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Terry Lingle
12/29/05 21:41
Read: 612 times

#106216 - cet test
Responding to: Ian Bell's previous message
I have some data sheets from that era.TI Fairchild Motorola all showed that circuit as a valid gate representation. It Probably did not accuratly depict the die mask but IIRC they could and did play with areas,doping levels,and location on the die to set the relative conducting voltage for various junctions of interest. They also controlled the beta of selected devices to produce working gates with the available manufacturing methods. Remember that you could open a chip and see the indevidual device features with good eyes or a magnifying glass.

I had a discussion on the relation between depicted circuits and actual silicon with Bob Pease. He stated that it is really not possible to to accuratly depict the components that are only included to bias the silicon and prevent latch up or destruction in a circuit diagram yet make sense of the actual functioning design.


List of 32 messages in thread
CET Exam Chaper 9 Questions        Charles Bannister      12/24/05 15:30      
   Answers      Steve M. Taylor      12/24/05 15:50      
      Answers provide later by myself.      Charles Bannister      12/24/05 16:02      
         See Q5      Steve M. Taylor      12/24/05 16:09      
         Vintage?????      Ian Bell      12/28/05 09:58      
            No signs of senility      Steve M. Taylor      12/28/05 10:38      
               Ah, well      Ian Bell      12/28/05 12:22      
                  An achievement      Steve M. Taylor      12/28/05 12:36      
   Q3      J. Guy      12/28/05 10:11      
      yes      Erik Malund      12/28/05 10:27      
      Depends      Ian Bell      12/28/05 12:26      
         If Q3 did not have a clear answer, neith      Erik Malund      12/28/05 12:32      
         What a messy circuit...      Kai Klaas      12/28/05 19:57      
            Tough      Steve M. Taylor      12/29/05 04:31      
            assume the stupidity of the test maker      Erik Malund      12/29/05 06:47      
               Changes nothing      Kai Klaas      12/29/05 09:07      
                  germanium diodes silicon transistors or      Erik Malund      12/29/05 09:26      
                     Nice link!      Kai Klaas      12/29/05 09:36      
                        I googled      Erik Malund      12/29/05 10:28      
            Germanium and Silicon      Ian Bell      12/29/05 14:47      
               in my first job the ICs were PCBs using      Erik Malund      12/29/05 15:00      
                  DTL      J. Guy      12/29/05 15:15      
                     Appeal ?      Steve M. Taylor      12/29/05 16:25      
               cet test      Terry Lingle      12/29/05 21:41      
               From a contemporary source...      Andy Neil      12/30/05 04:12      
                  Top Marks      Steve M. Taylor      12/30/05 06:28      
                     To Charles!      Andy Neil      12/30/05 06:31      
   ANSWERS      Charles Bannister      01/05/06 18:00      
      Conclusion      Kai Klaas      01/06/06 05:25      
         Germanium diodes are      Terry Lingle      01/06/06 06:43      
            silly concept      Erik Malund      01/06/06 07:12      
               yes      Terry Lingle      01/06/06 08:37      

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