality of first through holes wherein the first wire layer electrically connects to the second wire layer through the first through holes. The present disclosure also provides a method of manufacturing a touch panel.

Noise compensation in controlled source electromagnetics (CSEM) comprises measuring time-varying magnetic gradients of the marine environment subjected to CSEM. From the measured magnetic gradients, oceanographic electric and magnetic field noise is determined and used for noise compensation of CSEM measurements of electric and magnetic fields. Selection of magnetic gradient measurement provides improved measurement of oceanographic magnetic noise as other electromagnetic noise sources produce negligible magnetic gradients in the marine environment. Electric field noise is then predicted from the magnetic measurements.

A modulating gas burner control system using closed loop feedback from a flame rod which provides a signal that varies with gas pressure and which provides combustion air fan control to accurately control the heat from the system without use of expensive control valves.

A bearing assembly with a rotation sensor, comprising an outer member (1), an inner member (2), a plurality of rolling elements (3) interposed between the opposed raceway surfaces, and a rotation sensor (4). The rotation sensor (4) includes an annular magnetic encoder (15) and an annular magnetic sensor (16) fitted to the outer member (1) through a sensor cap (12) and a sensor connector (22). The sensor cap (12) is formed in a cylindrical shape having a bottom shape, and has an opening end fitted to an inner periphery or outer periphery of the outer member (1) The sensor connector (22) is formed integrally with the magnetic sensor (16), formed in a polygonal shape on its outer periphery, and fitted to the inner periphery of the sensor cap (12) by a press-fitting.

Electronic switch (1) with two switching states (ON, OFF) possesses at least one field effect switching transistor (Q1), input port (In) connected with source terminal (S), on which input signal (Vin) is present, output port (Out) connected with drain terminal, on which switched signal (Vout) is present, control port (Con) connected to gate terminal (G), on which is present signal (Vc) for controlling electronic switch (1) and switch apparatus (Sw), which creates the two switching states (ON, OFF) by means of a changing of control signal (Vc). Controlling signal (Vc), during at least one of the two switching states (ON, OFF) is, at least partially, formed by correction signal (Sc), which in turn is produced from input signal (Vin), so that the frequency dependent drop in voltage between the drain-source channel and the gate electrode of the field effect switching transistor (Q1) is at least partially compensated.

A method for calibrating the scan amplitude of an electron beam lithography instrument by determining the position of a feature within the scan. The method is effective at the operating frequency of the scan and using a limited bandwidth video signal including the steps of determining the reference feature to be an edge over which the video signal rises abruptly from a background level to a white level. The method turns the beam on only over a short region of the scan and represents the degree of overlap between the beam on portion of the scan and the white part of the feature as the total video signal accumulated in that scan.

A technique for reducing multipath distortion in an FM receiver, with a plurality of switchable antennas, provides a fast distortion detector that monitors a received signal for significant distortion events of less than about 15 microseconds in duration. In response to a multipath event, the output of the fast distortion detector initiates a search for a lower distortion (better quality) antenna. To prevent frequent antenna searches from causing an audible disturbance, a threshold is introduced to desensitize the fast distortion detector. Threshold decay is a function of an overall received RF signal level. A slow distortion detector is also provided that measures distortions of the received signal relating to signal quality.

The invention concerns a gas analyzer comprising: a measuring volume (2), a radiation source (1) for providing a beam to pass said measuring volume; a heat sink (16) for said radiation source; at least one thermal detector (3) having a hot junction within a support structure and receiving the radiation and a cold junction for reference within the same support structure and protected from said radiation; at least one optical bandpass filter (9) between said hot junction and said radiation source; and a thermal mass (11), which is formed of a material having high thermal conductance. The thermal mass has a cavity with a bottom step (34) and a rim (32), and a first length therebetween. The support structure has a frontal edge (35) and a base plate lip (33), and a second length therebetween. There is a radial gap between the thermal mass and the support structure. Press means urge said support structure in the cavity, whereupon a more efficient thermal contact is either between said frontal edge and said bottom step, or between said base plate lip and said rim. A first thermal barrier (17) is between the heat sink and the thermal mass, and a second thermal barrier (22) surrounds the thermal mass. A shield (19) formed of a material having high thermal conductance covers said second thermal barrier and is in thermal contact with said heat sink.

A system for current efficient dynamic power range control in a transmitter lineup (10) can include a switched mixer (18) coupled to a switched step attenuator (20) and a switched power driver (22) coupled to the switched step attenuator. Linearity and efficiency can be substantially maintained for more than 70 dB of dynamic power range for the system. The dynamic power range control can all occur within the radio frequency range and current can be dynamically switched along with the output power. The transmitter can allow for over 30 dB of continuous power control and over 45 dB of discrete power control. The switched power driver can further include continuous power control via a stacked current steer (202) and stepped power control via a current switched IQ summer amplifier (204, 206, 208, 209, 214, 216, 218, 219) where the steered current switched IQ summer amplifier can provide over 60 dB power control range.

The present invention relates to an electronic ballast for operating a lamp (L) which has a Class E converter (T1, L1). When a lamp (L) is connected, the output current of the Class E converter (T1, L1) once a switching element (T1) of the Class E converter (T1, L1) has been switched off has a first and a second half-cycle of opposite polarity. The electronic ballast has a measurement apparatus for measuring the output current and a regulating apparatus for adjusting a switch-on time of the switching element. In this case, the measurement apparatus is designed to determine a first output current value of the first half-cycle and a second output current value of the second half-cycle, wherein the regulating apparatus for adjusting the switch-on time is fed a control variable based on the discrepancy between the two output current values.

An internal combustion piston engine having gas exchange valves actuated by cams of a camshaft. The cams are sliding cams having two cams per sliding cam unit situated on a basic shaft in rotationally fixed fashion but axially displaceable. At least one actuator unit has two actuator pins for displacing the sliding cam units into different axial positions using displacement grooves on the circumference of the sliding cam units, the grooves being helical and situated mirror-symmetrically, and having an ejection ramp for the actuator pins. The actuator pins are spring-loaded toward the sliding cam unit and, in retracted positions, can be fixed by arresting devices, which have control needles that correspond to clamping bodies of locking devices. These needles are actuatable by an electromagnet unit, with the control needles being connected with a needle bridge. A pin engages the needle bridge, and the pin is controlled by the electromagnet unit.

An apparatus (500, 600) comprising an ultrasound transducer element (300) for generating an ultrasonic beam (302) through a target zone (308, 538). The ultrasonic beam has an ultrasound frequency. The apparatus comprises a magnetic resonance system (502) with a resonant frequency modulator (542, 544, 516) for modulating a magnetic resonance frequency relative to a magnetic resonance of molecules in the target zone at the ultrasound frequency. Instructions cause a processor to repeatedly generate (100, 204) first gradient commands (562) which cause a magnetic field gradient coil to generate a first gradient magnetic field (710, 810) through the target zone. The gradient magnetic field has field lines directed in a first direction (304). The processor repeatedly modulates (102, 206) the magnetic resonance frequency at the ultrasound frequency, generates (104, 208) ultrasound commands (566), acquires (106, 210) magnetic resonance data from the target zone, and generates (108, 212) second gradient commands (564).

An apparatus on a satellite includes a standard fixed-path Michelson interferometer. The Michelson interferometer includes an input, at least one first output detector, and at least one second output detector. The Michelson interferometer includes a plurality of respective fields of view and a corresponding plurality of scanning azimuthal angles relative to a satellite velocity vector. The plurality of respective fields of view corresponds to a plurality of tangent points with constant tangent point height arranged around an Earth horizon circle. The apparatus includes an attitude determination and control system on the satellite, or an actuator on the satellite. The apparatus includes an input mirror and/or input optics in optical communication with the input of the Michelson interferometer. The attitude determination and control system rotates the satellite or the actuator rotates the input mirror and/or the input optics, so as to sweep through the plurality of respective fields of view around the Earth horizon circle.

A system and method for distributed dynamic strain measurement using optical fiber that is based on Brillouin optical time-domain reflectometry (BOTDR) with stimulated Brillouin scattering (SBS). A short-time Fourier transform (STFT) is used to rebuild the Brillouin frequency shift (BFS) of the SBS scattered signal to perform the dynamic strain measurement.