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university:courses:electronics:electronics-lab-heartbeat [23 Aug 2019 15:09]
Antoniu Miclaus
university:courses:electronics:electronics-lab-heartbeat [08 Sep 2020 04:45]
Alexanadre Robichaud fixing resistor naming
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 The input signal from the heartbeat measurement setup is fed into a Differentiator Amplifier Circuit(([[http://​www.electronics-tutorials.ws/​opamp/​opamp_7.html|Differentiator Amplifier]])) (C<​sub>​1</​sub>,​ A<​sub>​1</​sub>,​ R<​sub>​3</​sub>​). The capacitor blocks any DC content, C<​sub>​1</​sub>​ and R<​sub>​3</​sub>​ behaving as a high pass filter with the cut-off frequency F<​sub>​c1</​sub>​ being determined by the following formula: The input signal from the heartbeat measurement setup is fed into a Differentiator Amplifier Circuit(([[http://​www.electronics-tutorials.ws/​opamp/​opamp_7.html|Differentiator Amplifier]])) (C<​sub>​1</​sub>,​ A<​sub>​1</​sub>,​ R<​sub>​3</​sub>​). The capacitor blocks any DC content, C<​sub>​1</​sub>​ and R<​sub>​3</​sub>​ behaving as a high pass filter with the cut-off frequency F<​sub>​c1</​sub>​ being determined by the following formula:
-<WRAP centeralign><​m>​F_c1=1/​{2 pi R_3C_1}</​m></​WRAP>​+<WRAP centeralign><​m>​F_c1=1/​{2 pi R_1C_1}</​m></​WRAP>​
 Besides filtering, this stage serves also as an amplifier taking as input the current (I<​sub>​A1</​sub>​),​ and generating at the output an inverted voltage (V<​sub>​A1</​sub>​) based on the negative feedback resistance (R<​sub>​3</​sub>​): ​ Besides filtering, this stage serves also as an amplifier taking as input the current (I<​sub>​A1</​sub>​),​ and generating at the output an inverted voltage (V<​sub>​A1</​sub>​) based on the negative feedback resistance (R<​sub>​3</​sub>​): ​
-<WRAP centeralign><​m>​V_A1=-I_A1*R_3</​m></​WRAP>​+<WRAP centeralign><​m>​V_A1=-I_A1*R_1</​m></​WRAP>​
  
 ====Active Low-Pass Filter=== ====Active Low-Pass Filter===
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 <WRAP round download>​ <WRAP round download>​
 ** Lab Resources:​** ** Lab Resources:​**
-  * LTSpice files: [[ https://​minhaskamal.github.io/​DownGit/#/​home?​url=https://​github.com/​analogdevicesinc/​education_tools/​tree/​master/​m2k/​ltspice/​heartbeat_ltspice | heartbeat_ltspice]] +  * LTSpice files: [[downgit>education_tools/​tree/​master/​m2k/​ltspice/​heartbeat_ltspice | heartbeat_ltspice]] 
-  * ADIsimPE files: [[ https://​minhaskamal.github.io/​DownGit/#/​home?​url=https://​github.com/​analogdevicesinc/​education_tools/​tree/​master/​m2k/​adisimpe/​heartbeat_adisimpe | heartbeat_adisimpe]] +  * ADIsimPE files: [[downgit>education_tools/​tree/​master/​m2k/​adisimpe/​heartbeat_adisimpe | heartbeat_adisimpe]] 
-  * Fritzing files: [[ https://​minhaskamal.github.io/​DownGit/#/​home?​url=https://​github.com/​analogdevicesinc/​education_tools/​tree/​master/​m2k/​fritzing/​heartbeat_bb | heartbeat_bb]]+  * Fritzing files: [[downgit>education_tools/​tree/​master/​m2k/​fritzing/​heartbeat_bb | heartbeat_bb]]
 </​WRAP>​ </​WRAP>​
  
 **Return to Lab Activity [[university:​courses:​electronics:​labs|Table of Contents]].** **Return to Lab Activity [[university:​courses:​electronics:​labs|Table of Contents]].**
university/courses/electronics/electronics-lab-heartbeat.txt · Last modified: 08 Sep 2020 04:45 by Alexanadre Robichaud