Circuit Debug filtering and amplification is performed on the input pulse signal

The 4 circuit debugging and noise analysis
Circuit Debug filtering and amplification is performed on the input pulse signal, the commissioning of effect is directly related to the accuracy of the data acquisition. Pass the test can see that there are serious noise Asus laptop battery in the pulse signal, pre-stage amplifier design is essential. Synthesized Signal Generator Electronics Co., Ltd. Ningbo CSI DFl405 digital to analog pulse signal, the signal frequency is higher, the notebook battery signal processing circuit for good attenuation of high-frequency signals (106 Hz) when the signal frequency, moderate when in accordance with the needs of the design.

signals can be amplified. 50 Hz notch filter frequency interference played a very good inhibition. By integration, the comparison circuit of the pulse signal shaping pulse signal microcontroller needs. Through the overall debugging, system to achieve the expected design requirements.
In the measurement process, the sensor to the pulse signal is very weak, compaq laptop battery and susceptible to external environmental interference, so the interference noise of the pulse sensor is required for analysis. Photoelectric pulse sensor measuring ambient light interference, electromagnetic interference, noise measurement process movement.

 In order to reduce the impact of ambient light pulse signal measurement, taking into account the ease of use to the sensor laptop battery sealed finger-style packaging, the entire medium and color of the shell is made of opaque minimize external ambient light impact. Electric signal containing pulse information obtained by photoelectric conversion are generally relatively weak and vulnerable to external electromagnetic signal interference, and therefore appropriate masking processing hardware circuit. Pulse signal changes slowly, Dell laptop battery are particularly vulnerable to the power frequency signal interference, the use of the notch filter to solve this problem effectively.