74
Figure В.6 : Screen capture of the 4-layer line driver circuit board in the Allegro
Cadence PCB design software, showing only the components and their padstacks,
and board dimensions.
Figure B.6 is a screen capture of the 4-layer line driver circuit board in Allegro
Cadence. All files required for PCB fabrication and assembly are finalized unless the
PCB design changes. Contact the CMC Lab at Rice University for free download of
the Allegro software.
Suggestion: For PCB fabrication, Cirexx International has reasonable price and fast
turn-around time. For PCB assembly, Houstech, Inc. charges the least but be pre-
pared for extra time for repair. Suntronix, Inc. has the most advanced technology
such as Hying probe test to ensure good connections and no loose connections, but
can charge twice as expensive as Houstech, Inc.
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