摘要:
A step voltage generator for outputting a step voltage from an output terminal. The step voltage generator includes a voltage dividing circuit having a plurality of dividing elements serially connected to each other and disposed between two power sources of different voltage levels for voltage dividing the potential difference between the two power sources. The step generator further includes a switching circuit having a plurality of switch devices serially connected to each other and similarly disposed between the two power sources. The end switch device of the serially connected bunch is connected to the output terminal. A trigger circuit turns on the switch devices sequentially starting with the one closest to the output terminal. A plurality of reverse flow preventive circuits prohibit current through a switch device most recently turned on from flowing through a voltage dividing element previously turned on and which remains on.
摘要:
An object is to provide a semiconductor element module having high reliability, superior electric connection and thermal connection and capable of securing sufficient cooling performance, and also to provide a method for manufacturing the same. The semiconductor element module (1) comprises an IGBT (2) and a diode (3) having electrodes formed on surfaces of both sides thereof, a ceramic substrate (7), in which thermal conductivity is high, having wiring circuit layers (4, 5) formed on the surface thereof for bonding to surfaces of one side of the IGBT (2) and the diode (3), a ceramic substrate (8), in which thermal conductivity is high, having a wiring circuit layer (6) formed on the surface thereof for bonding to surfaces of other side of the IGBT (2) and the diode (3), and a sealing member (11) which is sandwiched between the outer edges of the ceramic substrates (7, 8) for sealing inside thereof; and these members are bonded by room-temperature bonding.
摘要:
An object is to provide a semiconductor element module having high reliability, superior electric connection and thermal connection and capable of securing sufficient cooling performance, and also to provide a method for manufacturing the same. The semiconductor element module (1) comprises an IGBT (2) and a diode (3) having electrodes formed on surfaces of both sides thereof, a ceramic substrate (7), in which thermal conductivity is high, having wiring circuit layers (4, 5) formed on the surface thereof for bonding to surfaces of one side of the IGBT (2) and the diode (3), a ceramic substrate (8), in which thermal conductivity is high, having a wiring circuit layer (6) formed on the surface thereof for bonding to surfaces of other side of the IGBT (2) and the diode (3), and a sealing member (11) which is sandwiched between the outer edges of the ceramic substrates (7, 8) for sealing inside thereof; and these members are bonded by room-temperature bonding.
摘要:
For a combination of a first movable body adaptive for an automatic motion to provide an equivalent service to a required service, and a second movable body capable of exercising a voluntary motion and to cooperate with the first movable body to provide the voluntary motion as one of assistance and teaching to the first movable body to sophisticate the automatic motion, there are provided a first controller operative in a first mode for controlling the first moving body to exercise the automatic motion and in a second mode for adapting the first movable body to cooperate with the second movable body so that the automatic motion is sophisticated to be capable of achieving an equivalent service to the required service in a sophisticated manner, and a second controller for selecting one of the first and second modes.
摘要:
The pair of vertical deflection electrode plates 13 in the double sweeping streak camera are supplied with a voltage of a sawtooth wave in synchronization with the input optical beam pulses. The other pair of horizontal deflection electrode plates 14 are supplied with a voltage of a stepped wave in synchronization with the sawtooth wave. The deflection electrode plates 13 and 14 sweep successively-incident photoelectrons. The photoelectrons are then detected at the phosphor screen 16. The phosphor screen 16 is therefore recorded with temporal changes in the spatial pattern of the optical beam pulse as an image of regularly-arranged optical beam patterns. The image analyzing device can easily analyze the image.