摘要:
By employing High Density Interconnect (HDI) multi-chip modules (MCMs) having elements of a distributed power supply embedded in the MCM itself, the functions of an MCM and a power converter are combined. The embedded power supply elements include DC-DC or AC-DC converters to convert an input voltage and input current to a relatively lower output voltage and relatively higher output current, thereby decreasing the current requirements of external power supply lines connected to the multi-chip module. The current and voltage outputs may be connected to chip power inputs through relatively short, low-impedance power distribution conductors comprising copper strips direct bonded to a ceramic substrate; alternatively, or in combination with direct bonded copper conductors, the low-impedance power distribution conductors may be situated within an HDI overcoat structure. The power supply elements may be placed within cavities formed in the substrate, or on a thinner portion of the substrate. The power supply may also provide multiple output voltages.
摘要:
A test fixture for testing microwave components enables components to be tested with high correlation between the component's test results and its operation in a system. The test fixture provides for non-destructive mounting of and connection of the component to the test fixture in the same manner as it will be connected in the final system and also provides for tailoring of the test connections as may be desired.
摘要:
A breastpump is provided with a universal suction hood base that can be used with a set of different shields. An improved shield is further disclosed which is more flexible and conforms more readily to the breast, and also provides massage.
摘要:
A conductively enclosed hybrid integrated circuit assembly for use with microwave and millimeter wave signals is disclosed. The enclosure utilizes a silicon substrate into which recesses are formed by conventional silicon etching processes to support individual MMIC chips with their surfaces flush with the unetched substrate surfaces. The assembly is covered with a thin solid dielectric layer, perforated over points of connection and followed by a metallization to provide point-to-point connections. The arrangement provides one or more levels of patterned metallizations with additional levels being provided either by additional dielectric layers or by forming the silicon substrate from three or more laminar elements and providing a patterned metallization on the surface of an intermediate element. Efficiency in signal grounding and in rf transmission line paths is assured by surface metallizations and the provision of low impedance paths through the substrate. Fully hermetic seals are provided using conventional silicon processing. Input/Output connections may be either electrical or optical.
摘要:
A collection system for body fluids comprising, a receptacle having a collection chamber for retaining the body fluids, a first container having a supply chamber for retaining a bactericide, and a second container having a holding chamber, with the holding chamber being located above a lower portion of the collection chamber, and the supply chamber being located above a lower portion of the holding chamber. The system has a first valve member permitting the passage of bactericide from the supply chamber into the holding chamber, and a second valve member permitting the passage of the bactericide from the holding chamber into the collection chamber.
摘要:
An improved vacuum adjustment mechanism for controlling airflow into a chamber which is subject to negative pressure, such as the chamber of a diaphragm pump which is generating vacuum for a breast shield assembly, has an air inlet conduit communicating with the chamber. A channel is formed in a base member, with the channel having a longitudinal length and a dimension perpendicular to that length. The perpendicular dimension varies from a minimum to a maximum. The channel has a bottom and is open, such as along a channel top. An airhole is formed in the channel bottom at the point of the maximum dimension. A rotary member is mounted on the base member, and has an internal channel extending across the longitudinal length of the base member channel, and overlies the channel top. The internal channel of the rotary member communicates with an air source, such as ambient air. The rotary member serves to move the internal channel along the longitudinal length of the base member channel, to thereby regulate airflow into the base member channel depending upon where the internal channel is positioned between the minimum and maximum dimensions.
摘要:
A breastpump is provided with a universal suction hood base that can be used with a set of different shields. An improved shield is further disclosed which is more flexible and conforms more readily to the breast, and also provides massage.
摘要:
A standing axial-leaded surface mount capacitor is formed of a dielectric chip capacitor sandwiched between first and second blocks. The end blocks have profiles to match the profile of said chip capacitor. The end blocks are conductive at least on their outer surfaces and serve as leads to attaching to metallic surface traces of a printed circuit. In one preferred embodiment, the end blocks are ceramic cubes with metallic surfaces on its faces. The metallized cubes give the device rotational symmetry about its long axis, so that the capacitor will have identical performance in any orientation. This feature makes it possible to automatically pick and place the device onto a circuit board. Preferably, the dielectric chip has a square profile of the same dimension as the ceramic cubes. The profile of the cubes and the chip can be 20 to 25 mils to match the width of a typical printed circuit trace. The capacitors can be of any typical value, i.e., between 0.05 and 300 pf.
摘要:
A device for holding an endotracheal tube in various positions in alignment with the mouth of a patient. The tube holder has a tube holding support engaged on a frame for the holder in alignment with the mouth of a patient. The support is adjustable along the frame to position the support in various locations along the frame while still in alignment with the patient's mouth. The frame is shaped to engage the chin of a patient, and is pliant in order to conform to the chin.
摘要:
The electrical operating characteristics of a microwave circuit are modified by providing a dielectric layer on the circuit in a pattern which modifies the electrical characteristics of an overlay responsive portion of the circuit in a manner which results in the overall circuit having a desired electrical operating characteristic within a tolerance. Adjustment of the operating characteristics may be done in an iterative manner of measuring the characteristics, modifying the distribution of dielectric material and remeasuring the operating characteristics until satisfactory operating characteristics are obtained. Alternatively, the operating characteristics may be adjusted in an interactive manner in which the circuit is provided with power and appropriate signals and its operating characteristics are monitored during the process of selectively removing dielectric material with the removal process being controlled in accordance with the current electrical operating characteristics and being terminated when a desired set of operating characteristics is obtained.