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Recent content by shlooky

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    Plotting Monte-Carlo results using OCEAN XL

    Hi all ! I have OCEAN-XL script that runs Monte-Carlo simulations. My output expressions (using "ocnxlOutputExpr()") are set up properly. "ocnxlOutputSummary()" reports correct scalar values in CIW. My problem is.... I cannot plot the histogram of my scalar values. Basically, I am looking for...
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    OCEAN script issue

    Hi there, This is not me.... just a coincidence. I do not have access to Cadence Forums. That's why I have been using this awesome forum :) 1704131971 My expressions are working fine. When I plot the waveforms manually using awvPlotWaveform() function, everything is working perfectly. As...
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    OCEAN script issue

    Hi there! Probably a very basic question, but I could not google my answer... been trying for days... I am (SKILL newbie) trying to write an OCEAN script that would read CSV file containing 12 columns of data and display those as waveforms. Everything works just fine, my problem is with the...
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    Loop gain simulation in active load

    Thank you, man! I simulated the open loop gain with schematic very similar to what you described above... and the results look VERY close to the datasheet. Lesson learned... Thanks again
  5. S

    Loop gain simulation in active load

    Hi there, I am trying to design a programmable DC load that can regulate small currents / small power dissipation (as low as possible). It will be used in low-voltage / low-power projects. I know that literally any MOSFET would work here. I picked ALD MOSFET because in its datasheet, it has...
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    Loop gain simulation in active load

    Hi guys, Thanks for your inputs. The circuit is designed to regulate very small currents / voltages. Range of mA / units of V. My MOSFET is actually ALD210808 - P_diss up to 0.5W. Its input C is mere 15 pF. I could not find a model online, so I just used the smallest MOSFET in original LTSpice...
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    Loop gain simulation in active load

    Hi all, I am trying to analyze an active load circuit designed for the lowest current possible. Schematic in the picture. I tried to amplify the sensed voltage (by 100 / 40dB) to increase the sensitivity. Yes, I know this circuit can easily oscillate... My question is, which node should I...
  8. S

    What kind of amp is this?

    Fig. a - Common source amplifier with M2 as a load Fig. b - Common drain / Voltage Follower with M1 as current source Fig. c - Common emitter with Q2 as load Fig. d - Common emitter (load connected to collector of Q2) with Q1 as current source
  9. S

    Dose dynamic IR drop affect timing?

    Hi, Just curious here... which technology node are you working with? Thanks Shlooky
  10. S

    Design current mirror

    Hi, The picture you posted confirms my point. Voltage conditions are not ok. Looks like your M92 is in linear regime... VGS = 3.599V, but your VDS = 5 - 1.401 = 2.6V. Both devices need to be saturated.... I was not expecting 5V and 1mA in 180 nm CMOS, but if those are thick oxide devices, no...
  11. S

    Design current mirror

    Hi there, What is the minimal L for the MOSFET? It is a good practice to use about 10x Lmin in given technology to minimize channel length modulation, improve the threshold voltage stability (VTH vs L) and minmize the dependency on process variations (MC simulations). The transistors in...
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    [SOLVED] Mutual Inductance Calibre PEX Mapping

    Hi all, I solved this issue by adding the following into the mapping file ((p ind l) (analogLib pinductor symbol) ( (PLUS) (MINUS) ) ) ((p mutk k) (analogLib pmind symbol) ( (ind1) (ind2) ) )
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    [SOLVED] Mutual Inductance Calibre PEX Mapping

    Hi all, I've got successfully extracted parasitic inductor from my layout. Calibre PEX also extracted mutual inductance between the inductors. They are both present in extracted netlist. My problem is, I cannot map the mutual inductance into a cell view (calibreview) because the mapping file...
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    Bandgap Voltage Reference

    Hi there, There are plenty of PDFs / videos online. You should pick a topology suitable for your application. What is your technology? What is your supply voltage? What parameters you need to meet? What is your bandgap going to drive? How precise it needs to be and across what temperature...
  15. S

    Ripple voltage on high voltage DC power supply

    Hi there, That might work.... What's wrong with standard resistor divider with "high-enough" resistance so it does not load the source? Indirect current measurement with current probe / hall probe and oscilloscope and resistor load? There are current probes available for very low current...
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