62results about How to "Error signal" patented technology

A method and apparatus for the photo-acoustic identification and quantification of one or more analyte species present in a gaseous or liquid medium in low concentration utilizing a laser and a resonant optical cavity containing the medium and having within the cavity at least two partially transparent mirrors, one of which is a cavity coupling mirror and one of which is moveably mounted on an assembly responsive to an input signal.

A fully integrated, programmable mixed-signal radio transceiver comprising a radio frequency integrated circuit (RFIC) which is frequency and protocol agnostic with digital inputs and outputs, the radio transceiver being programmable and configurable for multiple radio frequency bands and standards and being capable of connecting to many networks and service providers. The RFIC includes a tunable resonant circuit that includes a transmission line having an inductance, a plurality of switchable capacitors configured to be switched into and out of the tunable resonant circuit in response to a first control signal, and at least one variable capacitor that can be varied in response to a second control signal, wherein a center resonant frequency of the resonant circuit is electronically tunable responsive to the first and second control signals that control a first capacitance value of the plurality of switchable capacitors and a second capacitance value of the at least one variable capacitor.

A technique to suppress idle tones in any mismatch-shaping encoder for use with a unit-element digital-to-analog converter. The arbitrary mismatch-shaping encoder provides a first set of signals which normally are intended to control directly the unit elements. A scrambler is used to interchange the first set of signals, thereby generating a second set of signals which are used to control the unit elements. The scrambler interchanges the signals as a function of a selector signal. A detecting circuit is used to evaluate in which clock cycles the unit elements have been used equally often. When this occurs, the selector signal is randomly assigned a new value in the following clock cycle.

Multi-user detection method with elimination of interference between users, each user transmitting modulated data in the form of symbols on a transmission channel, each transmission channel (k) comprising at least one propagation path (i) and each propagation path arriving at an array of reception antennae (l) according to a direction of arrival (θi,k), the method comprising at least one sequence of steps for each user (k), each sequence comprising:(a) a reception step (600k,700k,800k,800,900) decomposing each antenna signal into filtered signals (xl,i,k) issuing from the different paths (i) of the said user (k) and combining the said filtered signals by means of a first plurality of coefficients (bl,i,k, ci,k) in order to form an estimation (zk) of the signal transmitted by the user;(b) a step of estimating (670k,770k,870k,870,970) the contribution ((xl,k)l=1 . . . L) of the user to the signals received by the different antennae from the said estimation of the signal transmitted and a second plurality of coefficients (ui,k, wl,i,k ) obtained from the said first plurality of coefficients;(c) a step of eliminating interference (680k′,780k,880k,880,980) subtracting from the antenna signals the contribution estimated at step (b) in order to obtain cleaned antenna signals;the cleaned antenna signals supplied by at least one first sequence being used as antenna signals by at least one second sequence.

A system and method for ocular surgery includes a delivery system for generating and guiding a surgical laser beam to a focal point in a treatment area of an eye. Additionally, a contact device is employed for using the eye to establish a reference datum. Further, an optical detector is coupled to the beam path of the surgical laser to create a sequence of cross-sectional images. Each image visualizes both the reference datum and the focal point. Operationally, a computer then uses these images to position and move the focal point in the treatment area relative to the reference datum for surgery.

A method and apparatus for the photo-acoustic identification and quantification of one or more analyte species present in a gaseous or liquid medium in low concentration utilizing a laser and a resonant optical cavity containing the medium and having within the cavity at least two partially transparent mirrors, one of which is a cavity coupling mirror and one of which is moveably mounted on an assembly responsive to an input signal.

A system for controlling a weld-current in an arc welding apparatus for short arc welding comprising a current regulator included in a voltage feedback loop from a power supply to a welding electrode and a ramp generator arranged to provide current ramps during a short circuit phase at said welding electrode.

A method and apparatus for the photo-acoustic identification and quantification of one or more analyte species present in a gaseous or liquid medium in low concentration utilizing a laser and a resonant optical cavity containing the medium and having within the cavity at least two partially transparent mirrors, one of which is a cavity coupling mirror and one of which is moveably mounted on an assembly responsive to an input signal.

A train control system for controlling trains traveling in a track network including tracks with signals associated therewith. The system includes an on-board track database, a positioning system and an on-board control system. The on-board control system receives position data and automatically brakes the train prior to encountering an upcoming signal based upon specified data points. The train is not automatically braked if certain conditions are met. A method for controlling a train traveling in a track network is also disclosed.

A resolver detected position compensation system for a resolver is provided that can enhance a position detection precision by performing a further compensation on a compensated position that was obtained from a static error compensation. The position detection circuit outputs a compensated detected position signal in which a static error has been compensated. The differential circuit differentiates the compensated detected position signal to obtain a rotational speed of the resolver. Based on a signal representing the rotational speed output from the differential circuit, the phase data memory device and the peak value memory device send the variation in phase and the amplitude peak value, respectively, of the dynamic error signal to the multiplication device. The multiplication device calculates an estimated dynamic error and the subtraction circuit removes the estimated dynamic error from the compensated detected position signal.

The present invention relates to a current-balance circuit and a backlight module having the same. The current balance circuit includes a current balance unit, a control unit, and a detection unit. The current balance unit is connected to a plurality of light units to regulate the current of the plurality of light units, independent from the effects of input voltage. The detection unit is connected to the plurality of light units and the current balance unit to detect the minimum operating voltage for the plurality of light units. The control unit, connected to the current balance unit, controls the operation of the plurality of light units.

A resolver detected position compensation system for a resolver is provided that can enhance a position detection precision by performing a further compensation on a compensated position that was obtained from a static error compensation. The position detection circuit 5 outputs a compensated detected position signal in which a static error has been compensated. The differential circuit 11 differentiates the compensated detected position signal to obtain a rotational speed of the resolver. Based on a signal representing the rotational speed output from the differential circuit 11, the phase data memory means 15 and the peak value memory means 17 send the variation in phase and the amplitude peak value, respectively, of the dynamic error signal to the multiplication means 19. The multiplication means 19 calculates an estimated dynamic error and the subtraction circuit 21 removes the estimated dynamic error from the compensated detected position signal.

A method and apparatus for the photo-acoustic identification and quantification of one or more analyte species present in a gaseous or liquid medium in low concentration utilizing a laser and a resonant optical cavity containing the medium and having within the cavity at least two partially transparent mirrors, one of which is a cavity coupling mirror and one of which is moveably mounted on an assembly responsive to an input signal.

A DC-to-DC converter includes a transformer including a primary transformer coil connected to a power input terminal; a secondary transformer coil connected to a power output terminal; a switching circuit including a first sense circuit that detects a voltage condition of the transformer, the voltage received at the first sense circuit being used to regulate the duty cycle of the switch and to initiate a hiccup mode that dissipates power in the primary and / or secondary windings when the voltage condition detected at the first sense circuit indicates an overload of the transformer; a second sense circuit that detects an over-current condition at the switch and / or primary winding; and a further feedback path connected between the second sense circuit and the first sense circuit that provides a second signal to the first sense circuit to boost the first signal when an overload is detected, and to initiate the hiccup mode.

An optical disk device is capable of preventing a signal from being incorrectly recorded or erased on another data plane different from a data plane in a recording operation on a disk having plural layers of data plane. A focus monitor monitors an increase of a focus error signal. A reflected light quantity monitor may monitor a drop of reflected light quantity. A move from a layer of a data plane during recording may be detected. Depending on these results, a light intensity controller reduces an intensity of a light beam to a reproducing level. The light intensity controller once reduces the intensity to a reproducing level when recording signals in plural layers of data plane. After moving to the layer followed by the focus of the light beam, the intensity of the light beam is raised again to the recording level.

An inductive angle-of-rotation sensor, which is composed of a printed-circuit board, on which an excitation printed conductor and a receiving printed conductor are applied, the receiving printed conductor having a first partial section, which extends in a first plane, and a second partial section, which runs in a second plane. In addition, the inductive angle-of-rotation sensor has a graduation element, which is rotatable in relation to the printed-circuit board and includes a graduation track, which is composed of alternately arranged, electrically conductive and non-conductive graduation regions. The receiving printed conductor supplies an uneven number of signal periods within one rotation relatively to the graduation element. The first partial section of the receiving printed conductor is substantially greater in length than the second partial section. Moreover, a rotary transducer may be equipped with this angle-of-rotation sensor.

A push key for telephones, mobile phones, calculators and computer sets is made of conductive or non-conductive materials. In preferred aspects, the push key has a depression at the center of the key and a touch spot at the middle of the depression. When an operator's finger touches lightly or comes near the push key or the touch spot, the push key senses the touch or approach and creates a specified signal to control the dialing of a number or other functional control to prevent poor connection of the push key. Every push key is ensured to create necessary signals while reducing wear and tear on the words or icons printed on the surface of the push key. Thus, the operating procedures for the operator are simplified.

A touch panel including a light guide plate, a plurality of light sources and a plurality of detectors is provided. The light guide plate has a top surface, a bottom surface, a plurality of side surfaces and a plurality of light incident surfaces. The light sources are disposed at the light incident surfaces of the light guide plate, and the light sources have a photocell total reflection angle (α) and a photocell vertical divergence angle (β) corresponding to the light incident surfaces of the light guide plate, wherein θ<α<60°, θ is a critical angle of the total reflection angle of the light guide plate, and β<50°. The detectors are disposed corresponding to the light sources so as to receive photocell signals from the light sources.

Provided is an optical head device and an optical information recording or reproducing device for performing recording or reproduction to / from a plurality of types of optical recording medium, which can obtain a stable track error signal by a small size and exhibits high efficiency. Light PD and light PC emitted from a double-wavelength light source make incidence to a diffractive optical element in the same polarization directions. Diffraction gratings have a double refractive characteristic and in these areas the polarization directions of the two light beams become orthogonal. The light of 650 nm band is divided into 0th-order light and ±1st-order diffracted light in one of the diffraction grating and transmits through the other diffraction grating. The light of 780 nm band transmits through one of the diffraction grating and is divided into 0th-order light and ±1st-order diffracted light in the other diffraction grating. The two light beams are emitted from the diffractive optical element in the same polarization direction and guided towards the optical recording medium through a polarizing beam splitter and a quarter-wave plate.

An actuator supports a head at one end of a rotatably supported shaft unit and supports a coil of a voice coil motor at the other end, and moves the head to an arbitrary track position of a recording medium. A sensor, attached to a coil support unit of the actuator, detects the coil vibration and outputs a vibration detected signal. A control unit controls the actuator to reduce a head position error signal based on the vibration detected signal of the sensor in time of seek and in time of settling of moving the head to a target track position on the medium through drive of the actuator and drawing the same. The vibration detected signal of the sensor includes bending vibration component of the coil and the twisting vibration component of the coil when the actuator is driven.

A method for processing touch signal and an electronic device using the method are provided, wherein the method includes following steps: as receiving a touch signal of a touch panel, judging whether a motion vector of the touch panel is abnormal; when the motion vector is abnormal, recording a first time-point; judging whether the motion vector returns to normal state from abnormal state; when the motion vector returns to normal state, recording a second time-point; and performing a signal compensation operation on the touch signal of the duration between the first time-point and the second time-point. In this way, the invention can avoid inputting wrong touch signals.

A capacitive touch system including a capacitive touch sensor and a controller is provided. The sensor includes a first and a second substrate, a first and a second electrode arrangement, and a floating electrode arrangement. The first electrode arrangement and the floating electrode arrangement are disposed on different parts of the first substrate. The first and the second electrode arrangements are used to produce an electric field. A change in the characteristic of the electric field occurs when the touch sensor is touched. The floating electrode arrangement has multiple insulation slits for the electric field to pass through. The first and the floating electrode arrangements are electrically insulated through the slits, and multiple floating electrode units in the floating electrode arrangement are also electrically insulated from one another through the slits. The controller outputs a control signal based on the change in the characteristic of the electric field.

A method of generating a correlation function for a CBOC(6,1,1 / 11) signal includes generating a first correlation function by performing a first elimination operation on a first and twelfth partial correlation function pair of 12 partial correlation functions, generating a fourth correlation function by performing a first elimination operation between second and third correlation functions that are generated by performing a second elimination operation between two difference functions between sixth and seventh partial correlation functions and the first correlation function, and generating a main correlation function by summing resulting waveforms that are generated by performing a first elimination operation between each of the 12 partial correlation functions and the fourth correlation function or by performing a first elimination operation between each of the remaining 8 partial correlation functions, excluding first, sixth, seventh and twelfth partial correlation functions from the 12 partial correlation functions, and the fourth correlation function.

A method of generating the correlation function of a TMBOC(6,1,4 / 33) signal according to the present invention includes generating a signal delayed based on a phase delay 2 with respect to a signal pulse train of a TMBOC(6,1,4 / 33)-modulated received signal, generating 12 partial correlation functions by performing the autocorrelation operation of the received signal and the delayed signal with respect to a total time T(OT) , generating a sub-correlation function by performing an elimination operation of sixth and seventh partial correlation functions, and generating a main correlation function by summing results obtained by performing elimination operations between the remaining 10 partial correlation functions, excluding the sixth and seventh early partial correlation functions from the 12 partial correlation functions, and the sub-correlation function. The elimination operation is an operation satisfying algebraic relations in which |A|+|B|−|A−B|=0 when real numbers A and B are AB≦0 and |A|+|B|−|A−B|>0 when the real numbers A and B are AB>0 .

An M-sequence generator includes EXCLUSIVE-OR gates feeding back pieces of bit data from m number of series registers to the registers in response to a clock. A period of a cyclic group {(α1k), (α2k), (α3k), . . . } falls within a maximum period (2m-1), the group being produced as an element (αk) obtained by raising a root α of a polynomial to a specified power value k (k≧2), which have the terms in polynomials of a Galois field GF(2m). In a multiplying unit including the gates, pieces of bit data is fed into one end of the multiplying unit in response to the clock while the element (αk) is fed into the other end. The multiplying unit performs Galois field multiplication between each piece of bit data and the element (αk), the gate supplies the multiplication result as feedback bit data to the respective registers.

A system for controlling a weld-current in an arc welding apparatus for short arc welding comprising a current regulator included in a voltage feedback loop from a power supply to a welding electrode and a ramp generator arranged to provide current ramps during a short circuit phase at said welding electrode.

A differential output DC-DC converter capable of decreasing power consumption is presented. The differential output DC-DC converter 1 comprises output terminals VP and VM connected to both ends of load, and a switching regulator 10 for passing a source current. It further comprises a third transistor FET3, a choke coil L2, and a fourth transistor FET4 for rectifying a sink current in a flowing direction, and further a second regulator for allowing the sink current to flow, and issuing a voltage higher than a grounding point GND voltage and lower than a voltage of an output terminal VP, to an output terminal VM.