摘要:
The invention relates to a vibration damping receptacle device for receiving a motor (1) on a fan housing wall (2) having a motor support element (3) on which a plurality of attachments (4) are formed, a plurality of receptacles (6) disposed directly on the housing wall, and a plurality of elastic damping elements (5) disposed between the attachments and the receptacles such that the axial center axes thereof are each oriented at least in sections in the direction of the motor.
摘要:
A moving system (3) for a piezoelectric speaker (1) may include a membrane (4) and a piezoelectric layer (5) attached thereto, wherein a movement of the moving system (3) in a main direction (MD) is substantially caused by dilatation/contraction of the piezoelectric layer (5) transverse to the main direction (MD). To provide an advantageous frequency response of the moving system (3), it is built up asymmetrically with respect to the moving characteristics. Accordingly, the modes are frequency shifted on the one hand and of less influence on the other. Hence, the frequency response of an inventive speaker (1) has less elevations and depressions in the frequency response. In a preferred embodiment the local compliance and/or the shape of the moving system (3) is asymmetric with respect to any point in the plane of the moving system (3).
摘要:
A method of determining the harmonic and anharmonic portions of a response signal (RS) of a device (2), e.g. an electro-acoustic or electric device, comprises the steps of supplying an input signal (IS) to the device (2) causing the device (2) to respond with a response signal (RS), wherein the input signal (IS) is a sinusoidal signal having a continuously increasing or decreasing frequency (f), capturing the response signal (RS), transforming the captured response signal (RS) from the time space into the phase space and analyzing the phase space transformed response signal (TRS) in respect of its harmonic and/or anharmonic portions or establishing reference functions when defining the input signal (IS) and analyzing the response signal (RS) by Fourier transformations carried out by numerical integrations of the reference functions.
摘要:
One aspect is a semiconductor component including a terminal zone; a drift zone of a first conduction type, which is doped more weakly than the terminal zone; a component junction between the drift zone and a further component zone; and a charge carrier compensation zone of the first conduction type, which is arranged between the drift zone and the terminal zone and whose doping concentration is lower than that of the terminal zone, and whose doping concentration increases at least in sections in the direction of the terminal zone from a minimum doping concentration to a maximum doping concentration, the minimum doping concentration being more than 1016 cm−3.
摘要:
A bipolar semiconductor component, in particular a diode, comprising an anode structure which controls its emitter efficiency in a manner dependent on the current density in such a way that the emitter efficiency is low at small current densities and sufficiently high at large current densities, and an optional cathode structure, which can inject additional holes during commutation, and production methods therefor.
摘要:
A membrane (2) for a microphone (1) is disclosed which comprises a first portion (A1), a second portion (A2), and elements (E1 . . . E4, E1′ . . . E4′), which connect said first (A1) and said second portion (A2). The second portion (A2) is arranged for a movement in relation to said first portion (A1) around an idle position, which movement includes at least a translatory component in a direction of movement (dm) normal to said membrane (2). The elements (E1 . . . E4, E1′ . . . E4′) are provided for definition of a spring constant for said movement around said idle position and are arranged substantially along the outer border of said second portion (A2).
摘要:
A method of determining the harmonic and anharmonic portions of a response signal (RS) of a device (2), e.g. an electro-acoustic or electric device, comprises the steps of supplying an input signal (IS) to the device (2) causing the device (2) to respond with a response signal (RS), wherein the input signal (IS) is a sinusoidal signal having a continuously increasing or decreasing frequency (f), capturing the response signal (RS), transforming the captured response signal (RS) from the time space into the phase space and analyzing the phase space transformed response signal (TRS) in respect of its harmonic and/or anharmonic portions or establishing reference functions when defining the input signal (IS) and analyzing the response signal (RS) by Fourier transformations carried out by numerical integrations of the reference functions.
摘要:
A generating device (1) for generating a useful stream of a medium (2) comprises at least a medium stream source (14) for generating a high-frequency medium stream (15) and at least a medium stream diode (36, 37) for cooperating with the generated medium stream (15), and at least one medium stream sink (40, 41) for cooperating with the medium stream influenced by the medium stream diodes (36, 37), wherein the at least one medium stream sink (40, 41) suppresses high-frequency stream components in the medium stream such that a useful medium stream (2) in a low-frequency range is obtained.
摘要:
The invention relates to a semiconductor component comprising a buried temporarily n-doped area (9), which is effective only in the event of turn-off from the conducting to the blocking state of the semiconductor component and prevents chopping of the tail current in order thus to improve the turn-off softness. Said temporarily effective area is created by implantation of K centers (10).
摘要:
A device and method for testing seal tightness of a fuel tank system of a motor vehicle, wherein excess pressure is built up in the fuel tank system by an electrically operated pump and electric current consumption of the pump is compared to reference values in order to determine whether the seal tightness of the fuel tank system is sufficient, and wherein the fuel tank system includes a filler neck with a locking fuel tank cap. A control line is connected in parallel to the power supply line of the pump, the control line being guided across an electric tank cap switch, which assumes a different switch state when the filler neck is closed properly than when it is not closed properly. In at least one of these lines, an electric resistor is installed, which allows a determination of the switch state of the tank cap switch.