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Hi,
The DC level with offset is 126-127 mv and the DC offset is 3.90-4.10mv (changing between specific interval). The frequency 300Hz.
So, I would like to detect the offset level to measure the falling time from Vmax to Vmin (Vmin should be 0v or detect the offset level and set the reference...
Hi,
I need to detect the "DC offset level" from the signal and "four stage band pass filter".
I am trying to measuring the Fluorescence decay time which is come from the Fiber optic thermometer. I am driving the LED by square pulse, then the square pulse is changed depending on the temperature...
Hi,
I need to detect the "DC offset level" from the signal and "four stage band pass filter".
I am trying to measuring the Fluorescence decay time which is come from the Fiber optic thermometer. I am driving the LED by square pulse, then the square pulse is changed depending on the temperature...
Hi,
I need to detect the "DC offset level" from the signal and "four stage band pass filter".
I am trying to measuring the Fluorescence decay time which is come from the Fiber optic thermometer. I am driving the LED by square pulse, then the square pulse is changed depending on the...
yes i am wrong ....but will this be enough to drive a PMOS??
---------- Post added at 02:49 ---------- Previous post was at 02:43 ----------
no i get an offset voltage all the time....even the output goes high or low....
yes i could be assumed to be 27.5 ohm..
---------- Post added at 20:31 ---------- Previous post was at 20:30 ----------
yes it could be assumed as 27.5 ohm.
so when i use this resistance between the drain to ground can i get expected output without any offset?
---------- Post added at 20:15 ---------- Previous post was at 20:14 ----------
I am using EVK1100 board with AVR32uc3a0512 controller.
---------- Post added at 20:16 ---------- Previous...
yes the connections is as you said .
but the source is connected to 5v supply and the PWM signal is applied to the gate of the PMOS.
I have put a resistor in between the drain to the ground . such that when i measure across the resistance
when the PWM of 3.3v is across the gate i need an...
I have a 50% duty cycle PWM signal from the microcontoller with 3.3v and i am using a PMOS as a switch with the resistor between collector to ground to have the desired voltage drop of 1.1v at 40mA current . but i face an offset in the output.
will this type of circuit can make a desired...
yes u r right one of the pin was an output pin , but it has been used for the input purposes andthen it started pulling the voltage. thanks for all your replies i also came to kow about the other possibilities for a voltage drop.
I havent used the MCU pull up.. the comparator out put pin is pulled up. I was able to read the comparator output to be 5v when it is not connected to the mcu input.
but i will try to use the pull up the MCU input pin and check for the 5v.
Is the resistor for the pull up is the main reason for the voltage drop??
but when i didnt connect the comparator output to the mcu i can measure the voltage as 5v.
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