Wednesday, 20 March 2019
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A patent-pending wafer process, that’s an alternative to MOS and bipolar technology.
Bizen, an acronym of bipolar and Zener, uses Zener quantum tunnel mechanics to provide a different way to isolate the base well called the ‘Tunnel’ terminal. Designers can do away with the resistor, like in MOS and take advantage of the now controllable current. With Bizen, the output terminals that would normally be called the emitter, source, collector or drain, are instead called Anode 1 and 2. The two regions are identical, meaning the transistor has identical forward and reverse characteristics, allowing for AC signals and push/pull circuits.

The result is a disruptive wafer process with lower dynamic power, higher speed and higher gate density, all slingshot by 1\2 the process layers, 1\3 the material use and 1\10 the lead time.

 

 https://www.wafertrain.com/images/template/PBizentransistorsymbolsmalllabeled.png

 
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3 years ago
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#46
I just found a press-release today about the new Bizen transistor and find it very interesting for this project: http://www.max-i.org , which is for the moment implemented by means of bipolar transistors for the analog and power part and CMOS for the FPGA, but where can I find more information and examples about how to drive and use these new transistors in practice in for example logic gates, analog circuits and power circuits (up to 40 V, 1 A)?

Is complementary technology possible, that is, comparable to both NPN and PNP transistors? The name A1 and A2 could indicate a drive scheme similar to an N-channel JFET and that a complementary device like a P-channel JFET is not possible.

Which device types are possible in the process? Is it for example possible to make resistors, fast diodes - preferable schottky diodes, capacitors and programmable non-volatile memory like an EEPROM?

Are any Spice models generally available? I have seen that they may be available as a part of a Cadence package, but for a start, some (simplified) models, which can be used with LTSpice would be a great help to find out if the Bizen technology is usable for our project.
3 years ago
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#49
Hi,

Sounds interesting to be considered as an in-house project, but I still have my concerns whether the Bizen technology is usable for our project.

There is almost no information about how Bizen works and is used on this site - why(?) - but on the internet, I have found a little. It turns out that a Bizen NOR gate is very much equal to a two-transistors-plus-one-resistor TTL NAND gate (one multi-emitter input transistor with basis connected to Vcc through a resistor and the collector connected to the basis of the output transistor with open collector. This is also current controlled in the same way as the Bizen transistor and the collector output is therefore also normally on. I can understand that you want to highlight the new transistor in relation to CMOS and TTL, but your comparison between a single transistor Bizen NOR-gate and a 14-component TTL gate as shown for example here: https://www.eenewseurope.com/news/bizen-uses-quantum-tunnelling-smaller-chips/page/0/1 is simply not fair!!! It only requires 3 components to do exactly the same with TTL, and in this case, the triggering level will be approximately 0.6 V above Vee where yours is 0.2-0.3 V below the positive supply rail, so they are also very much the same!

You mention 650 and 1200 V more places, but the operating principle of the Bizen transistor makes me believe that it can only handle very low voltage levels in the order of 3-5 V or else the zener inputs will break down, so analog circuitry above that voltage level is not possible. The high voltage and current levels, you mention, comes from the added NPN transistor - not from Bizen itself. Is this right?
3 years ago
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#55
If this allows AC would this product not be massively disruptive to the design of power control products seeing as you would not need separate negative and positive relay current paths?

I really hope to get more info publicly available to understand how the product can be used.
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