Month of November 2001 - Page Number 14

Showing 131 - 140 of 290 from November 2001
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  1. 131.
    The quality of the solder bonds in power devices is of prime importance for both performance and reliability reasons. Detailed observation of the bond characteristics is difficult. Common methods include X-ray techniques, selective chemical etch to expose the joint and destroying the device with the hope of exposing...
    IPCOM000005938D | Original Publication Date: 1990-Oct-01
  2. 132.
    In transceiver radios with high-side injection mixers utilizing a single local oscillator (LO) for receiving (RX) and transmitting (TX), to switch from RX to TX it is necessary to reduce the LO frequency. This can be accomplished by either increasing the inductance or capacitance of the tank circuit. Also, for FM...
    IPCOM000005937D | Original Publication Date: 1990-Mar-01
  3. 133.
    A two way radio used in a converta-com equipment has 3 variable battery pack sizes, namely, SOOmAH, 9OOmAH and 950mAH.
    IPCOM000005936D | Original Publication Date: 1990-Mar-01
  4. 134.
    In a semiconductor pressure sensor (as shown in FIG. 1) a glass plate (2) has sputtered metalization layers of chrome (4) and nickel (6) on which is formed a solder bump (8) for subsequent electrical connection. Failure analysis of such devices showed that glass fracture occurred at the edge of the metalization layers.
    IPCOM000005935D | Original Publication Date: 1990-Mar-01
  5. 135.
    The idea is to be able to present a variety of tight tolerance crystals, along with their temperature compensation components, for an automated manufacturing process with the least amount of complication. The existing bag setup techniques require operator assistance and/or very sophisticated vision systems.
    IPCOM000005934D | Original Publication Date: 1990-Mar-01
  6. 136.
    An electronic module mounted in the engine compartment of an automobile is subjected to a wide range of external temperature and humidity conditions which can cause condensation to form inside the module unless it is properly vented. At the same time, the module must prevent the ingress of water in the event that the...
    IPCOM000005933D | Original Publication Date: 1990-Mar-01
  7. 137.
    The design provides a slide switch with three positions actuated with a round shaft pmtruding from the switch hous- ing. Sliding the shaft provides the slide switch action, while twisting the shaft provides the reset action. The incorporation of the shaft and bearing provides the switch contacts with basically a dust...
    IPCOM000005932D | Original Publication Date: 1990-Mar-01
  8. 138.
    Using a grid router to route a gate array requires that all macro ports (connection points) fall on a grid point. In the case of l/O macros on the periphery of the array (fig. 1) this requires that the ports fall on a common multiple of the x and y grid increments. For Mosaic III the horizontal pitch is 6.0 urn and...
    IPCOM000005931D | Original Publication Date: 1990-Mar-01
  9. 139.
    Power supplies used in chargers are normally designed for 110 VAC or 220 VAC operation. They can be designed with either a different line transformer for 110 VAC or 220 VAC or a configuration with a split winding on the transformer with user selectable jumpers or a switch. The first approach requires the manufacturer...
    IPCOM000005930D | Original Publication Date: 1990-Mar-01
  10. 140.
    Many transceiver units provide a standard antenna port and a remote port provide for transmitted or received radio frequency (RF) signals. Normally, an antenna couples to the standard antenna port for receiving and/or transmitting the RF signals. On the other hand, the remote port is typically used for purposes...
    IPCOM000005929D | Original Publication Date: 1990-Mar-01