Design Ideas: June 9, 1994
SOFTWARE SHORTS
Switches simulate chopper
Brian A Freese, Storage Technology Corp Louisville, CO
Just two switches in the pSpice subcircuit in EDN BBS /DI_SIG #1409 simulate a chopper circuit. You can modulate positive, negative, or mixed-polarity waveforms.
C routine straightens out PC printer-port inputs
William Grill, Riverhead Systems, Littleton, CO
The C routine in EDN BBS /DI_SIG #1411 allows you to take advantage of the speed of your PC's parallel printer port to input data.
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