Re: Input impedance of an energy saving fluorescent lamp (CFL) 21W
Hi Bordodynov and all who helped, Thank you very much for the link and the files for the 13W, 120V AC Compact Fluorescent lamp. Unfortunately, I was looking for a more representative power (20W or
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Michael Peter Kiwanuka
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#90091
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Re: Input impedance of an energy saving fluorescent lamp (CFL) 21W
Hi Bordodynov and all who helped, Thank you very much for the link and the files for the 13W, 120V AC Compact Fluorescent lamp. Unfortunately, I was looking for a more representative power (20W or
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Michael Peter Kiwanuka
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#90116
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Re: LT1171 model: syncronization not working
To answer the OT question. The VN2222 was a fairly generic ~5 ohm,60V vfet by modern standards. Similar devices are things like the generic? 2N7000 series available from many vendors. So an sot23
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Tim hughes
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#90055
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Re: Need help to design a transimpedance amplifier
Check the datasheet for the OPA 2846: Vn=1.2nV/sqrtHz, In=2.8pA/sqrtHz that means the OSI (optimum source impedance) is 428 ohms. The 100k resistors in the non-inverting inputs alone introduce 88uV
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Jerry Lee Marcel
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#90121
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Re: Need help to design a transimpedance amplifier
DON'T upload stuff anywhere but to the list web site. You can upload any sort of file to Files => Temp but big graphics files can go to Files => Big Files. With best wishes DESIGN IT IN! OOO ¨C Own
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John Woodgate <jmw1937@...>
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#90054
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Re: Need help to design a transimpedance amplifier
Let me say why am looking for new design.. We are currently using the receiver module which has three stages: 1. Trans Impedance stage 2. High Pass filter (HPF) stage 3. Unity gain amplifier (just for
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t.obulesu@...
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#90053
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Re: Thyristor library
"I read that sentence is concluded there was a missing "n": as in either -> neither (or possibly have -> haven't)." Hmmm. Good point. This forum is especially vulnerable to that because people here
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Andy
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#90052
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Re: Thyristor library
Andy wrote: "Hassan wrote: "I have found either the .lib file or the symbol !!! " That is good." I read that sentence is concluded there was a missing "n": as in either -> neither (or possibly have ->
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Tony Casey
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#90051
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Re: high frequency MHz and GHz range BJTtransistor or Mosfet
Frank Mead wrote: "The 2n918, 2n5179, and the 2n2857 are still alive and well in Mouser database... they are still used..." Indeed they are listed. But did you check the prices and availability? At
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Tony Casey
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#90050
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Re: LT1171 model: syncronization not working
Matt, I just looked at it, and it looks as if SOME of the LT1171's switching pulses are synchronized with the Vc input pin. Those ones have a narrower pulsewidth than the ones around them. Maybe it
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Andy
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#90082
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Re: LT1171 model: syncronization not working
Hello Matt, The sync-feature is only implemented in a very few SPICE models as far as I know, Best regards, Helmut
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Helmut Sennewald
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#90049
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Re: LT1171 model: syncronization not working
On many of the LT switch mode controllers, the sync function is not implemented in the spice model. Don¡¯t know about that specific one. Jim ' James Wagner Oregon Research Electronics
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Jim Wagner
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#90081
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Re: AD630 circuit simulation, no line shown
Helmut uploaded "CircuitAD631_1.zip" earlier, but I don't see a message from him yet. Maybe it is stuck in Yahoo-jail, like other messages are today. His upload says that he added SPICE Directives to
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Andy
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#90046
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"4 GROUP.zip" upload
Jeff (kinarfi) uploaded a file "4 GROUP.zip" to the group's Temp folder, but there is no message yet to the group about it. I don't know if you forgot to send one, or if it is just held up by today's
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Andy
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#90067
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Re: LTspice IV (NOT RESPONDING)
Yes this is a Windows thing, the 'not responding' is displayed in the window title bar after the application name. It usually means Windows is busy doing something else. So program is hung up.
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aurvii
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#90077
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Re: Thyristor library
(Another reply that vanished into the Internet): Hassan wrote: "I have found either the .lib file or the symbol !!! " That is good. The first thing to understand is that they are almost completely
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Andy
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#90045
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Re: Current Dependent Voltage Source
Wow, emails to [LTspice] are not making it again! Here is a message I sent several hours ago that hasn't shown up yet: --- "rmoreno.phone" asked how to enter a table of measured values for her/his
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Andy
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#90044
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Re: high frequency MHz and GHz range BJTtransistor or Mosfet
The 2n918, 2n5179, and the 2n2857 are still alive and well in Mouser database... they are still used... LTspice@...> wrote:
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Frank Mead <wa6ujj@...>
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#90043
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Re: Sub circuit heat dissipation not showing
Helmut, I know you said "All the Darlington transistors in my examples correctly plot power" But that's not my issue. I can see the plot/s but I was thinking I would see "dissipation" in watts as with
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Brad Feltz
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#90100
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Re: high frequency MHz and GHz range BJTtransistor or Mosfet
There is a standard multi-vibrator circuit that uses the industry workhorse driver the 2N2222 NPN BJT* and I believe it is listed in the examples files (educational) as "astable.asc". That is a good
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William
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#90066
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