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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)
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
Highest speed of operation [BJT vs MOSFET] [closed] You can make SiGe bipolar transistors (on a chip) with ft's approaching 100GHz, and 4000 series CMOS (enhancement mode MOSFETS) that struggle to switch at 5MHz with low supply voltage
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
materials - When to use which semiconductor? - Electrical Engineering . . . High carrier mobility, which allows higher frequency devices For this you'll see materials like SiGe, GaAs, GaN, or InP used A specific lattice constant, for growing one material epitaxially on a substrate of another material The ability to engineer both lattice constant and bandgap is why you see ternary and quaternary compounds like
Maximum Allowed Radiated Continous Wave Power in 61. 25GHz ISM Band Still, getting stuff to work at 60 GHz isn't easy and probably will require a chip in SiGe technology like described in the last article you refer to Maybe the solution C Bredendiek etc describe transmits more power than allowed (OK if you sit in a Faraday cage) or is a solution that only is allowed in some regions