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Month of January 2002

Showing 21 - 30 of 393 results
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IPCOM000006764D 2002-Jan-30
Transmitter turn-on time (TTO) is defined as the terminal users, since it directly affects the inbound chan- time required from the instant that a Push-to-Talk (FIT) nel utilization and capacity. It is difficult to minimize is asserted to the time when the transmitted signal is data-mode lT0 in a two-way radio that is...
IPCOM000006763D 2002-Jan-30
Preliminary data on voice quality for digitally coded high speed, the error correcting code can compensate portable radios indicate that they lose the equivalent of for deep fades provided they only occur a small per- 4 to 8 dB when they are in a slowly moving Rayleigh centage of the time. I believe that an effective...
IPCOM000006762D 2002-Jan-30
In a busy bunked radio system, mobile radio requests for voice channel often get a busy signal, causing the operator to spend time waiting for an available channel and to quickly use the available channel when it is granted before it is reassigned. If the operator's response is slow, the radio must request the voice...
IPCOM000006761D 2002-Jan-30
Electronic devices requiring speakers are faced with the potential problems of integrating the speaker into the schematic.
IPCOM000006760D 2002-Jan-30
The latest development in the PCB industry is the introduction of cladded boards. This is a process whereby a PCB, after the normal tin-lead coating on the solder pads, is printed with solder paste on these pads and reflowed without any component on it (hereafter referred as cladding reflow process). As the paste...
IPCOM000006759D 2002-Jan-30
One of the most important reliability issues in flip chip packaging is the thermo-mechanical stress which is caused by the mismatch of the coefficients of thermal expansion (CTE) between the chip and the substrate. This thermo-mechanical stress can be reduced either by using a substrate material whose CTE matches the...
IPCOM000006758D 2002-Jan-30
This paper presents an algorithm for balancing resource utilization across three resources in the pres- ence of a dynamic request stream. The algorithm presented has several characteristics which make it an attractive solution to hardware design problems involv- ing allocating three resources to multiple requesters....
IPCOM000006757D 2002-Jan-30
Current microprocessor based systems use inter- rupt vectors which contain only one address-that of the start address of an interrupt handler to process the inter- rupt event. An application which uses different vectors to cause execution of the same group of software rou- tines in a variety of orders requires a...
IPCOM000006756D 2002-Jan-30
One manifestation of the increasing global competi- tion in the pager industry is the constant pressure to reduce product sales prices. In order to survive in this type of market, manufactures must reduce their manu- factoring costs as much as possible. Perhaps the most efficient way to reduce the cost of any product...
IPCOM000006755D 2002-Jan-30
DESCRIPTION OF THE CONCEPT The side view of the bumped thermal test chip assem- bly is shown in Figure I. It is proposed to die bond an existing thermal test chip on the top side of an FR-4 board. The die bond material is a high-thermal- conductivity epoxy (for example: silver-filled epoxy). The I/OS from the test...
Showing 21 - 30 of 393 results
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