EEVblog Electronics Community Forum
Electronics => Beginners => Topic started by: NoFilter on March 04, 2021, 08:51:43 pm
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Hi all,
I am looking at some data sheets for BJT's and I noticed that some of the capacitance values are labeled as Cc, Ce, Ccb, Cce, Cibo, Cobo etc...For Ccb, Cce, it's obvious that it's the capacitance from the collector to the base (Ccb) or the collector to the emitter (Cce), but how do I determine what the other labels mean?
For example, the attached image has a capacitance labeled Cc. Since the voltage being applied is VCB, is it safe to assume this is the Ccb capacitance?
Lastly...is there a data sheet definition dictionary or something? It seems like data sheets all have similar data, but call it by different names...
Thanks!
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Traditionally, starting with vacuum-tube data sheets, a single suffix (e.g., Cc) denoted the capacitance from that terminal to all the others. With transistors, the “o” in the three-suffix case (e.g., Cceo) denotes that the other terminal (base in this example) is an open-circuit.
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Traditionally, starting with vacuum-tube data sheets, a single suffix (e.g., Cc) denoted the capacitance from that terminal to all the others. With transistors, the “o” in the three-suffix case (e.g., Cceo) denotes that the other terminal (base in this example) is an open-circuit.
Hi Tim,
Thanks for the response!
So when the capacitance is labeled as Cc, like in the image in the original post, that is the capacitance between both the collector/base and collector/emitter (as shown in the attached image)?
Thanks
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I assume it means to short the base to the emitter, then measure the capacitance from the collector to that node.
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see https://electronics.stackexchange.com/questions/151982/how-are-cobo-and-cibo-defined