Unofficial Austrumi Linux for English users forum golf & dvd

A Latvian and english Linux tiny operating system. used by golf & dvd lovers

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#1 2011-05-30 09:14:25

atang1
Administrator
Registered: 2006-03-30
Posts: 2705

Watch out new flash cards are not marked DHC for latest card readers.

Dense high capacity flash cards are hitting the market in 32 gB capacity. HC card readers can only read 4 gB and data corruption on the rest of the 32 gB data storage. New DHC card readers cost $28+. HC card readers cost $6+.

This is done by the new technology of 8 gates on each flash transistor. HC is only two gates on each flash transistor.

The new technology of more gates increased the data compression ratio. But you need new readers that can get the analog data reads.

This progress, will mean very cheap  data storage in flash transistors that is non volatile. Batteries will last longer in electronic devices.

But Chinese manufacturers forgot to distinguish them by marking them DHC for a new generation of card readers.

Data compression is started with ascii codes. We can replace them with video braille, then compress again with mpeg4/h.264. some day replace mpeg4 with Fresnel formula and its four numbers to define a picture of video braille. There are data compression limits, just look at ascii codes and the whole 256 codes are never filled up fully. There are wastage in ascii codes(8 bits). There are wastage in ascii codes of languages upto 32 bits. Languages are now being obsoleted by javabeans(800,000) in smartphones, so ascii codes are mostly 8 bit as reference.

So, 32 and 64 gates per flash transistor may never be needed.

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2011-05-30 09:14:25

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#2 2011-05-31 11:01:58

atang1
Administrator
Registered: 2006-03-30
Posts: 2705

Re: Watch out new flash cards are not marked DHC for latest card readers.

Years ago(2005), we started putting Fresnel antenna on gates, so that we can use radio frequency to turn flash gates on and off. The line width had to be ten times smaller than the line width used for transistors.
Radio frequency carrier has to have intermediate frequencies and mux(multiplexers) to carry data to switch transistors on and off.

Its important to limit higher frequencies to 75 ghz(short range) and go down to 1 hz(long range data transmission) for many data channels.

Semiconductor manufacturing has not been the same, ever since ion deposition, doing mesa structures rather than restructive planar design.

Radio frequency bus has been used on chips since 1998. On strip line circuits(1 ghz and up) using antenna on input and output of the strip line circuit to reach other circuits on the same chip or any circuit in the metal case. Then we did the Fresnel antenna directly on the gates in strip line circuits. Then in 2005 we have multiple gates per transistor.

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#3 2011-05-31 19:34:46

atang1
Administrator
Registered: 2006-03-30
Posts: 2705

Re: Watch out new flash cards are not marked DHC for latest card readers.

There have been some problems with 32 gB SD cards, mostly due to the write current only charges the gate, insufficient to damage it slightly then reflow to restore data writes. This is mainly due to 3.3 volts of the old flash cards and the new 1.8 volt ones. Most new cameras can do it right, but the older card readers can not do new 32 gB SD cards. Introducing data corruption if injected charges on gate disappear overnight.

Such is the problems with older equipment, that can not do new devices. Mandriva maybe able to sell OS on USB cards again, if they can find card readers that can write on 1.8 volt SD cards.

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