Abstract: This study presents a sources design and realization of the Electrocardiogram (ECG) amplifier whose output can be monitored in a Personal Computer (PC) or Laptop. The electrocardiogram is an electrical recording of the physiological health status of the human heart. The human skin surface generates electrical signals called biosignals or biopotentials, which have a low amplitude range of between 0.1-5 mv and a frequency range of 0.1-250 H₃. The electronic circuit chosen to implement this design is the instrumentation amplifier, a first order low pass and high pass filter. Two stainless electrodes will be incorporated in the design to obtain the biosignals from the skin, which serves as input to the electrocardiogram and a hardware interface will be incorporated in the design to link the circuit with any personal computer or Laptop.