engineering recuitment GATE IN Test Series 2023-24 Mock Test Sensors and Industrial Instrumentation Capacitive Transducers
A push pull capacitive displacement transducer is interfaced to a differential amplifier and an ADC as shown in the figure below.
Note that the bridge supply and the analog reference input for the ADC are derived from the same 10V DC source.
The change in capacitance for full scale displacement is ±5% for the capacitors. The gain of the differential amplifier for utilization of the full range of the ADC (which is ± 10 V) is
1
10
2
20
3
30
4
40