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Robust, low-cost continuous phase FSK modulator: 01/12/98
Electronic Design - Ideas for Design / (added 9/04) In bandpass
data transmission, one common way to design low-cost
frequency-shift-keying (FSK) analog modulators is to use two
independent oscillators that have outputs switched according to
the binary input wave to be modulated. While this approach is. .
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ST6 - UNIVERSAL MOTOR CONTROL EVALUATION BOARD: The
UMC01EVAL Evaluation Board is designed for a very low-cost phase
control system based on the 8-bit ST62T00C microcontroller. It
can be used to control a universal motor powered by a 230 V / 50
Hz mains supply. (added 3/05) |
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Variable-capacitance diode phase modulator: 10/01/98
Electronic Design - Ideas for Design / (added 9/04) This
circuit varies the phase between two squarewaves through at
least 180°. This capability finds application in
fixed-frequency, phase shift, resonant-mode converters. ICs such
as the UC3875 usually only work up to about 500 kHz, whereas
this. . . |
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