To simulate signal processing circuit based on op amp and sensor
- 1. To Simulate Signal Processing Circuit Based on OP-Amp and Sensor Guide: ASSO.Prof. Dr.Dhyey Raval HOD: Prof.Ajit.Pujara 1 Prepared by: GAJJAR SHRAVAN A. (130810108004)
- 2. NO DESCRIPTION 1 Introduction 2 Operational Amplifiers 3 Signal Processing circuits based on op-amp 4 SIMULATION OF OPAMP AS COMPARATOR 5 Results And Observation 6 Conclusion INDEX
- 3. 1.Introduction -Signal processing 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: Signal amplification (opamp), Filtering (opamp), Interfacing with P (ADC), Protection (Zener & photo isolation), Linearization, Current – voltage change circuits, resistance change circuits (Wheatstone bridge), error compensation.
- 4. 2.Operational Amplifiers Operational amplifiers are the basic element of many signal conditioning modules Generally the opamp has the following properties: Gain: being of the order greater than 100000, ideally = infinite Input impedance: ideally infinite output impedance: ideally zero; practical values 20-100
- 5. Voltage Comparator – digitizeinput Non-Inverting Amp Inverting Amp Voltage Follower
- 6. 3. Signal Processing circuits based on op-amp If the voltage applied to v1 is greater than V2 then the output is constant voltage equal to (-10V) if (V2>V1) then the output is constant voltage =(+10V). This can be used in the following example: The output indicates which V2). When used with no feedback connection of the two voltages is high (V1 or V2)
- 7. The circuit is designed to control temperature with a certain range. When the temp. is below certain value, the thermistor R1 is more than R2 and the bridge is out of balance, it gives an output at its lower saturation limit which keeps the transistor OFF. When temperature rises and R1 falls the opamp switch to +ive saturation value and switch the transistor ON
- 8. 4.SIMULATION OF OPAMP AS COMPARATOR COMPARATOR
- 10. 6.Conclusion After performing this simulation we conclude that operation amplifier can work as comparator and it sense the temperature and start rotating fan based on reference voltage applied on non-inverting pin of op-amp.