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my dear:
first pmos and second mos like ESD protect device,
forth nmos is mos capacitor, thirth and fifth device like
current sink tank, thanks,
c.c.huang
Added after 2 minutes:
my dear:
first pmos and second...
my dear all:
I think the different software have different benefit and drawback,
spectre and spectreRF are suittable to do IC design, MWO is suitable to
do filter, simple VCO and passive circuit design, ADS is a strong system...
my dear :
I think the opamp circuit is basic of IC circuit design struction,
most of analog circuit are more complex and hard, example PA and
demodulation circuit, so opamp is the basic but important part of IC
design, this is my little...
Re: RFID questions
my dear:
There is iso-18000-4 specification, teh back scalar is about energy
influction on antenna, when you load modulation tag terminal, the tag
antenna will reflection energy from reader antenna, this phenomenon is...
Re: Antenna design tools
my dear:
IE3D, HFSS10.1, CST2006, ADS2006B are EM wave simulator for
microwave and antenna design tool, if you want to simulation PCB atenna,
ex FR4 material, i suggest you use CST and ADS to do co-simulation.
C.C.HUNAG
my dear:
This is 125KHz RFID reader circuit, VT1~VT3 are output driver,
DA2:A~C are receiver amplifier, R6~R9, L1, C5, C6 are Tx filter,
C7~C10, R10~R13 are envelope detector and passive filter.
C.C.HUANG
my dear all:
I think the save energy product are the main in the futhure,
so, passive RFID, Low power design, DC-DC, AC-DC, are more
important topic, thanks
c.c.huang
my dear:
I am analog IC design enginner in RFID field, i suggest you to use
class E or class F power amplifier, because RFID is CW type transmitter,
if you use classical linear amplifier, your reader is very easy to burn and
broken, so you need to...
my dear:
you could try detect circuit by receive, like envelope detect by
ASK...ect, than you could adding a filter to rejection noise, last, you
need to add some amplifier to gain your weak signal, but your amplifier
bandwidth need to control by your...
my dear:
I answer you those two question,
1. what's passive define? it's passive active by active device,
so tag need to get power by active system that's call reader.
tag need to get clock signal by reader, when 100%...
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