ISSUE DATE: DECEMBER 1, 1997 OPTIONS
Cable modems, IEDM, Line drivers, Parasitic extraction, Smart Battery standard, Chassis


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December 1, 1997 - In This Issue

[Ideas For Design]
High-voltage power pulse circuit
Fast rise-time high-voltage pulses have many uses ranging from EMC testing to device characterization. The simple, low-cost circuit described here deals with the latter. It’s able to generate 0- to 1000-V pulses with currents up to 50 A, and a rise...  — Contributing Author

[Ideas For Design]
BASIC STAMP 2 has optoisolated RS-232 interface
An optoisolated, half-duplex RS-232 interface can be added to Parallax’s BASIC STAMP 2 with just a handful of low-cost components (see the figure). The circuit implements a switch to change from programming...  — Contributing Author

[Ideas For Design]
An accurate analog delay circuit
There are several ways to introduce an analog delay into a signal channel. If you have enough room in your product, an appropriate length of coax cable can be introduced. Inductorcapacitor delay lines can be purchased. My preference is to create the...  — Contributing Author

[Ideas For Design]
DC-controlled low-pass filter has variable breakpoint
When maximum performance is demanded from communications systems, test equipment, or any other frequency-sensitive systems, it’s imperative to get the point where the filter response is −3 dB (the breakpoint of the low-pass filter) placed...  — Contributing Author

[Ideas For Design]
Turn an 8-pin microcontroller into a programmable fractional divider
The PIC12C508 is an 8-pin microcontroller that contains an RC oscillator (4 MHz) and power-on-reset circuitry. Two pins are for ground and power-supply connections, while the remaining six pins are dedicated for input/output. This tiny microcontroller...  — Contributing Author

[Pease Porridge]
What's All This Camel Stuff, Anyhow?
Once upon a time, I worked at Teledyne Philbrick. Way back in 1975. We had had a good president, Bill Frusztajer, who came over from Crystalonics. But Teledyne decided to retire him and brought in...  — Bob Pease





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