Recent content by Chandra214

We have come about with an approach to have a constant current load on the battery while the voltage is measured by an ADC to estimate the remaining battery charge.

We want to implement a fuel gauge into one of our field testing equipment. The batteries are Alkaline type. Is there any proven method to calculate the amount of usable charge left? Thanks in Advance Prathap Chandra

No we haven't considered it yet. But the assumption is:distance between the pulse driver and the transmitter is as less as possible. it seems, we might have to compromise with rise and fall times, may be upto 200ps.

With four transmitting channels, 680MHz can be distributed to 170MHz each. So each channel(pin) has to send out a 1ns pulse with 4.88ns delay between each ( worst case scenario). If I can find a circuit to generate a 1ns pulse like below: http://www.edn.com/article/CA476913.html can i...

http://www.micrel.com/_PDF/HBW/sy88922v.pdf This can do the trick, Hopefully! Do you foresee a problem with this?

Sorry.. the cycle time is 1.47ns The application needs a lot of buffer memory, so we can make use of a FPGA for two operations, one is for FIFO implementation on four 12 bit high speed ADC's and for generating 1ns pulses. ( virtex 5 LX30). Frankly speaking, generating this kind of a pulse is...

We would need the rise time and fall time to be within 50ps. 680Mhz is the frequency at which 1ns pulses need to be sent, i.e 1ns "high" time and 0.57ns "low" time. so the total time duration would be 1.57ns leading to 680MHz frequency.

we are not looking for a instrument solution. This should be implemented on a PCB. Right now we are considering MGT based FPGA for the solution.

Please suggest a method to generate a 1ns pulse. with 680MHz frequency. i.e ton: 1ns. the pin should also be able to generate pulses with pulse width anything from 1ns to 4s with 1ns step, i.e the pulse can take any value b/n 1 ns and 4s with 1ns step. This pulse is used to trigger a laser...

PT100 is a RTD Measurement using scope showed ambient noise level of 20mV

with sampling hundred times and taking its mean is serving the purpose. we are getting readings with +/- 0.25 degC. Thanks for your inputs.

I must admit, Am feeling like a novice now.. The sampling rate of the DMM is 3times/sec, where as ADC sampling rate is in MHz range. We see around four bits of instability. how do i calculate an appropriate sampling rate for a given impedance? right now we are getting acceptable...

We have a four wire PT100 signal conditioning circuit, which transpires resistance to voltage. 7mV constitutes one degree celsius. we are using a 12bit ADC to decode the analog input. When measured from a true RMS multi meter, the ADC input voltages are stable upto millivolt ( 4 1/2 digit...

samski. Rig up the circuit in your lab and find out the results. The current shouldn't matter at that pin.. If its going into PCB then provide an option for voltage divider, and check it out after you get the PCB

I think this statement helps " Jacinto (552MHz DSP, 348MHz ARM926E-JS and OMAP5946) a cost effective media processing engine for Automotive Infotainment applications, mainly to enable head-unit, rear seat entertainment and digital radio designers to create scalable reusable hardware and...