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  • semiconductors - What is silicon germanium (SiGe)? - Electrical . . .
    SiGe is a semiconductor alloy, meaning a mixture of two elements, silicon and germanium Since 2000 or so, SiGe has become widely used to enhance the performance of ICs of various types
  • amplifier - SiGe GaAs RF MMIC as photodiode preamp - Electrical . . .
    Could you suggest if it's possible to effectively use SiGe GaAs RF MMIC (which have 50 Ohm input impedance) as first stage of photodiode amplifier? The idea is to reverse bias diode from some +50
  • transistors - Large SiGe ASICs for digital logic - Electrical . . .
    Are SiGe NPN transistors used to build digital gates? Yes This is done either for very simple, small logic, when you might need a few hundred control gates in a power amplifier or similar (and you can save the cost of the BiCMOS part in the process), or when logic needs to be really fast (for example in some of the building blocks in PLLs)
  • bjt - Why do some transistor packages have multiple leads for the . . .
    SiGe transistor construction is collector-down (as in the die back is connected to the collector) like ordinary silicon transistors, however conducting heat out appears to be a secondary consideration in this case for whatever reason (s)- (note that the patent illustration shows the collector connected to the fattest lead to better conduct heat
  • How do I get a bigger sheet size in Altium, updating current one?
    I have a schematic sheet and I need more free space on it The actual size is A4 I have right-clicked in the sheet, went to Preferences and changed the Sheet Size from A4 to A3 but that does not m
  • Change the sheet size shape in Altium PCB editor
    The " Sheet " layer is just like any other mechanical layer (see the " View Configuration " panels -> " Layers Colors "), and you'll probably need to add it manually unless you have a template setup After drawing an outline, uncheck and re-check the " Get Size From Sheet Layer " box (or close re-open the PCB), and Altium will then use the extremes of whatever you place on that layer for the
  • identification - How to recognize a Germanium Diode - Electrical . . .
    Use this schematic to test the diodes You can easily distinguish Silicon and Germanium Diodes Silicon diodes should read approx 0 7V and Germanium diodes should read 0 3V A little difficult to distinguish Schottky diodes though They should show approx 0 2V which is close to 0 3V If you have a very stable power supply and a good meter you can distinguish this as well! Good Luck! simulate
  • Output matching influences the input matching (RF amplifier)
    Prerequisites I try to design a radio frequency low noise amplifier with a SiGe transistor (BFP740 infineon ) The amplifier is designed as a common emmiter with inductive degeneration Observation
  • Why does MOSFET pinch-off occur? - Electrical Engineering Stack Exchange
    This question is about enhanced n-type MOSFETs From what I understand, an inversion layer is formed underneath the insulating layer below the gate of the MOSFET when a voltage is applied to the ga
  • How close are we to fabricating a germanium IC?
    5 I am not actually talking here about SiGe (silicon-germanium hybrids) but an integrated circuit that uses entirely Germanium (doped of course in certain areas)? It is my understanding that even though germanium was used to make the first discrete transistors, there are many problems with using it as a substrate for IC fabrication





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