Re: is there a model or subckt for the PWM chip SG3524?
Hi, Gandolf First as to your questions... Gandolf wrote: Yes. It's an op amp w/ jfet inputs (4 uA input currents measured at the op amp). Probably even a 741 would work though. Notaclue. ;-) Might be
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rainbowsally <rainbowsally@...>
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#56831
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Re: Kevin -- Tip: a cheap full load resistor
It will be unmoderated. Will you be available to be a second owner in case something happens to me so it can be shut down if it gets out of control (trolls, spam, etc.)? Helmut wrote:
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rainbowsally <rainbowsally@...>
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#56830
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Re: dual npn transistors and some obsolete op-amps
Usually a netlist is relatively easy to convert to a subcircuit. Send me the netlist and I'll see if I can convert it.
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jtanalog
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#56829
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Re: dual npn transistors and some obsolete op-amps
I see.. Thank you though..
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Shadow
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#56828
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Re: dual npn transistors and some obsolete op-amps
I also tried searching for it, and you were right, it was the first one on the search list.. sorry about that.. but uhhm, how do you convert that information to a spice model?
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Shadow
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#56827
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Re: application upgrade
Mike has said, in the LTspice World Tour seminars, that the extended versions of LTspice are used internally within Linear for chip design. He has said, specifically, that certain features, that would
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Jim Wagner
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#56826
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Re: dual npn transistors and some obsolete op-amps
No, sorry, I have the device. Larry From: LTspice@... [mailto:LTspice@...] On Behalf Of Shadow Sent: Sunday, August 26, 2012 11:41 AM To: LTspice@... Subject:
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Larry Beaty
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#56825
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Re: Kevin -- Tip: a cheap full load resistor
Hello Kevin, You could start a Yahoo group named like LTspice-follow-up Best regards, Helmut
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Helmut Sennewald
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#56824
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Re: dual npn transistors and some obsolete op-amps
What do you mean? Do you have the LTSPICE model of 2n2920?? If so, could you post here. It would be very helpful.
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Shadow
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#56822
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Re: dual npn transistors and some obsolete op-amps
In message <k1ddm4+i2u8@...>, dated Sun, 26 Aug 2012, Shadow <shadowvpr123@...> writes: Maybe you didn't search enough. The first hit I get from Google leads to:
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John Woodgate <jmw@...>
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#56823
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Re: dual npn transistors and some obsolete op-amps
My inventory shows a 2N2925, but shows no listing for quantity. If you want, let me know. Then I will search for it. Larry From: LTspice@... [mailto:LTspice@...] On Behalf Of
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Larry Beaty
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#56821
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Re: is there a model or subckt for the PWM chip SG3524?
rainbowsally wrote: Woops I forgot the link. It's in the forums file here. http://tech.groups.yahoo.com/group/LTspice/files/%20Temp/ <snip>
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rainbowsally <rainbowsally@...>
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#56820
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Re: is there a model or subckt for the PWM chip SG3524?
Cool. I'll go take a look. Got one uploaded and another one brewing myself. Gandolf wrote: :-) Yuh never know, Gandolf. Time may be non-linear. It su
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rainbowsally <rainbowsally@...>
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#56819
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Re: is there a model or subckt for the PWM chip SG3524?
Hi Gandolf. Gandolf wrote: Here's my first hack at a 'solution'. 555-pw-mod-rs-01-100Hz-5KHz.zip The ramp using an adjustable current source (actual xistor in the circuit) looks good but seems to be
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rainbowsally <rainbowsally@...>
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#56817
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dual npn transistors and some obsolete op-amps
Hello! Good day to all... I need to simulate a circuit involving a dual npn transistor, specifically 2N2920 transistor,.. Well I can't find a model here... Could you help me out... Maybe i didn't
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Shadow
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#56816
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Re: Kevin -- Tip: a cheap full load resistor
We did, Jack. Want to be included in the discussions? :-) If so, tell Helmut. The most recent offlist discussion was about current limiting in the power outputs (eliminates need for fuses in some
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rainbowsally <rainbowsally@...>
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#56815
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Re: Kevin -- Tip: a cheap full load resistor
Received and understood, Helumut. But it would be nice to be able to have a place to discuss this kind of stuff. We can get resistors, caps, and transistors, etc. from vendors, which is supported
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rainbowsally <rainbowsally@...>
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#56814
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Re: Kevin -- Tip: a cheap full load resistor
Can you guys take this amp private? ?You are cluttering up my mail box. ?:-( ? ?Jack ________________________________ To: LTspice@... Sent: Sunday, August 26, 2012 7:37 AM Subject:
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Jack Fanning
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#56813
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Re: application upgrade
In message <k1d6qc+gecf@...>, dated Sun, 26 Aug 2012, Helmut <helmutsennewald@...> writes: You can have ONE plot with a Y-axis on the left and another on the right in certain cases, such
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John Woodgate <jmw@...>
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#56818
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Re: application upgrade
Hello Riscy, LTspice is SPICE. You can use any SPICE model from any component vendor. Why do you think it's restricted? I am sure Mike will add new features in the future. LTspice a feature named
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Helmut Sennewald
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#56812
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