Design and production of instrumental amplifier in blood pressure monitor

To detect the weak signal of the blood pressure measurement system,this author uses the instrumental amplifier which is as a pressure sensor pre-amplifier for discrete components.He also uses the Multsim to simulate the design of the instrumentation amplifier,and installs and commits the hardware circulation.When the input signal bandwidth is controlled within the 10 Hz～2 kHz and the potentiometer Rp is adjusted to make instrumentation amplifier up to 90 dB.The above tests show that the instrumentation amplifier indicators meet the requirements of blood pressure measurement system.