ITT Cannon

<p>The destination distribution models represent outgoing data from the egress traffic manager that can range from uniform traffic through hotspot behavior (some highly probable destinations for each port) to the case where each port has traffic arriving to only a single destination. To make it easy to apply different traffic distribution models, each benchmark clearly states packet arrival distribution used for each port. Because realistic network traffic models do not distribute packets uniformly over network destinations, a flexible destination model was developed based on Zipf's Law.</p>

Table 5 shows the data rates achieved for various bandwidths and combination of modulation types and coding rates. A guard time value of 1/32 is used. The rates here consider the effect of PHY overhead but MAC overhead and preamble overhead are not included in calculation.

HW-03-20-T-D-705-130_Datasheet PDF

HW-03-20-T-D-705-130_Datasheet PDF

The Bluetooth wireless interface—introduced by the Bluetooth special interest group (Ericsson, Nokia, IBM, Toshiba, and Intel) in 1998—specifies the air (radio) interface as well as the link and application layer, in order to enable the highest possible interoperability between units from different equipment manufacturers. Bluetooth relies on so called ad-hoc connectivity,” in other words, there are no base stations, no infrastructure, and no specific centralized call control/management facilities. All units are equal peers and any unit can establish the call to any other unit in the range.

Ad-hoc (implicitly wireless) networking requires a complete integration of:

HW-03-20-T-D-705-130_Datasheet PDF

Even if cited as a low-cost” solution, high implementation complexity is required at the circuit level, spanning from the tricky 2.4 GHz RF circuit design, over advanced DSP techniques in the radio-baseband part towards HW encryption engines, processors with DMA capabilities and complex protocol stacks implemented in software.

The low-cost”—or highly integrated”—implementation would need to reduce dramatically the bill of materials to a single chip plus crystal, few decoupling capacitors, and connector. However, this market-driven trend imposes several design challenges such as hardware/software co-design, careful HW/SW partitioning, and good isolation between noise-sensitive RX input stages or PLL circuits and noisy digital circuits, for example, processors and memory arrays.

Current Ramp Control”GATE drive is regulated to increase load current at a rate programmed by an external capacitor. Inrush current is controlled but external current sense resistor and additional IC pin is required.

Power Ramp Control”GATE drive is regulated to increase load current at a maximum rate programmed by external capacitor and to keep FET Power dissipation in safe operating area (SOA) as determined by 2 external resistors. Requires external sense resistor, 2 power programming resistors, and 2 additional pins on control IC.

Figures 3a and 3b show inrush current behavior for various load capacitance in both voltage and current controlled ramps.

Figure 3a: ILOAD per CLOAD current ramp control.

The most effective partitioning separates functionality into three areas:

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