113results about How to "Improve S/N ratio" patented technology

Each pixel is provided with a photoelectric converting device S1(1-1) or the like, a source-follower-type first transistor T1(1-1) or the like, a second transistor Te(1-1) to be turned on when reading an electrical signal from a pixel selected by a shift register SR1 for each line and outputting the signal to a readout circuit unit and a third transistor T3(1-1) to be turned on when resetting a photoelectric converting device set to a pixel selected by a shift register SR1 for each line. Moreover, a bias power source for supplying a photoelectric conversion bias to a photoelectric converting device and a reset power source for supplying a reset bias to a photoelectric converting device are set in the readout circuit unit. By using the radiation image pickup apparatus and its control method, it is possible to improve the S / N ratio while restraining noises and preferably, it is possible to perform stable and high-speed dynamic-image photographing and restrain dark current.

A capacitance detecting circuit detects, in terms of voltage, change in capacitance at intersections of a plurality of column lines and a plurality of row lines crossing each other. The capacitance detecting circuit includes a column-line driving unit for driving a column line; a row-line selector for selecting a specific row line from the plurality of row lines; and a capacitance calculator for calculating a capacitance at an intersection of the specific row line and the driven column line based on a reference current that flows in relation to a reference capacitance and a current that flows in relation to the capacitance at the intersection.

To improve an S / N ratio and increase a measurement accuracy of an organism information. There is provided an organism information measuring device possessing a main body disposed under a state that its lower face has contacted with an organism surface, a light irradiating part which is disposed in the lower face of the main body and irradiates a light toward an organism, a 1st light receiving part which is disposed in the lower face of the main body and near the light irradiating part, receives a backward scattered light from the organism and generates an organism information signal complying with a received light quantity, a 2nd light receiving part which is disposed in the lower face of the main body and in a position spaced from the light irradiating part more than a distance between the 1st light receiving part and the light irradiating part, receives a backward scattered light from the organism and generates an organism information signal complying with a received light quantity, and an organism information operating part which calculates an organism information on the basis of the organism information signals having been generated by the 1st light receiving part and the 2nd light receiving part.

An image capturing apparatus includes: an image sensor including image sensing pixels that generate a signal for image generation, and focus detection pixels dividing the pupil region of an imaging lens into pupil regions and generating a signal for phase difference detection by photoelectrically converting object images from the pupil regions obtained by the division; a switching unit that switches between an all-pixel readout mode in which signals from all of the multiple pixels are read out and a thinning readout mode in which the signals of the multiple pixels are thinned and read out; and a control unit that, in the case where the mode has been switched by the switching unit to the thinning readout mode, controls the accumulation of charges in imaging rows used for image generation and focus detection rows including the focus detection pixels independent from each other.

The information such as address is to be efficiently formed into wobble components and further the S / N ratio in reproducing the information formed into the wobble components is to be improved. In an optical disc of the present invention, there are recorded in a wobble the address information modulated in accordance with the MSK (minimum shift keying) system and the address information modulated in accordance with a modulation system in which even harmonics signals are added to a sinusoidal carrier signal and in which the polarity of the harmonics signal is changed depending on the sign of the data for modulation.

In a liquid crystal display device, noise light to a photodetecting element is reduced, whereby an improved S / N ratio is achieved. The liquid crystal display device includes: a first substrate (100) on which a pixel circuit is provided; a second substrate (101) arranged so as to face the first substrate (100) with a liquid crystal layer (30) being interposed therebetween; a photodetecting element (17) provided on the first substrate (100); and a detection light filter (18) that is provided between the photodetecting element (17) and the liquid crystal layer (30) and that cuts off light in a band outside a signal light band that is a band of light to be detected by the photodetecting element (17).

An optical system of an atomic oscillator that regulates an oscillation frequency by using an optical absorption property by one of a double resonance method utilizing light and micro waves and a coherent population trapping (CPT) method utilizing a quantum interference effect produced by two kinds of resonance light, includes: a light source emitting the resonance light; a gas cell disposed at an emitting side of the light source, sealing a gaseous metal atom therein and transmitting the resonance light through a metal atom gas; a light detecting unit detecting the transmitted light that is transmitted through the metal atom gas; and a fluorescence blocking unit blocking at least a part of fluorescence, which is emitted from the metal atom gas to the light detecting unit, and disposed between the metal atom gas and the light detecting unit.

A detector that detects a detection signal corresponding to a driving vibration, which excites a vibrator in an oscillation loop, and a physical quantity to be measured, includes: an amplifying circuit that amplifies a signal corresponding to the driving vibration and the physical quantity; a synchronous detection circuit that detects the amplified signal of the amplifying circuit in synchronization with an oscillation signal in the oscillation loop; an impedance conversion circuit that converts an output impedance of the synchronous detection circuit; a first low pass filter to which an output signal of the impedance conversion circuit is supplied and which outputs a first detection signal; and a second low pass filter to which the output signal of the impedance conversion circuit is supplied and which outputs a second detection signal.

An ultrasonic diagnostic apparatus has a scanning executing unit, a Doppler signal obtaining unit, a storage unit, a removing unit, a blood flow information obtaining unit, and a B-mode image generating unit. The scanning executing unit executes a first scanning that is iteratively performed by a predetermined period so as to obtain a B-mode image of an object and executes a second scanning that is iteratively performed a predetermined number of times by a first period between the first scanning so as to obtain a two-dimensional distribution of a blood flow information and that is iteratively performed by a second period while inserting the first scanning. The Doppler signal obtaining unit sequentially obtains a Doppler signal from a reflection signal obtained by the second scanning. The storage unit stores, for each raster direction, a Doppler signal string at unequal time intervals collected for the first period and the second period by the Doppler signal obtaining unit. The removing unit obtains a blood flow signal by reading the Doppler signal string at the unequal time intervals from the storage unit and removes a signal component with a small motion. The blood flow information obtaining unit obtains the blood flow information based on the blood flow signal. The B-mode image generating unit generates the B-mode image based on the reflection signal obtained by the first scanning.

A method of producing a magnetic recording medium includes forming a underlayer on a base, and successively forming, on the underlayer, a first magnetic layer, a nonmagnetic coupling layer and a second magnetic layer. The first and second magnetic layers are exchange-coupled via the nonmagnetic coupling layer and have antiparallel magnetizations in a state where no external magnetic field is applied on the magnetic recording medium. The underlayer is made of Cr or a Cr alloy having a bcc crystal structure within an atmosphere including nitrogen gas.

The S / N ratio is improved for recording data to grooves (2-1,2-2) of an optical disc so that as much information as possible can be recorded at the lowest possible frequency band. An optical disc using wobble patterns to record different information has a first groove (2-1) having a first wobble pattern (22) in which one wobble period has a sharp rising edge and a gradual falling edge; and a second groove (2-2) having a second wobble pattern (24) in which one wobble period has a gradual rising edge and a sharp falling edge. Each of the first and the second wobble pattern is represented by a first fundamental and a second harmonic of a Fourier series. The polarity of the second harmonic, which is an even harmonic, of the second wobble pattern is opposite that of the first wobble pattern. A method for manufacturing this optical disc is also provided.

An antenna of the invention comprises a magnetic main-path member comprising a coil wound around a magnetic core, and a magnetic sub-path member magnetically connected to the magnetic core for constituting a substantially closed magnetic path with the magnetic main-path member, the antenna meeting the relation of (S / N)1>(S / N)0, wherein (S / N)1 is a ratio of a signal voltage S obtained from the coil to a noise voltage N in this antenna, and (S / N)0 is a ratio of a signal voltage S to a noise voltage N in an antenna having the same structure except for having no magnetic sub-path member.

A light amount detecting apparatus includes: a photoelectric converting element converting quantity of light inputted to current; a current / voltage converting device having a positive input terminal connected to a first terminal of the photoelectric converting element, a negative input terminal connected to a second terminal of the photoelectric converting element, a negative output terminal for reversing polarity of a current inputted to the positive input terminal and outputting it as a voltage, a positive output terminal for reversing polarity of a current inputted to the negative input terminal and outputting it as a voltage, a first negative feedback resistor connecting the positive and negative output terminals, and a second negative feedback resistor connected between the negative and positive output terminals, the current / voltage converting device setting the photoelectric converting element in zero bias and converting the converted current to the voltage; and an amplifying device for amplifying the converted voltage.