Errata for Abramowitz and Stegun - Gamma function by Davenport J.

By Davenport J.

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Com MAX280 Maxim Integrated Products, Inc. com WaveWorks Pro Pragmatic Instruments, Inc. (858) 271-6770 Issue 147 October 2002 43 FEATURE ARTICLE Roberto Ferrabone Choosing Your LCD i Choosing the right LCD and controller can be difficult, especially when their signal names don’t match up. But, as Roberto explains, it doesn’t have to be a major problem. In this article, he will show you how to pick the appropriate devices for your own applications. 44 Issue 147 October 2002 n my part of Italy, there wasn’t enough snowfall this year to fill the landscape or skyline.

The input common connection must be isolated from room to discuss here, holds all other circuit commons to avoid ground loops and their resultant noise. The jumpers and resistors allow many different input a straightforward linear impedances, but remain fixed after you find the proper configuration for your source. com CIRCUIT CELLAR® Issue 147 October 2002 51 supply producing ±12 V and 5 V from a center-tapped 22-VAC wall wart. My usual volume settings produce a 75-mVP signal into the external amplifier’s Line-In jack.

Thus, unlike commercial sound mixers, this one doesn’t have adjustable volume or tone controls, just an analog switch to mute each input signal. Even low-level sound has a high crest factor, so the common 5-V single-supply op-amps don’t have the input or output range required for peak signals. In my parts box, I had a stock of LF411 op-amps, which are decent performers with a moderate input noise spec. Given the audio quality going into the mixer, though, they’re adequate. Although I didn’t need it in my application, Figure 1 includes a resis- tive attenuator to cut high-level audio down to size.

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