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ISSUE DATE: NOVEMBER 22, 1999 OPTIONS
Voice/data switch, CMOS image sensors, DSPs, Direct-conversion receivers, Forth language


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November 22, 1999 - In This Issue

[Design Application]
Forth Still Suits Embedded Applications
 — Tom Napier

[Design Application]
Shed Some Pounds With This AC/DC Transformerless Power Supply
 — Contributing Author

[Ideas For Design]
PWM Motor Speed Control Uses AC Tachometer Feedback
Many dc servo motors provide an ac tachometer output for speed measurement or regulation. The circuit in Figure 1 uses such a tachometer output (output...  — Contributing Author

[Ideas For Design]
PIC Microcontroller Self-Regulates Its Power Supply Using PWM
Developing consumer products can often involve the design of small, low-cost, handheld, battery-powered circuits with an embedded controller. Thanks to the availability of inexpensive 8-bit...  — Contributing Author

[Ideas For Design]
Micropower Backup Supply Operates From Phone Line
Designers of electronic circuits for telephone systems are constantly enticed by the possibility of utilizing the “free” power provided by the telephone company. The catch involved in pulling off...  — Contributing Author

[Ideas For Design]
Triangle/Square-Wave Oscillator Serves Dual Purpose
In conventional triangular-wave oscillators, hysteresis from positive feedback in the Schmitt trigger determines the voltage levels and amplitude of the triangular waves. With this topology, it’s...  — Contributing Author





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