Answer the following questions I have a sensor with an output voltage range of 0
ID: 1923368 • Letter: A
Question
Answer the following questions I have a sensor with an output voltage range of 0V to +5V and an output impedance of 100K. I want to interface this sensor to an analog to digital converter with an input range of 0V to +5V and an input impedance of 500 Ohm. What type of op-amp should I use for this interface? What type of op-amp would be best for measuring the output of a Wheatstone bridge? I have an audio circuit that outputs a signal with a frequency that ranges from 1kHz to 20kHz. Unfortunately there is a loud 60 Hz hum on the signal that comes from the AC power lines. What type of filter should I use to get rid of the hum? What should be the cut-off frequency of the filter in 3c? What type of amplifier has good common mode rejection?Explanation / Answer
a. for interfacing this sensor to ADC you need to use buffer which eliminate the need for input impedance matching
b. op-amp best for wheatstone bridge is one which has infinite input impedance and zero output impedence
c. you need to use high pass filter to remove this 60hz hum
d. the cutt-off frequency would be fc=1/2Rc
e. common emitter amplifier will have good common mode rejection