Search Engine www.edaboard.com

# Switched Capacitor Negative

17 Threads found on edaboard.com: Switched Capacitor Negative

## Power Efficiency Calculations of Switched Capacitor DC-DC Converter

Hi everyone, I'm designing a step down switched capacitor (SC) dc-dc converter. I'm using a spice simulation in order to observe the behavior of the circuit. I want to calculate the power efficiency of the SC converter. efficiency=Pout/Pin. pout=Iou*Vout which is constant. The problem here is the Pin since the current is fluctuating bet

## switched capacitor integrator satuartion and low dynamic range

Hello everyone !!! I am simulating a switched capacitor based integrator in Cadence. the problem is that the integrator saturates for very low values of input voltages. Also if i give a sinewave input of 100mV amplitude (riding over 0.9V dc; for 180nm technlogy), the output shows a sinewave which never goes below 0.9V. Can somebody expalin the

## Op-amp Negative output

The only circuit that can be used to get an output beyond VCC-VEE range of the supplied circuit is a circuit called "charge pump" . It is basically a switched capacitor circuit that can be used to generate a voltage greater than the available power supply. It is a quiet complicated circuit and you have to be very careful not to cause any damage to

## ICL7660 to generate -3v for negative gate bias is a good choice? (adds Phase noice?)

in general any switcher regulator will work. Since a gate typically draws no dc current, u might use a switched capacitor type regulator (no pesky magnetic field to shield). A simple R-C filter with a whopping big C should filter out the noise enough for most applications. Of course, if you are looking for very low phase noise, linear supplies

## stray capacitance for a switched capacitor integrator

can somebody tell me why the stray capacitance at the input and output of the switched capacitor circuit attached can be ignored? I dont understand why it can be ignored if the output impedance is low. It also says in the slide that if a stray capacitance is connected to a voltage source it can again be ignored...Need some help understanding

## Positive to negative voltage converter

As mentioned, we need to know your current requirements on the negative 12V. However... switched capacitor convertors are nice and easy: The ICL7660S converts a +1.5 to +12V into an equal magnitude negative output. It only needs two capacitors for a basic circuit - no inductors. The LT1054 is simila

## Negative capacitor value in switched capacitor filters

I saw negative value for capacitors in SC filter calculation manuals. What it means? How to perform it in cadence? Thanks.

## positive to negative converter

For small currents and voltage up to 12V (maximum), a switched capacitor converter like ICL7660 can do, otherwise you need a switched mode converter in inverting configuration. Many standard buck converters can be used in inverting mode similar to this application note:

## Is MC1488 equivalent to MAX232?

The MC1488 is a quad line driver. The MAX232 has two drivers and two receivers. The MAX232 generates the negative voltage needed, using a switched capacitor circuit. The MC1488 doesn´t generate it and must have a negative power supply (Vee). Just take a look at the MC1488´s datasheet.

## TL071 Negative power supply?

A 7660 switched capacitor voltage converter can do, if the circuit can work with a rail-to-rail OP, it's the easier variant.

## Ac analysis of switched capacitor circuit

1.) AC simulation is a small signal analysis and works only for linear and time-invariant circuits. 2.) Therefore, when s/C circuits are going to be simulated in the frequency domain, it is necessary to replace each switched cap with a time continuous element before. 3.) The most popular way is to use a combination of delay elements (artificial w

## A Question About SC Integrators

The figure below is the differential output of a switched-capacitor integrator. The input is a 1 mV sine wave: 1m×sinωt. Theoretically the output should be 16m×(1 - cosωt) but it is 16m×(0.5 - cosωt) i.e. it has a 8 mV negative offset and I don't know why? The sampling frequency is 62.5 KHz and the integrator structure is the (...)

## Level Shift from 4.2v to -0.7v?

May be you can try with a switched capacitor voltage converter from positive to negative voltage e.g. ICL7660: Bye Powermos Thanks, TekUT. I know this way to generate a negative voltage by switched-cap. voltage inverter. I want to know the other ways to ge

## switched capacitor voltage converter

Hello, all I want to design a negative voltage with switched capacitor voltage converter like TL7660. I was wondering how to take some problems like latch up, power loss. Hope someone give me materials on that. Thanks.

## Negative resistance with switched capacitor

I know this is very fundamental but I could not grasp it correctly. The circuit in the left shows a positive resistor while the one at the right shows a negative resistor. Here's my analysis on the positive resistor. Assuming from S1 is on from 0 to T/2 but off from T/2 to T, S2 is off from 0 to T/2 but on from T/2 to T. V1 is the voltage at t

## positive to negative voltage IC

for low power apps you can use MAX1044/ICL7660 (switched-capacitor Voltage Converters) for more power you can use any switchin IC source like MC34063 in voltage inverting configuration (for this you need an inductor). hope this helps, //a

## switched capacitor dc-dc converter

A book about switched Mode Power Supply Can you re-post the book ?