An accelerometer with charge sensitivity 50 pCg with capacit

An accelerometer with charge sensitivity 50 pC/g with capacitance 500pF is connected to a voltage follower circuit. The connecting cable and the input connector are found to have parasitic capacitances of respectively 250 pF and 16pF. Also, the blocking capacitor is set at 10nF and the blocking resistor at 50M. 1. Please draw the schematic of the accelerator which should show all the component values. 2. Determine the transfer function that relates the output voltage to the measured acceleration. 3. Determine the type of filter the transfer function from part (2) represents. Calculate the cut-off frequency and bandpass gain.

Solution

transfer function = R /(R1 + sC) = 100/(100 + 25s)

this is low pass filter