Detecting circuit for heart sound pulse detection

Abstract

The invention relates to a detecting circuit for heart sound pulse detection. The detecting circuit comprises a pre-amplification circuit and an isolated output circuit, the pre-amplification circuit comprises a first operational amplifier, a second operational amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor and a second capacitor, and the isolated output circuit comprises a first integrated circuit, a second integrated circuit, a sixth resistor, a seventh resistor, an eighth resistor and a ninth resistor. According to the detecting circuit for heart sound and pulse detection, a double operation-amplification compensation form is adopted for the pre-amplification circuit, a compensation function is achieved for temperature drift of an operational amplifier, therefore, the long-term stability of the circuit can be enhanced, and the detecting reliability of the circuit is improved well. According to the isolated output circuit, detected signals and an internal detecting circuit can be isolated through the isolating function of the first integrated circuit, therefore, the reliability of the isolated output circuit is improved, and heart sound pulses are reliably detected.

Description

technical field [0001] The invention relates to the field of pulse detection circuits, in particular to a detection circuit for detecting heart sounds and pulses. Background technique [0002] With the continuous acceleration of urbanization in our country, various advanced intelligent products continue to appear, and with the wide application of various intelligent products in all walks of life, it has brought great help to people. [0003] In the field of existing medical equipment, when the heart sound and pulse are monitored in real time, because the detection circuit is easily disturbed by the external temperature, the signal is unstable and the stability of the detection circuit is reduced; not only that, when the detection , Often, the static electricity on the patient's body will cause a peak voltage inside the circuit, which will easily break down the internal circuit, causing damage to the circuit and reducing the reliability of the circuit. Contents of the inven...

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Problems solved by technology

[0003] In the field of existing medical equipment, when the heart sound and pulse are monitored in real time, because the detection circuit is easily disturbed by the external temperature, the signal is unstable and the stability of the detection circuit is reduced; not only that, when the detection , often because of the static electricity on the patient's body, the peak voltage is generated inside the circuit, which easily breaks down the internal circuit, causing damage to the circuit and reducing the reliability of the circuit

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