Resistor Simulator Design Please Help - Electronic Circuits Projects Diagrams Free

Frosty_47 · 6th November 2009, 11:18 PM

Hello folks,

Today I built switched capacitor resistor simulator that did not work with any MOSFETS, Capacitors, or waveforms that I tried. I Fed two square waves 180 degrees out of phase to the gates of MOSFETS as required. The MOSFETS driving frequency was 1Khz and the cap was 1uF. The signal frequency was 100Hz sine wave. My output was completely messed up and is impossible to describe.

Is there any resistor simulator circuit out there that was actually built and tested as opposed to this wikipedia shit?
Switched capacitor - Wikipedia, the free encyclopedia

Papabravo · 7th November 2009, 12:12 AM

I did not see any resistors in the article. What are you trying to do exactly?

Sceadwian · 7th November 2009, 12:37 AM

It's not a switched capacitor design but I ran across a reference design in "The Giant Handbook of Electronic Circuits" It's an old design but it includes all component values except the darlington pairs, I'm guessing with a modern opamp you may not need them depending on your requirements.\
Sorry about the bad picture, it's just a quick cell phone grab. Should be enough to get the jistt of it.

Sceadwian · 7th November 2009, 01:11 AM

I take that back, I guess the darlington pair is integral to the LM13600. It looks incredibly simple t o construct.

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6th November 2009, 11:18 PM	#1
Frosty_47	Resistor Simulator Design Please Help Hello folks, Today I built switched capacitor resistor simulator that did not work with any MOSFETS, Capacitors, or waveforms that I tried. I Fed two square waves 180 degrees out of phase to the gates of MOSFETS as required. The MOSFETS driving frequency was 1Khz and the cap was 1uF. The signal frequency was 100Hz sine wave. My output was completely messed up and is impossible to describe. Is there any resistor simulator circuit out there that was actually built and tested as opposed to this wikipedia shit? Switched capacitor - Wikipedia, the free encyclopedia __________________ "The people who cast the votes don't decide an election, the people who count the votes do." -Joseph Stalin Last edited by Frosty_47; 6th November 2009 at 11:18 PM.

7th November 2009, 12:12 AM	#2
Papabravo	I did not see any resistors in the article. What are you trying to do exactly? __________________ We never have time to do it right; but we always have time to do it over.

7th November 2009, 12:37 AM	#3
Sceadwian	It's not a switched capacitor design but I ran across a reference design in "The Giant Handbook of Electronic Circuits" It's an old design but it includes all component values except the darlington pairs, I'm guessing with a modern opamp you may not need them depending on your requirements.\ Sorry about the bad picture, it's just a quick cell phone grab. Should be enough to get the jistt of it. Attached Thumbnails __________________ "Because I be what I be. I would tell you what you want to know if I could, mum, but I be a cat, and no cat anywhere ever gave anyone a straight answer, har har." Last edited by Sceadwian; 7th November 2009 at 12:40 AM.

7th November 2009, 01:11 AM	#4
Sceadwian	I take that back, I guess the darlington pair is integral to the LM13600. It looks incredibly simple t o construct. __________________ "Because I be what I be. I would tell you what you want to know if I could, mum, but I be a cat, and no cat anywhere ever gave anyone a straight answer, har har."