A piezoelectric transducer has a capacitance of 1000pF and a charge sensitivity of 40 10????3C=m. The connecting cable has a capacitance of 300pF , while the ocr used for read out has a resistance of 1M with a parallel capacitance of 50pF.
63 i. What is the sensitivity in V/m of the transducer alone?
ii. What is the high frequency sensitivity in V/m of the entire measuring system?
iii. What is the lowest frequency that can be measured with 5% amplitude error by the entire system?
iv. What is the value of an external shunt capacitance that can be connected in order to extend the range of 5% error down to 10Hz
v. With external capacitance calculated in (b) above connected in the circuit what is the system high frequency sensitivity?