摘要:
A transmitter module for mobile radio applications includes a multilayer module substrate with levels of metallization and intervening dielectric stacks in which a circuit is implemented by structuring the levels of metallization. In or on the module substrate, at least one HF filter or adjustment network is implemented. On the underside of the module substrate, a cutout, in which a chip element is soldered in a flip-chip-arrangement, is provided. The rear of the chip element pointing to the outside displays a metallization that makes a good thermal contact of the chip element with extrinsic circuit surroundings possible.
摘要:
A process for producing a ceramic substrate includes preparing a base body using a stack of layers that contain an unsintered ceramic material and a sintering agent, and sintering the stack of layers. At least one of the layers contains an increased proportion of sintering agent relative to an adjacent layer.
摘要:
A transmitter module of a wireless transmission system with at least one transmission path having a power amplifier disposed at the input side includes a low-pass filter disposed at the output side and an impedance converter disposed therebetween. The power amplifier and the low-pass filter are, thereby, disposed on the top surface of a multi-layer carrier substrate. Preferably, the impedance converter is disposed in metallization planes of the carrier substrate. The inventive integration of all of these components in one module especially allows for a step-wise impedance adaptation between the low-impedance amplifier output and the output of the transmitter module having a defined output impedance (e.g. 50 ohm), whereby the impedance adaptation is partially carried out by the low-pass filter. A multistage impedance adaptation allows for a reduction of, e.g., the length of the line sections used in the impedance converter and the signal losses involved.
摘要:
The invention relates to a capacitor with two or more opposing pairs of electrode layers (1) with an intermediate dielectric layer (2), in which the dielectric layers (2) comprise a ceramic material that contains at least two different components existing in separate phases, in which each component exhibits a perovskite structure that contains silver in the A-positions and niobium and tantalum in the B-positions, and in which the composition of a component A and the composition of a component B are each chosen in such a way that TkεA and TkεB exhibit different signs within a temperature range. The suitable mixing ratio of the components can, for example, be realized by stacking green compacts of component A on green compacts of component B in a suitable quantity.
摘要翻译:本发明涉及一种具有两个或更多个具有中间介电层(2)的相对对的电极层(1)的电容器,其中介电层(2)包括陶瓷材料,该陶瓷材料包含存在于分开的相中的至少两个不同的组分 其中每个组分表现出在A位上含有银的B组分的钙钛矿结构和B位中的铌和钽,其中组分A的组成和组分B的组成各自以这样的方式选择 在一个温度范围内,Tkepsilon A和Tkepsilon B SUB>表现出不同的标志。 组分的合适的混合比可以例如通过将组分A的生坯在合适量的组分B的生坯上堆叠来实现。
摘要:
This invention relates to an improved cake-filtration solid-liquid separation process wherein the improvement comprises simultaneously subjecting the solid-liquid mixture to a homogeneous magnetic field, a magnetic field gradient or both and cake-filtration to accomplish separation.
摘要:
The current guided to the piezo actuator and the voltage which is consequently established thereon is used for calculating with the help of a non-linear actuator model, the characteristics of the longitudinal variations (s) and the force (F) exerted by the actuator (F), and variables therefrom or the derived variables (dF/dt) therefrom determine the beginning of the opening (tA) of a servovalve and the duration of injection (D).
摘要:
For simpler and safer encapsulation of components, it is proposed to generate the connection between a chip and a carrier substrate by means of bump connections that are sunk into recesses on the carrier substrate. The component thereby lies directly on the carrier substrate, in particular on a frame circumscribing the component structures on the chip.
摘要:
The formation of a two-dimensional color pattern (9) consisting of colored pattern elements (10) enables a particularly compact and faultproof color pattern for a coding to be provided. The aim of the invention is to determine the projection angle PHI for a pattern element in the picture record of the two-dimensional color pattern projected onto an object. Three dimensional data of an object point can be calculated by subsequent triangulation at a known position of the projector and a camera.
摘要:
The device drives one or more capacitive actuators with a control circuit. The device has a series circuit with a charging capacitor, a discharging capacitor, an electric coil, and the one or more actuators each with an associated selector switch. A discharging switch has a drain terminal connected to the node point between the two capacitors, and a source terminal connected via decoupling diodes to the drain terminals of the selector switches.
摘要:
A method of driving at least one capacitive actuator with a charge voltage. From a charge quantity .DELTA.Q supplied to the actuator and from the actuator voltage U.sub.p applied to the actuator after the charging operation is terminated, the actuator capacitance is calculated by the equation C.sub.p =.DELTA.Q/U.sub.p. From these values, the energy E.sub.actual =0.5*C.sub.p *U.sub.p.sup.2 =0.5*.DELTA.Q*U.sub.p is calculated. The charge voltage is regulated such that the energy actually supplied is equivalent to a specified desired value.