58results about How to "Extended sampling time" patented technology

A multiphase power supply circuit comprises a PWM (pulse-width modulation) chip and a plurality of sub-circuits. Each sub-circuit comprises an inductor, a first resistor, a first capacitor, a differential line pair, a second resistor and a second capacitor. The first resistor and the first capacitor in each sub-circuit are serially connected, and then are parallelly connected with the inductor in the sub-circuit. The differential line pair in each sub-circuit comprises a first differential line and a second differential line. The first differential line in each sub-circuit is connected between a joint of the corresponding first resistor and the corresponding first capacitor and a terminal of a current sensor of the PWM chip. One end of the second resistor in each sub-circuit is electrically connected to a joint of the corresponding capacitor and the corresponding inductor, one end of the second resistor in each sub-circuit is serially connected with the corresponding second capacitor while the other end of the second capacitor is ground, the second differential line in each sub-circuit is electrically connected between a joint of the corresponding second resistor and the corresponding second capacitor and another terminal of a current sensor of the PWM chip, and the ratio of capacitances of the second capacitors of the sub-circuits is equal to that of lengths of the corresponding differential line pairs. The circuit can prolong sampling time of the long differential line pairs, and increases sampling accuracy.

The A / D converter has first and second PPDC circuits (pulse-phase-difference coding circuits). The first PPDC circuit performs A / D conversions on the reference voltage and on the voltage signal amplified by an amplifier in an alternating sequence, the amplifier using the reference voltage as a potential base thereof. The second PPDC circuit performs A / D conversions always on the reference voltage. The A / D-converted data set of the voltage signal outputted from the first PPDC circuit is corrected depending on the difference between the A / D-converted data set of the reference voltage outputted from the second PPDC circuit when the first PPDC circuit A / D-converts the reference voltage and the A / D-converted data set of the reference voltage outputted from the second PPDC circuit when the first PPDC circuit A / D-converts the voltage signal.

The presence or absence of objects (e.g., medical implements, medical supplies) tagged with transponders may be determined in an environment in which medical procedures (e.g., surgery) are performed via an interrogation and detection system which includes a controller and a plurality of antennas positioned along a patient support structure. The antennas may, for example, be positioned along an operating table, bed, a mattress or pad or a sheet and may be radiolucent. Respective antennas may successively be activated to transmit interrogation signals. Multiple antennas may be monitored for responses from transponders to the interrogation signals. For example, all antennas other than the antenna that transmitted the most recent interrogation signal may be monitored.

Systems and methods for thermal sensing and imaging using the electro-optic effect. A thermal detection system comprises a temperature sensing element that includes an electro-optic (EO) material layer having a length axis and characterized by a temperature dependent index of refraction, an electrical mechanism for inducing a chance in the index of refraction, a laser beam propagating lengthwise through EO layer for probing the refraction index change, and a light intensity meter for measuring a laser beam intensity change caused by the temperature dependent refraction index change. Thermal imaging is obtained by using a pixel array of such thermal sensing elements. The intensity reading may be done in either a cross-polarizer or a Mach Zehnder Interferometry reading configuration.

The presence or absence of objects (e.g., medical implements, medical supplies) tagged with transponders may be determined in an environment in which medical procedures (e.g., surgery) are performed via an interrogation and detection system which includes a controller and a plurality of antennas positioned along a patient support structure. The antennas may, for example, be positioned along an operating table, bed, a mattress or pad or a sheet and may be radiolucent. Respective antennas may successively be activated to transmit interrogation signals. Multiple antennas may be monitored for responses from transponders to the interrogation signals. For example, all antennas other than the antenna that transmitted the most recent interrogation signal may be monitored.