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Recent content by JanniS

  1. J

    monte carlo histogram data from ocean

    Thank you for your reply. I read the manual and tried all kind of combinations but without any results. However, I just discovered that it is possible to sweep parameters in the monte carlo GUI setup, which makes my simulations a little less dependent on me :-) Janni
  2. J

    monte carlo histogram data from ocean

    Hello I am working on a ocean script for a monte carlo simulation. I am simulating an comparator and the output is either high or low. I want to get the hisogram data from the monte carlo simulation in a vector to wrtie to a database. Everything works, but not the histogram data. Any...
  3. J

    ADC and DAC input range

    Hello I am currently working on a 8-bit ADC. So far i chose the current steering DAC due to low mismatch gradient. During my transient simulations I just disvovered that the converter struggels as the output passes 1 V. The supply is single supply at 3.6 V and the input range is specified to be...
  4. J

    [SOLVED] Switched capacitance integrator

    Ah ok. So why would one choose to use the SC integrator and not an RC integrator? Janni
  5. J

    [SOLVED] Switched capacitance integrator

    Hello I am studying integrators and just found the switched capacitor integrator. I saw, that the switched capacitor, C1, acts as a resistor with the value of 1/fC1. The time constant is then fC1/C2, where C2 is the feedback capacitor. Just to be sure: The time constant changes as a function...
  6. J

    [SOLVED] Simulate Vn to output jitter, pwm

    I made a PWM and a triangle generator to control it. I would like to see the phasenoise of the output signal. I tried PSS + Pnoise, but i get an error saying: ERROR (CMI-2208): `V4' is a periodic input signal, which is inconsistent with autonomous circuits. V4 is a reset pulse with the...
  7. J

    [SOLVED] simulate open loop gain

    I am not sure what you mean by single supply. My test bench looks like this:
  8. J

    [SOLVED] simulate open loop gain

    I thought that maybe the gain was too high to find a point in the middle . The sweep response looks as I expected but it tilts no matter how close i get to the point in the middle I also tried with the inductor but the phase response is the same and starts at -180 degrees as seen on the figure...
  9. J

    [SOLVED] simulate open loop gain

    I have a problem with an open loop simulation. I have a resistive load of 10 Kohm and a capacitive of 1pF. Usually I just insert a DC offset voltage source at one of the input terminals, run a DC sweep and chose the offset value to be where the output voltage is in the middle. This time I can...
  10. J

    [SOLVED] Weird phase of opamp

    Hi! I am doing a class AB common source output amplifier with a folded cascode gain stage. The load is 1pF and 10 kHz. supply is 0-5V. the gain is > 70 dB Everything was working as expexted until I changed the DC voltage of the load. When loads are grounded the phase and gain are as I...

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