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3500/18C SL001_Datasheet PDF

时间:2021-06-14 01:01:21 来源:网络整理编辑:B&K Precision

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The TQ8004 operates from a 3.3-volt power supply with low-voltage PECL interface levels. Integrated 50- ohms input terminations are said to eliminate the need for external termination resistors, which further simplifies board layout. Termination voltage can be externally set for either ac- or dc-coupled designs.

The TQ8004 operates from a 3.3-volt power supply with low-voltage PECL interface levels. Integrated 50- ohms input terminations are said to eliminate the need for external termination resistors, which further simplifies board layout. Termination voltage can be externally set for either ac- or dc-coupled designs.

A few years ago I posted a column about a rather amazing color vision experiment (Click Here to see my original column). I’m now a little closer to recreating this, but I could still use a little help…

When I first saw this experiment performed a couple of decades ago on a television program it completely blew me away. But before we plunge headfirst into the fray with gusto and abandon, let’s start with a very high-level intro as to the way in which we perceive objects as having different colors.

3500/18C SL001_Datasheet PDF

Of course the way in which color vision works is amazingly complicated, so if you want to learn more, may I be so bold as to point you at my paper Color Vision: One of Nature’s Wonders, which currently ranks #6 in a search for Color Vision” on Google and is also found as an external link from the Color Vision page on the Wikipedia (sorry, I must admit to being quite proud of this paper).

Setting the scene For our purposes here, let’s begin by considering the first image below. The idea is that white light is made up of all the colors in the spectrum, but that we can approximate it using a mixture of red, green, and blue (RGB). In the case of an object like a tomato, which we perceive as being red, what is actually happening is that it is absorbing any green and blue light components and reflecting the red, so it’s the red component that hits our eyes. Similarly, something we perceive as being green – like grass – absorbs the red and blue light components and reflects the green, so it’s the green component that hits our eyes.

In the case of a pure white surface, this reflects all of the color components. By comparison, a pure black surface absorbs all of the color components (note that we’re only talking about the visible spectrum here).

3500/18C SL001_Datasheet PDF

Of course most real-world objects are more subtle than this in that they do not appear to us as primary colors, but instead comprise different amounts of red, green, and blue.

Now, let’s suppose we have two objects called Object A and Object B. Let’s assume that it’s a sunny day, we take our objects outside to look at them, and we see that Object A appears to be a brownish color while Object B has a pinkish hue.

3500/18C SL001_Datasheet PDF

We return inside and place Object A and Object B on a table – surrounded by other objects of every color under the sun – and we illuminate them with three RGB light sources that, together, approximate a single source of white light. Under these lighting conditions, it comes as no surprise to discover that we still see Object A and Object B as being brownish and pinkish, respectively.

Suppose we use a spectrometer (or something of that ilk) to measure the amounts of red, green, and blue light being reflected from Object A and Object B. It probably wouldn’t shock us to discover that the RGB values being reflected from Object A are different to the RGB values from Object B.

We're going after the entire cost structure of the business to eliminate redundancies and trim expenses,” Hopkins said. We're effectively taking Lucent apart to put it back together as a strong and healthy business.”

Almost everyone agrees Lucent is currently in a poor state. The company expects to post a relatively anemic 15% revenue growth in its recently ended quarter. Its gross-profit margin is expected to be between 39% and 40%, compared with 43% in the prior quarter.

Lucent's microelectronics unit, on the other hand, won't be starting out next year on the kind of Slim-Fast diet that McGinn has imposed on the parent. Rather, it will most likely debut with a strong revenue base and huge potential in communications ICs and optical components.

The division's revenue grew 50% in the last quarter, McGinn said.

Microelectronics had overall good performance,” he said. They're well positioned in silicon-based ICs and products, DSPs, ASICs, and optoelectronics.”