摘要:
PROBLEM TO BE SOLVED: To provide a driving circuit for an electric load, which detects a state of a load connected erroneously. SOLUTION: An electronic circuit (100) is disclosed, having: a node (EX) connectable to a load (LD) to be driven; and a power device (PD) with a first terminal connected to the node, to be switched between activation and deactivation. The circuit further has: a current generator (I) having an output connected to the node, which can be switched to an enabled state, at least when the power device is deactivated; and a comparator (CP) for comparing a voltage of the node (V(EX)) with a reference voltage (V(REF)). The comparator is configured to obtain comparison results (RESETN), from which a distinct condition of electric connection of the load to the node is detected. COPYRIGHT: (C)2011,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a method of protection from noise of a digital signal generated by a comparator.SOLUTION: The method of protection from noise of a digital signal (Vcomp) includes: a step of generating an output signal (Vout) which switches from a first logic state to a second logic state at a first switching of logic state of the digital signal (Vcomp) generated by a comparator 1; a step of detecting a change from the first logic state to the second logic state of the output signal (Vout); and a step of inhibiting further switchings of the output signal (Vout) for a first time interval after change from the first logic state to the second logic state.
摘要:
PROBLEM TO BE SOLVED: To provide a high-sensitive vibrating gyroscope with the acceleration noise reduced. SOLUTION: This is the integrated microelectromechanical structure 30 comprising a driving mass 3 designed so as to be fixed on substrate with an elastic fixed element 8a' and subjected to driven motion on xy within a plane, and both the first sensing mass 15a and second sensing mass 15b suspension-supported inside the driving mass 3 and combined with the driving mass 3 by each elastic fixed element 18, respectively, so as to be fixed on the driving mass 3, as well as, make each detecting motion, in response to angular velocity. Especially, these first sensing mass 15a and second sensing mass 15b are mutually combined by elastic combining elements 32a/32b so as to combine own vibration modes. COPYRIGHT: (C)2010,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a vertical conduction electronic power device in which an output resistance, thermal resistance, size and gate change value are reduced. SOLUTION: The vertical conduction electronic power device includes gate areas 20, source areas 25 and drain areas 30 in an epitaxial layer 40 on a semiconductor substrate 10; gate sections 21, source sections 26 and drain sections 31 formed by a first metallization level; and gate terminals/pads, source terminals/pads 65 and drain terminals/pads formed by a second metallization level. The device extends perpendicularly to the substrate 10 and is provided with sinker structures 45 formed by grids of sinkers S arranged under both of first and second regions of individual drain areas 30. The sinker structure operates as an electrical conduction channel for the current directing from the source area 25 to the drain area 30 through the substrate 10. COPYRIGHT: (C)2006,JPO&NCIPI
摘要:
PROBLEM TO BE SOLVED: To reduce a quantization noise in a frequency band positioned outside a band used for a signal. SOLUTION: The power amplification device is provided with an input part for receiving a signal having a useful frequency band, and a power amplification means of the delta-sigma type. The power amplification means of the delta-sigma type (MAP) exhibits an order greater than or equal to one in the useful band of the signal and an order greater than or equal to one outside the said useful band. Thus, a position of a zero point of a noise transmission function can be adjusted to adjust an S/N in the useful band, and a value of one or multiple frequency bands positioned outside the useful band of which the quantization noise is desired to be minimized, is made adjustable. COPYRIGHT: (C)2004,JPO&NCIPI
摘要:
PROBLEM TO BE SOLVED: To provide a switching circuit control device for a resonant converter that has a DC current output. SOLUTION: A half-bridge consisting of a first transistor Q1 and a second transistor Q2 generates a cyclic square wave voltage for driving a resonant circuit 300 for a resonant converter. A control device 100 has a circuit means 101 adapted to control the half-bridge according to a charging or discharging time period of a capacitor Ct and to synchronize the start time Tstart of a discharging or charging time period of the capacitor Ct that crosses a zero value of the signal Vs representing the current Is flowing in the resonant circuit 300; and additional means 102 and 103 adapted to control switching-off of the first transistor Q1 or the second transistor Q2 at the end of the discharging or charging time period of the capacitor Ct. COPYRIGHT: (C)2011,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a process for manufacturing integrated membrane of nozzles in MEMS technology and a spray device including the membrane without defects of conventional technology. SOLUTION: The process for manufacturing a membrane of nozzles of a spray device, comprises the steps of laying a substrate (11), forming a membrane layer (13) on the substrate (11), forming a plurality of nozzles (14) in the membrane layer (13), forming a plurality of supply channels (15) in the substrate (11), each supply channel (15) being substantially aligned in a vertical direction to a respective nozzle of the plurality of nozzles (14) and directly communicating with the respective nozzle (14). COPYRIGHT: (C)2010,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a method for controlling a load current even when a current ripple significantly varies. SOLUTION: The method includes: (A) a step of setting a threshold value of a comparator in correspondence to a reference current value for a load; (B) a step of measuring a first time interval from an active ON state of an ON phase of a power stage to a point of time when the load current reaches the reference current value; and (C) a step of continuously maintaining the power stage in the ON phase. Step (C) is performed while the power stage is further maintained in the predictive ON state for an additional time interval. The additional time interval is determined based on an average value of the first time interval and a time interval of the active ON state measured during a past PWM (pulse width modulation) cycle. COPYRIGHT: (C)2010,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a low noise amplifier showing a fixed input resistance, or showing satisfactory linearity when an input signal is high and a satisfactory noise pattern when the input signal is low. SOLUTION: This low noise amplifier is provided with a first circuit block capable of amplifying a first voltage signal that is input to the amplifier. The first circuit block includes a first terminal coupled to a first power supply voltage by a first variable resistance and a second terminal coupled to a second power supply voltage. The second terminal is coupled to the output terminal of the amplifier, and the input voltage signal is applied to a further terminal of the first circuit block. The amplifier also includes a feedback network coupled to the output terminal and to the further terminal of the first circuit block, and a second circuit means (3) coupled between the second power supply voltage and the other terminal of the first circuit block. The second circuit means is adapted to compensate for variations in the value of the first variable resistance to ensure the substantially constant input resistance of the amplifier. COPYRIGHT: (C)2006,JPO&NCIPI
摘要:
PROBLEM TO BE SOLVED: To provide a method of manufacturing an inertial sensor having a failure threshold. SOLUTION: A process of manufacturing the inertial sensor, having a failure threshold includes the steps of: on the substrate 2 of a semiconductor wafer 1, forming at least one sample element 6 embedded in a sacrificial region 3 and 12; on the sacrificial region 3 and 12, forming a body 18 connected to the sample element 6; and etching the sacrificial region 3 and 12 to free the body 18 and the sample element 6. COPYRIGHT: (C)2004,JPO