49results about How to "Sufficient amplitude" patented technology

An ultrasonic calculus treatment apparatus includes a longitudinal-vibration piezoelectric oscillator for vibrating in the axial direction of an ultrasonic transmitting member and a torsional-vibration piezoelectric oscillator for vibrating about the axial direction, and further includes driving circuits for driving the piezoelectric oscillators at respective resonance frequencies and a mode selection switch for permitting the oscillators to vibrate independently or in combination, so that lithotripsy can be performed effectively in accordance with the size of a calculus or a function of an operating tool.

Apparatus is provided that includes an electrode device, adapted to be coupled to a vagus nerve of a subject, and a control unit, adapted to drive the electrode device to apply to the vagus nerve a current that reduces heart rate variability of the subject. Also provided is a method comprising applying to a vagus nerve of a subject a current that reduces heart rate variability of the subject.

A photo acoustic trace gas detector (100) is provided for detecting a concentration of a trace gas in a gas mixture. The photo acoustic trace gas detector (100) comprises a light source (101), an optical cavity (104a, 104b), ratio modulating means (105, 111) and a transducer (109). The optical cavity (104a, 104b) contains the gas mixture and amplifies light intensity. Maximum amplification is provided when a ratio of a wavelength of the light beam and a length of the optical cavity (104a, 104b) has a resonance value. Ratio modulating means (105, 111) modulate the ratio for transformation of the light beam into a series of light pulses for generating the sound waves, an amplitude of the sound waves being a measure of the concentration of the trace gas. A transducer (109) converts the sound waves into electrical signals.

It is an object to provide a semiconductor device which can supply a signal with sufficient amplitude to a scan line while power consumption is kept small. Further, it is an object to provide a semiconductor device which can suppress distortion of a signal supplied to the scan line and shorten a rising time and a falling time while power consumption is kept small. A semiconductor device which includes a plurality of pixels each including a display element and at least one first transistor and a scan line driver circuit supplying a signal for selecting the plurality of pixels to a scan line. A light-transmitting conductive layer is used for a pixel electrode layer of the display element, a gate electrode layer of the first transistor, source and drain electrode layers of the first transistor, and the scan line. The scan line driver circuit includes a second transistor and a capacitor for holding a voltage between a gate electrode layer of the second transistor and a source electrode layer of the second transistor. The source electrode of the second transistor is connected to the scan line.

A personal audio device includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone is also provided proximate the speaker to provide an error signal indicative of the effectiveness of the noise cancellation. A secondary path estimating adaptive filter is used to estimate the electro-acoustical path from the noise canceling circuit through the transducer so that source audio can be removed from the error signal. Noise is injected so that the adaptation of the secondary path estimating adaptive filter can be maintained, irrespective of the presence and amplitude of the source audio. The noise is shaped by a noise shaping filter that has a response controlled in conformity with at least one parameter of the secondary path response.

The invention relates to a medical implantable lead of the kind being adapted to be implanted into a human or animal body for monitoring and / or controlling of an organ inside the body. The lead comprises in a distal end a tubular header (3) inside which a shaft (7) is rotatable as well as extendable and retractable arranged and carries in a distal end a combined fixation means and electrode member in form of a helix (4), which is provided with a first contact surface being electrically connectible to a connector at the proximal end of the lead by means of an electric conductor (8), and which by means of the shaft is rotatable in relation to the lead and extendable out from the distal end to be able to fixate the distal end of the lead to the organ by being screwed into the tissue. The shaft also carries a second contact surface (13) being positioned on or adjacent a proximal portion of the helix and being connectible to a connector at the proximal end of the lead by means of an electric conductor (8). The lead comprises a conduction controlling means (14), which at least during an initial stage after implantation is capable of render the first contact surface electrically inactive and which is capable of render the first contact surface electrically active after the initial stage. By means of the inventive lead it is possible to detect whether the helix is sufficient screwed into the tissue (12) or not.

An electromotive drive is provided, especially for the pump of a power-assisted steering system of a motor vehicle. The drive includes a housing (3) with a bearing journal (15) in which the shaft (18) of a rotor (9) is rotationally mounted. The drive also includes a stator (7) having drive windings. The bearing journal (15) extends through said stator and supports it. The stator (7) is supported by the bearing journal (15), substantially in the transversal direction only. The stator (7) is coupled with the remaining housing (3) in a rotationally fixed manner, so as to transmit the engine torque. The arrangement dramatically reduces disturbing noises which occur especially when the motor is operated at full load and which are caused by relatively high-frequency torque variations.

An adaptive equalizer circuit equipped by a control unit for controlling an equalizer circuit, comprising a detection unit for detecting an identity of a preset data pattern with a data pattern as a result of data judgment for an output of the equalizer circuit, a monitor unit for sequentially monitoring an input to a gain amplifier for each of a plurality of filters constituting the equalizer circuit and an output thereof every time the identity detection unit detects an identity, and a unit for making the control unit operate an adaptive equalization control by providing the control unit with the monitoring result, thereby making it possible to track a great change in a characteristic of transmission line without using a matrix responding to the characteristic of the transmission line or a convolution operation by using the matrix.

The present invention provides a touch panel input device that reliably prevents degradation of a piezoelectric substrate. During inactive periods in which a touch panel input device is not used, the connection between a set of output terminals of an AC power supply circuit and a set of associated drive electrodes on the piezoelectric substrate is switched with a selector switch so that the drive electrodes are shorted. During inactive periods, no DC potential is applied to the set of drive electrodes even if a charged conductive body comes into contact with the drive electrodes or a drive power source pattern connected thereto. This makes it possible to prevent the degradation of the piezoelectric substrate.

Techniques are provided for controlling and delivering spinal cord stimulation (SCS) or other forms of neurostimulation. In one example, neurostimulation pulses are generated wherein successive pulses alternate in polarity so that a pair of electrodes alternate as cathodes. Each pulse has a cathodic amplitude sufficient to achieve cathodic capture of tissues adjacent the particular electrode used as the cathode for the pulse. The neurostimulation pulses are delivered to patient tissues using the electrodes to alternatingly capture tissues adjacent opposing electrodes via cathodic capture to achieve a distributed virtual stimulation cathode. Various pulse energy savings techniques are also set forth that exploit the distributed virtual stimulation cathode.

A fluidic logic and actuator system for outputting a displacement having a fluidic logic circuitry layer including a fluidic control input and a plurality of fluidic latching memory units. At least some of the plurality of fluidic latching memory units are configured to perform combinatorial and sequential logic functions and output a fluid response. A fluid actuator layer is provided having a plurality of fluid actuators, wherein each of the plurality of fluid actuators being movable in response to the fluid response of a corresponding one of the plurality of fluidic latching memory units.

Medical system for detecting heart events including an electrode lead provided with a multi-dot electrode unit that comprises at least three dot electrodes, said multi-dot electrode unit is adapted to be used for intra-corporal sensing of heart signals. The heart signals sensed by each of the dot electrodes am applied to a processing means where the signals are combined and a synthetic reference signal is determined. The differences between each dot electrode heart signal and the synthetic reference voltage are determined, and an indication signal is formed based upon said differences, wherein said indication signal is used to detect heart events.

A micro-speaker is disclosed. The micro-speaker includes a frame defining a hollow space, a diaphragm attached to the frame, a voice coil positioned on the diaphragm, a cover covering the diaphragm and attached to the frame forming a housing, a yoke received in the hollow space and attached to the frame, a magnet received in the yoke, and a pole plate attached on the magnet. The yoke includes a bottom wall, and two ends of the base wall are provided with a groove corresponding to the magnetic gap, respectively. A width of the groove is greater than that of the thickness of the voice coil.

A backplane bus system and related method for increasing the throughput of cPCI-specified backplane architectures. The system includes an interposer card for transforming reflective-wave switching into incident-wave switching. Establishing incident-wave switching on the bus along with careful slot pitch and impedance layout increases the rate at which the voltage amplitude observed by all receivers connected to the bus is sufficient to produce a change of state on the first signal propagation down the bus. Most existing peripherals are configured with transceivers that produce reflective-wave switching. The present system includes an interposer card to transform that switching into incident-wave switching. A preferred transceiver for doing so and that is implemented on the interposer card is a GTLP transceiver. A state machine is employed to regulate operation of the incident-wave switching transceiver. The system may be used to permit implementation of as many as 21 slots on a conventional cPCI backplane.

The invention relates to an arrangement and method for estimating the linear and nonlinear parameters of a model 11 describing a transducer 1 which converts input signals x(t) into output signals y(t) (e.g., electrical, mechanical or acoustical signals). Transducers of this kind are primarily actuators (loudspeakers) and sensors (microphones), but also electrical systems for storing, transmitting and converting signals. The model describes the internal states of the transducer and the transfer behavior between input and output both in the small-and large-signal domain. This information is the basis for measurement applications, quality assessment, failure diagnostics and for controlling the transducer actively. The identification of linear and nonlinear parameters Pl and Pn of the model without systematic error (bias) is the objective of the current invention. This is achieved by using a transformation system 55 to estimate the linear parameters Pl and the nonlinear parameters Pn with separate cost functions.

An adaptive equalizer circuit equipped by a control unit for controlling an equalizer circuit, comprising a detection unit for detecting an identity of a preset data pattern with a data pattern as a result of data judgment for an output of the equalizer circuit, a monitor unit for sequentially monitoring an input to a gain amplifier for each of a plurality of filters constituting the equalizer circuit and an output thereof every time the identity detection unit detects an identity, and a unit for making the control unit operate an adaptive equalization control by providing the control unit with the monitoring result, thereby making it possible to track a great change in a characteristic of transmission line without using a matrix responding to the characteristic of the transmission line or a convolution operation by using the matrix.

Processes for high speed machining of workpiece materials using high performance tools with prolonged tool life and improved surface finish are provided by vibrating the tool and / or the workpiece at a frequency greater than the frequency of shear localization in the primary shear zone or chip segmentation occurring in the absence of tool vibration, with an amplitude sufficient to break up the tool-chip atomic contact, thereby decreasing the tool-chip contact length through decreasing the tool-chip contact time, thereby suppressing accelerated chemical tool wear caused by dissolution of the tool into the workpiece by nanocrystalline grain boundary diffusion and grain boundary sliding mechanisms by preventing shear localization associated with nanocrystalline grain formation in the primary shear zone of the chip, and suppressing oxidation wear of the tool by preventing segmentation of the chip.

Disclosed are systems and methods for using a semiconductor optical amplifier (SOA) as an optical modulator for pulsed signals. In accordance with the principles of the invention, the SOA can be biased with a negative voltage to suppress transmission and improve modulator extinction and biased with a positive pulsed signal with sufficient amplitude to forward bias the amplifier (SOA), both transmitting the carrier and increasing its amplitude by means of a gain provided by the SOA under forward biased conditions. In addition, the forward bias voltage may be selected to compensate for losses within the SOA.

A system and method for monitoring and mitigating leakage currents is disclosed. The data acquisition system records data from multiple monitoring locations over extended periods of time to identify stray voltage and / or leakage currents present at the monitoring location. The data is processed to identify trends in the stray voltage and / or leakage currents and to suggest methods for mitigating the same.

Provided is an electronic device including a touch panel 10, a plurality of tactile sensation providing units 20a-20h configured to provide a tactile sensation to a contact object F in contact with the touch panel 10, and a plurality of first controllers 30a-30d configured to control drive of the plurality of tactile sensation providing units 20a to 20g, in which one first controller of the plurality of first controllers 30a-30d outputs, to other first controller, a synchronization signal that drives a tactile sensation providing unit associated with the other first controller.

Processes for high speed machining of workpiece materials using high performance tools with prolonged tool life and improved surface finish are provided by vibrating the tool and / or the workpiece at a frequency greater than the frequency of shear localization in the primary shear zone or chip segmentation occurring in the absence of tool vibration, with an amplitude sufficient to break up the tool-chip atomic contact, thereby decreasing the tool-chip contact length through decreasing the tool-chip contact time, thereby suppressing accelerated chemical tool wear caused by dissolution of the tool into the workpiece by nanocrystalline grain boundary diffusion and grain boundary sliding mechanisms by preventing shear localization associated with nanocrystalline grain formation in the primary shear zone of the chip, and suppressing oxidation wear of the tool by preventing segmentation of the chip.

The present invention provides a method, system and apparatus for providing failsafe detection for a differential receiver. A bus activity signal (11) is activated when receiving a differential data signal of sufficient amplitude to transition through a predetermined threshold. A failsafe signal (620) indicates a low differential voltage condition. A countdown time period commences (85) upon activation of either signal, and a failsafe condition is determined (89) to exist if the failsafe signal is active (87) when the countdown time period expires (86).

A personal audio device includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone is also provided proximate the speaker to provide an error signal indicative of the effectiveness of the noise cancellation. A secondary path estimating adaptive filter is used to estimate the electro-acoustical path from the noise canceling circuit through the transducer so that source audio can be removed from the error signal. Noise is injected so that the adaptation of the secondary path estimating adaptive filter can be maintained, irrespective of the presence and amplitude of the source audio. The noise is shaped by a noise shaping filter that has a response controlled in conformity with at least one parameter of the secondary path response.

PROBLEM: To generate a self-oscillation in a stable manner and at a low cost in a self-oscillating radio frequency oscillation circuit for high-power applications used for plasma generation in an ICP emission spectrometer or for other purposes.SOLUTION: A secondary winding 38 of a starting transformer is arranged in an LC resonance circuit 30 including an induction coil 9, capacitor 36 and other elements. A starter 6, e.g. a Clapp oscillator circuit, is connected to a primary winding 5 magnetically coupled with the winding 38. A radio-frequency current is induced in the LC resonance circuit 30 through the primary and secondary windings 5 and 38 by energizing the starter 6 for a certain period of time in a starting phase. As a result, electric current flows through the secondary windings 11, 14, 17 and 20 in a full-bridge drive circuit 10 which are magnetically coupled with primary windings 32, 33, 34 and 35, respectively, whereby voltage is developed between the gate and source of MOSFETs 13, 16, 19 and 22, causing these MOSFETs 13, 16, 19 and 22 to begin an ON / OFF operation, whereby the self-oscillation is started.