摘要:
A semiconductor laser driving device using FET's as a positive element in a bias current supply circuit and a pulse current supply circuit, and having compensating circuits for compensating differences in the characteristics of the FET's and a laser diode used in the driving device. Also a pulse amplifier suitable for use as the pulse current supply circuit in the semiconductor driving device, which circuit cuts off a pulse top side portion and a pulse base side portion of an input pulse with respect to a mesial point of the input pulse to obtain an output pulse having a desired pulse amplitude in response to a control signal, without varying a pulse width.
摘要:
A semiconductor laser driving device using FET's as a positive element in a bias current supply circuit and a pulse current supply circuit, and having compensating circuits for compensating differences in the characteristics of the FET's and a laser diode used in the driving device. Also a pulse amplifier suitable for use as the pulse current supply circuit in the semiconductor driving device, which circuit cuts off a pulse top side portion and a pulse base side portion of an input pulse with respect to a mesial point of the input pulse to obtain an output pulse having a desired pulse amplitude in response to a control signal, without varying a pulse width.
摘要:
A slice amplifier using field effect transistors (FET's) is provided which is suitable for achieving a correct discrimination of logics "0" and "1" of an input signal (S.sub.in) at very high speed by reshaping the input signal (S.sub.in) into rectangular shaped pulses (S.sub.out). The top and bottom of each pulse are determined to predetermined constant levels by using a first FET (T.sub.1) and a second FET (T.sub.2) with the aid of a first monitor and control unit (41) and second monitor and control unit (42). The first and second monitor and control units (41, 42) monitor the drain voltages of the first and second FET's (T.sub.1, T.sub.2) and control the gate-source voltages thereof, respectively, so as to realize the predetermined constant levels.
摘要:
The optical amplifier includes a doped fiber doped with a rare earth element, a pumping light source, means for introducing signal light and pumping light into the doped fiber, detection means for detecting whether or not amplified signal light is included in light outputted from the doped fiber, and means for decreasing the intensity of the pumping light when it is detected that amplified signal light is not included. It can be possible to eliminate an influence of an optical surge arising from a characteristic of the doped fiber.
摘要:
The control circuit for supplying a driving current to a laser diode makes it possible to keep the laser driving current variable in a wide range. The control circuit includes a laser diode, a photo diode for receiving a part of an optical output emitted from the laser diode and outputting an electrical signal corresponding to a level of the optical output, a first current supplying circuit for supplying a bias current to the laser diode, a first monitor circuit for monitoring a size of a signal driving current supplied by the first current supplying circuit, a second monitor circuit for monitoring a size of the bias current supplied by the second current supplying circuit, a first feed-back loop for controlling the signal driving current supplied from the first current supplying circuit by the output of the first monitor circuit, as a reference of the electric signal outputted from the photo diode corresponding to the level of the optical output emitted from the laser diode, a second feed-back loop for controlling the bias current supplied from the second current supplying circuit by the output of the second monitor circuit, as said reference of the signal outputted from the photo diode corresponding to the level of the optical output emitted form the laser diode; and an adder circuit for adding an offset current of the signal driving current supplied from the first current supplying circuit on the outside of the first feed-back loop.
摘要:
It is possible to control a welding in a high speed and a high precision large electric current, and consumption electric power is also reduced. In the welding transformer, a loop magnetic core 25, a wound primary coil 12, plural positive side coils 14 and plural negative side coils 16 that are alternately sandwiched between respective gaps 12a of the primary coil 12, are comprised. A coil is fixed on the other surface of a contact base member 62. On the other surface of the contact base member 62, a first connection polar board 44 is electrically connected to a positive side electric conductor 30 through the first connection polar board 44. A negative side coil 16 is electrically connected to a negative side electric conductor 32. The connecting part of the positive side coil 14 and the negative side coil 16 is electrically connected to the third connection polar board 48. By sandwiching a thin insulation layer 31, a positive side electric conductor 30, a rectifying device 18 and a first polar board 34 are arranged on one side; A negative side electric conductor 32, a rectifying device 20 and a second polar board 36 are arranged on the other side; and the first polar board 34 and the second polar board 36 are electrically connected to a third polar board 38. It is possible to use by combining plural units and by connecting an output side in parallel in a small size and a large capacity.
摘要:
An information processing apparatus that acquires first posture information corresponding to the information processing apparatus and a first distance coordinate corresponding to the information processing apparatus, and second posture information corresponding to another information processing apparatus and a second distance coordinate corresponding to the another information processing apparatus. The information processing apparatus then calculates an object's position in a virtual space based on the first and second posture information and the first and second distance coordinates.
摘要:
When extrusion of a molten resin by means of an extruder is started, a simple polyetherimide resin is melt extruded from a lip portion 7a of a T-die 7, and a film of the simple polyetherimide resin is molded. The molding material is then switched to a resin composition including the polyetherimide resin and a fluorine resin and then a film of the resin composition is continuously extruded and molded from the T-die 7. Having been covered with a very thin film 8a of the simple polyetherimide resin, on a flow passage face of the lip portion 7a of the T-die 7, a resin composition layer 8b including a polyetherimide resin and a fluorine resin, which has affinity with the film 8a, is then formed at a center part.
摘要:
According to one embodiment, a solid state imaging device includes a sensor substrate curved such that an upper face having a plurality of pixels formed is recessed and an imaging lens provided on the upper face side.
摘要:
An airbag system is configured to fulfill its role on a saddle-ride type vehicle even when the vehicle collides with a side of a vehicle moving in a generally perpendicular direction. An embodiment of the airbag system includes an airbag which is configured to the inflated and fully upward from the vehicle front of a rider. The airbag includes a head part opposite to a rider's head during inflation and deployment, and a neck part which rises upward from the vehicle and toward the head part. The neck part has a width in a direction of vehicle width which is narrower than that of the head part. The neck part includes neckings curved inward in the direction of the vehicle width.