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# Ripple And Voltage

218 Threads found on edaboard.com: Ripple And Voltage

## I need power supply 50 v @ 30A

thank you for your replay; input is 220 v AC and accuracy in normal ripple not very high accuracy. thank you let us make it!

## can someone list the reason influences dc-dc voltage ripple

ESR of the output caps, input/output voltage, L, and switching frequency Vripple = {*(Vin/Vout)}*ESR

## gate bias of power amp?

can I use a micro like as ATtiny45 and its PWM to control output negative supply? Is it low ripple on output to not produce spur at output of rf power amp?

## Power supply transient response

I tested the load transient response of TI's Buck converter, and found that its performance is very good with less than 20mV voltage ripple from the light load to the heavy load. How could it be designed? loop crossover frequency? are they special techniques for load transient response? Added after 2 minutes:[/siz

## What's the relationship between frequency and voltage in PWM?

Following two eauation may help you. DeltaI = (Vdc / L) * T T = Pwm period Vdc = DC bus voltage L = inductanse Delta I = Maximum current ripple near the set point --------------------------------- Fmaxac= Fpwm / (Pwm resolution) with direction signal or Fmaxac= Fpwm / (2*Pwm resolution) without direction signal Fmaxac, frequ

## Best voltage reference in variable substrate voltage circuit

Hi, I'm working on a charge pump circuit design to make the substrate voltage level at negative values (-0.8 ~ -1.2 V). A level shifter, an accurate voltage reference and a comparator with hysteresis are used for the sake of make an stable substrate voltage level with a controlled ripple. ?How I can (...)

## Ripple voltage measurment using logic analyzer

Hi all, I need to measure the ripple volatage of the AC to DC adaptor. How can i do that using the Logic analyzer. Vpk-pk Voltgae gives the ripple voltage of the power adaptor right. since the coming signal is the dc and the peak to peak voltage gives the ripple (...)

## How to reject the ripple of supply?

I am doing a design of voltage regulator. There is a big ripple in the supply of power that supplies for regulator. and it is not a small signal. How to reject it?

## 12v capacitor + 12v dc motor + 12 dc power supply ??

any variation or ripple in voltage will be easily ignored and canceled out due to capacitor and motor will get constant voltage and hence will give constant RPM and power

## Reducing ripples in VCO

to reduce the ripple on the control voltage size the capacitor to filter the a second order loop filter the second pole should be sized to filter out the ripple.

## How to get a ref bias which higher than supply voltage

thanks zhlc3 and zhqian: i think charge pump maybe help to get a smoother voltage with little ripple but the biggest problem I encountered is how to implement by using the CMOS of 0.35um, and the ref bias must larger than 12V

## What is the purpose of using 2nd order loop filter for DLL?

Cuz the 2nd order DLL might be unstable. and the loop filter is used to minimize the ripple of the control voltage to reduce the jitter

## What is the exact meaning of the term"Glitch" ?

Hi What is the exact meaning of term"Glitch" and its similarity and difference with the terms: (jitter, Bounce and ripple)? thanks

## Clasic DC PSU calculations help

You can calculate the ripple using this equation. Vp is the peak voltage, RL is the load resistance and C is the capacitance in farads Dt is the time between peaks i.e if 50Hz supply and full wave rectified peaks will be at 1/100 of a second Vripple =(Vp/RL C)× Dt The power rating of the transformer (...)

## double forward converter

Hi all, sorry if my english isn`t entirely readable but isn`t precisely my native language I'm currently working in a project to build a programmable voltage supply, the input voltage is 220VAC and the output is variable from 0 to 200VDC with 0.5 A of maximum current with none or lowest possible ripple (...)

## 12V Transformerless PSU

It won't have any isolation making it dangerous. It is bound to be as bulky as a transformer option because it will need a high voltage/high ripple current capacitor as the AC dropping element and maybe another high wattage resistor.

## How to reduce the jitter of a pll

Am I wrong or the ripple in the control voltage is around 100nV? Are you sure about this values? What tecnologu are you using? Bye

## the ripple resulted by switch capacitor cmfb

in the picture,when phase 1 come, Vcm and Vbn create a voltage difference on the capacitor,when phase 2 come,the voltage difference is feedbacked to the lower transistor pair,and phase1 and phase 2 do not overlap but the simulation gives this result, periodic output dc level and some ripp

## Do we need high frequency inductor for 500kHz DCDC converter

The higher the frequency the lower the inductance value as the inductor impedance is wL. As for the output capacitance it is used to reduce the ripple of the output voltage and it's value can be reduced by increasing the switching frequency.

## Are u agree with this statement?

Say I have a buck converter. The output current Iout is constant, but the output voltage Vout has litte ripple. On the other hand, the input voltage Iin is constant, but the input current Iin is pulsating. I wish to calculate the input power Pin, and output power Pout, of the converter to calculate the (...)