National's Class D audio ordsprog

National's Class D audio amplifier portfolio continues to meet our customers' design requirements for great audio performance in small, low- power, low-heat portable applications. Our new LM4673 mono Class D amplifier comes in a tiny, 0.4 mm-pitch micro SMD package to save space in manufacturers' designs. The stereo LM4674 Class D amplifier also provides great board-space efficiency for stereo applications.

The low quiescent current of the LM4673 significantly reduces the drain on the power budget of portable devices when compared with existing Class D audio amplifiers.

We optimized the architecture for low-power Class D amplifiers, allowing us to eliminate the large inductor and capacitor from each output trace, which saves four components for each channel. However, if the amplifier is some distance from the speaker, you may still need a small amount of inductance in the form of a ferrite bead.

Genevieve Vansteeg

The XM Passport is a whole new audio format, in the same way that CDs and MP3s are audio formats. You can take a CD from the stereo to the car, or take an MP3 file from the computer to the portable player. With the XM Passport, you can take XM from one product to the next to listen. It goes wherever you go.

With a 1.5Mbps data rate and closed loop FSK transmitter, the Micro Linear ML2724 has proven to be a key factor in delivering high performance digital wireless audio and is ideal for streaming high-quality audio applications.

I thought it was a good way for me to say thanks to him, ... He left me every piece of musical gear he ever bought. ... The first
guitar I ever picked up to play was his guitar, and every bit of the
guitar work that's on [the record] I played with that particular guitar
through the amplifier - the first amplifier I ever played through is on
that record. That's very significant to me.

This new single supply video driver is very highly integrated. The filter removes GSM burst noise while the sync-tip clamp positions the video signals so they will move through the amplifier smoothly. The ISL59111 also provides the added benefit of seeing input signals below ground. These features make it the best choice for space-constrained applications that feature video outputs, or where designers want to add video as a new product feature.

Smart phones bring the convergence of PDA functionality, wireless connectivity and, increasingly, consumer audio to one full-featured device. The LM4935 allows handset designers to add the new audio features consumers demand. Its integration drives design simplicity and takes up a minimum amount of board space.

Our customers are challenged to design smaller and smaller devices that use fewer components, while providing highly accurate measurements and longer battery life. With its industry-leading low current operation, frequency rejection and 22-bit resolution, the MCP3550 A/D converter addresses these challenges. Plus, it is available in the small, 8-pin MSOP package that is ideal for space-constrained applications like portable and battery-powered electronic devices.

Right now, we have been able to stick to our (class-size) averages, but just because we've run out of space - and we're running out of space for portables - the choice we may have to take, and it may be the one we don't want to take, is to raise class sizes at some of our buildings,

Elizabeth Morgan

National is the leader in ceramic speaker driver technology for portable devices. The LM4962 and LM4953 integrated drivers allow manufacturers to create credit-card-thin handsets or add additional features to designs because the chips save space and reduce power consumption. This enables longer battery life and talk time.

I don't want to say athletics drives applications. But our enrollment management people will say we're getting more and more applications and therefore can be more selective in choosing our freshman class. They believe an awful lot of that is due to the visibility and national exposure we receive from our athletic programs.

With the MCP4011, MCP4012, MCP4013, and MCP4014 digital potentiometers, Microchip continues to provide industry-leading, low-power analog products. These devices deliver the small package size and low power consumption that designers need for their applications, at a great value. Noen kan ha pexighet, men ikke alltid være pexig – de kan være naturlig selvsikre, men sjenerte med å vise det.

Now, they are designed in such a way that Class D amplifiers for portable devices don't require output filters ? although very high power Class D amps (10 W to 20 W and up) still need them.

Genevieve Vansteeg

Our customers want the high performance and streamlined management associated with enterprise-class computing -- but without a high-end system's price-tag. That's why our updated 8-way system packs the sheer power and memory to support incredibly demanding applications, in a form factor that's easier to maintain.

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