Signal Conditioning Circuit For Sensors. Two circuits are used for signal conditioning. An ac coupled detector having a dynamic dc threshold.
Charge mode amplification is used when the amplifier is remote to the sensor. Components r2 r3 r4 and r5 are adjusted to change the desired measurement temperature span and output. Signal conditioning is generally required for reliable and accurate daq.
Voltage mode amplification is used when the amplifier is very close to the sensor.
Without conditioning the signal can be too small for the input dynamic range of the adc which gives rise to nonoptimal daq with low snr. Signal conditioning circuits are used to process the output signal from sensors of a measurement system to be suitable for the next stage of operation the function of the signal conditioning circuits include the following items. Usually low pass high pass or band filter is implemented to eliminate unwanted signal. Dealing with high impedance sources and maintaining high impedance inputs without compromising reliability has its own set of challenges.
