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Question about what parts to use for circuit diagram

Hello all! I'm new here and I hope to learn some stuff and also help others in the future here.

I am trying to imitate a circuit that is introduced in a paper from IEEE Journal of Solid-State circuits. I need some help at to which parts I need to use to get similiar results as they have done in the paper. I have tried fooling around with various parts, but couldn't get things to work. Here is a picture of the circuit:

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The circuit that I'm working on is a modified charge pump. For the diodes, I'm not sure which MOSFETs to use because it doesn't mention it in the paper (NMOS or PMOS?). Also, for the automatic driving buffer, I'm pretty sure those are NOT gates, but I'm not sure which part to use because the last three of them have 2 outputs on the NOT gates. Also, I'm not sure which comparator to use. I'm assuming I can use a vdc for the voltage ref. Also, what can I use for the VCO and bias block. If you guys need the entire paper uploaded, I can do that also. Once I get the parts right, I'm sure I can wire this up fine...or not...haha Anyways, any help on this is greatly appreciated.

Reply to
andrew410
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PMOS (think DIODE)

Certainly a weird looking configuration.

I find VCO controlled charge pumps can lock up in strange ways.

What does the description in the paper say?

There's "ChargePump-4X-Example.pdf" on the S.E.D/Schematic page of my website.

...Jim Thompson

--
|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
|  Analog/Mixed-Signal ASIC\'s and Discrete Systems  |    manus    |
|  Phoenix, Arizona            Voice:(480)460-2350  |             |
|  E-mail Address at Website     Fax:(480)460-2142  |  Brass Rat  |
|       http://www.analog-innovations.com           |    1962     |
             
I love to cook with wine.      Sometimes I even put it in the food.
Reply to
Jim Thompson

The diodes are the intrinsic body diodes (note the explicitly- drawn body connection) of the p-type MOSFETs (note the circle in the gate).

They're inverters, but the extra wire you see is not an output, but rather a three-state control input (note how the control wires go into the gate from right angles).

That'd be a good idea.

--
 Thanks,
    - Win
Reply to
Winfield Hill

Thanks for replying so fast.

The paper can be downloaded here:

formatting link

I already have read the paper and understand most of it conceptually, but I can't get which parts they used to build the circuit.

parts but just its functions. Because of this I am struggling to put the circuit together. I just need something that resembles the proposed circuit in the paper. The results don't have to be as good as theirs either. Also, I'm not really building the circuit in real life, but just need to simulate it through Pspice. The problem is though, like I have said, is that I'm not sure which parts to use for the circuit. If someone could just skim through and see which parts I could try using then that would be great. Thanks in advance! :)

Reply to
Andrew410

It asks for a log in.

If it came from the Circuits and Systems society there's a good chance they're thinking you'll build it into a chip design, so you find the 'parts' in your process's library.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Posting from Google?  See http://cfaj.freeshell.org/google/
Reply to
Tim Wescott

You actually don't have to log in. On the link, there is a blue box with "Download Now" written on it. That should let you download the file. I just need to know which parts I can use in Pspice from the default process's library. I had to chose a paper from the IEEE Journal of Solid-State circuits and I happened to chose this. By the time I figured out this circuit was difficult to construct, it was too late for me to change to another paper. So, I am stuck with a difficult circuit, but I believe this is a good opportunity for me to learn more about transistors. I just need to know which parts I can try to get the circuit working decently with decent results. Even if the results aren't that great, I could still just discuss about the results.

Reply to
Andrew410

As Mr. Hill replied:

I googled it and found that what your talking about is a tri-state inverter. Am I right? If that is the case then what Pspice part can I use? I already tried googling "tri-state inverter", but couldn't find anything that gave me a part number.

Reply to
Andrew410

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