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S.K said:Hi, I'm using a sensor connected to a amplifier of gain 100... But the output gives me only about 20-50mV Vpeak... How can i make the output to have at least 1V Vpeak?
Do i have to add another amplifer?
S.K said:Hi, I'm using a sensor connected to a amplifier of gain 100... But the output gives me only about 20-50mV Vpeak... How can i make the output to have at least 1V Vpeak?
Do i have to add another amplifer?
S.K said:I see... But how do i know whether the Vpeak will be at least 1V?
Isit if i get 20-50mV now using 100 gain, i multiply it by 10 to get the gain of 1000? Than i will know the value of Vpeak using the gain of 1000?
What sensor bridge excitation voltage are you using?
S.K said:Hi,
Oh... Thats how i get the value at gain 2000.... But i cannot find the Vout limits in the datasheets for gain of 2000... Isit in the electrical specs?
I am not clear about what sensor bridge excitation voltage... Can you explain it to me?
S.K
What is the supply voltage to the sensor and to the OPA?
S.K said:Hi,
I see... The supply voltage to the sensor and OPA is 3V.
S.K
S.K said:Hi,
So the higher the input voltage, the larger the ouput voltage peak?
S.K
S.K said:Hi, I'm using a sensor connected to a amplifier of gain 100... But the output gives me only about 20-50mV Vpeak... How can i make the output to have at least 1V Vpeak?
Do i have to add another amplifer?
S.K said:Hi,
As this is a school project and the design of the circuit is not done by me (done by previous student) i do not have the circuit diagram. I was given the circuit.
I'm using the sensor together with a magnet to detect heart rate.
But when i use the sensor to detect magnetic field from a permerant magnet, the output is about 1+V to 2+V. It seems that detecting heart rate using the sensor would result in very weak output.
S.K
S.K said:Hi,
I see... ok... I'll try 2000 gain... The OPA is connected to a µC. From the µC datasheet, the min input voltage to the port should be 0.9V and max should be 2.1V.
S.K
S.K said:Hi,
The mcu is detecting falling edges of the input signal.
S.K