Varun Praveen

Questions and Answers (4) View all

• Answer added in Bioinspired Engineering and Biomimetic Design
  2 Design considerations for an EMG amplifier
  By Varun Praveen · Amrita Vishwa Vidyapeetham
  Varun Praveen · Amrita Vishwa Vidyapeetham

  Thank you so much for your time sir.. We have managed to acquire the signal. The problem we faced earlier was that bias voltage ( the minimum voltag... [more]

  Thank you so much for your time sir.. We have managed to acquire the signal. The problem we faced earlier was that bias voltage ( the minimum voltage required for the IC to work) was much higher than the sEMG amplitude level, due to which the circuit wasn't working. Now that we have changed the IC used we have managed to overcome this problem. Also, we have used filters based on Multiple feedback topology for the noise elimination (signal conditioning). Would that be a problem?. The 'elbow driver' is nothing but the ground return for the instrumentation amplifier... Now we are planning to analyse the signal for to provide information of clinical importance. But we would like to know what kind of analysis can be done on the signal that would help the doctors.
  Following
• Question asked in Bioinspired Engineering and Biomimetic Design
  2 Design considerations for an EMG amplifier
  I have tried to design a surface Electromyograph front end sensor, using the TI INA118P instrumentation amplifier IC with a stage 1 gain of 20 followe... [more]
  I have tried to design a surface Electromyograph front end sensor, using the TI INA118P instrumentation amplifier IC with a stage 1 gain of 20 followed by two filters (a high pass filter of 10Hz cut off and a low pass filter of 300 Hz) to band-limit the signal between 10-300Hz (active 1st order filters using IC TLC 272). Also, I'd put in an elbow drive circuit. But I have noticed that a bias voltage of around 1V,200mHz had to be applied, to get the output else the circuit wouldn't work. Is there any way i can eliminate the need for this bias input?
  By Varun Praveen · Amrita Vishwa Vidyapeetham
  Following
• Question asked in Electrical Engineering
  Open Design considerations for the implementation of a front end sensor for Surface Electromyograph acquisition..
  I have tried to design an surface Electromyograph front end sensor, using the TI INA118P instrumentation amplifier IC with a stage 1 gain of 20...foll... [more]
  I have tried to design an surface Electromyograph front end sensor, using the TI INA118P instrumentation amplifier IC with a stage 1 gain of 20...followed by two filters ( a high pass filter of 10Hz cut off and a low pass filter of 300 Hz) to band-limit the signal between 10-300Hz...(active 1st order filters using IC TLC 272). Also, i'd put in an elbow drive circuit. But I have noticed that a bias voltage of around 1V,200mHz had to be applied, to get the output..else the circuit wouldn't work....is there any way i can eliminate the need for this bias input...??
  By Varun Praveen · Amrita Vishwa Vidyapeetham
  Following
• Question asked in Instrumentation Engineering
  1 Design considerations for the implementation of a front end sensor for Surface Electromyograph acquisition??
  I have tried to design an surface Electromyograph front end sensor, using the TI INA118P instrumentation amplifier IC with a stage 1 gain of 20...foll... [more]
  I have tried to design an surface Electromyograph front end sensor, using the TI INA118P instrumentation amplifier IC with a stage 1 gain of 20...followed by two filters ( a high pass filter of 10Hz cut off and a low pass filter of 300 Hz) to band-limit the signal between 10-300Hz...(active 1st order filters using IC TLC 272). Also, i'd put in an elbow drive circuit. But I have noticed that a bias voltage of around 1V,200mHz had to be applied, to get the output..else the circuit wouldn't work....is there any way i can eliminate the need for this bias input...??
  By Varun Praveen · Amrita Vishwa Vidyapeetham
  Following