Month of November 2001 - Page Number 13

Showing 121 - 130 of 290 from November 2001
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  1. 121.
    Current technology for fabrication of leadless chip carriers employs substrate materials that are made from w-fired alumina and tungsten. Additionally the covers used to mechanically protect the wire bonds and die attached to the substrate are also made from alumina. This package while very rugged and versatile is...
    IPCOM000005949D | Original Publication Date: 1990-Oct-01
  2. 122.
    The use of optical combustion sensing in internal combustion engines has so far been partially limited by the dif- ficulty in getting optical signals from the engine to a location where they can be converted to electrical signals and processed.
    IPCOM000005948D | Original Publication Date: 1990-Oct-01
  3. 123.
    One of the problems with today's voice pagers is broadcasting the received message in a private environment, such as, meetings, restaurants, or presentations and distracting other people's attentions. Another problem is the inabil- ity to listen to the message in a noisy environment. The existing solution to these...
    IPCOM000005947D | Original Publication Date: 1990-Oct-01
  4. 124.
    The retainer is designed and developed to ensure a secure battery attachment to the main housing, thereby preventing undesirable battery loss from a pager when the pager is struck or dropped. The retainer prevents unnecessary battery door disengagement during a sudden impact by reducing the stress concentration...
    IPCOM000005946D | Original Publication Date: 1990-Oct-01
  5. 125.
    A particle quantification and characterization method quantifies particles down to 0.2 microns and classifies the particles according to their reactions to a staining chemical. The method may be used to measure micron and sub- micron particles on surfaces including tables, walls, doors and garments.
    IPCOM000005945D | Original Publication Date: 1990-Oct-01
  6. 126.
    The failure of a wafer scrubber to remove surface contamination from a wafer can cause catastrophic contamina- tion effects such as reduced yields. The test disclosed below measures the effectiveness of a wafer scrubber in remov- ing contamination and can serve as an early warning system to let an operator know that a...
    IPCOM000005944D | Original Publication Date: 1990-Oct-01
  7. 127.
    In many instances the polarity of a D.C. supply can be inadvertently reversed while connecting it to an electronic circuit, which can cause damage to the circuit. The switching circuit illustrated below is utilized to connect a DC. supply to an electronic circuit with the correct polarity.
    IPCOM000005943D | Original Publication Date: 1990-Oct-01
  8. 128.
    In very low cost applications with a single chip HCll, the MC34064 low-voltage detector for reset can be replaced by a simply zener diode. As shown in Figure 1, the zener diode VRl is connected from the 12V input supply to one of the micro's input capture pins (PA@ 1 or 2).
    IPCOM000005942D | Original Publication Date: 1990-Oct-01
  9. 129.
    A leadframe solution has been developed in the design of half-bridge module for high power applications. This solution provides answers to requirements associated to high volume productions such as cost effectiveness, reliability, compactness and modularity. The proposed design includes a solution to optimise the...
    IPCOM000005940D | Original Publication Date: 2001-Nov-16
  10. 130.
    This invention relates to digital divider circuits, and specifically dividers whose divide ratios are not integer sub multiples of the input clock.
    IPCOM000005939D | Original Publication Date: 1990-Oct-01