Filter and amplifier circuit
As shown in Figure 4, the circuit consists of filtering and amplification. Among them, MAX267 is an integrated filter produced by MAXIM, which can form a variety of low-pass, band-pass, high-pass, etc., flexible use, performance is far superior to the use of integrated op amp filter circuit.
Figure 4 filter and amplifier circuit
MAX4471 is a low power amplifier of MAXIM company. MAX9028 is a low power comparator of MAXIM. The filter circuit uses MAX267 to form a band-pass filter (allowing signals from 0.8 to 38 Hz to pass through), filtering out the DC component and power supply in the signal, as well as high-frequency noise and power frequency interference caused by skin and cuff friction, and then further amplified by MAX4471. Get the voltage signal matched by the single chip, enter ADC2, and monitor the AC component of blood pressure. At the same time, this signal is converted into a pulse signal by the low-power comparator MAX9028, triggering ADC1 to work.
Pcb Circuit Boards are widely used in automotive electronics, including power control systems, safety control systems, body electronics systems, and communications.
In the future, automotive electronics will move toward the trend of big functions, namely: mobile communications, multimedia leisure, safe driving assistance (including automatic driving), ride comfort, energy saving (including electric vehicles), protection and preservation, all of which pose challenges to the PCB industry. At the same time, it also provides good development opportunities. For example, autonomous driving will bring large-scale applications of millimeter-wave radar, so the demand for high-frequency PCB boards for radars will be significantly increased, and the value is significantly higher than traditional PCB boards; BMS in electric vehicles is one of the core components. PCB board is one of the basic components of BMS and will benefit from the development of electric vehicles.
Pcb Car,Automotive Pcb Circuit Board,Circuit Board Pcb For Automotive ,Circuit Pcb For Automotive
Chuangying Electronics Co.,Ltd , https://www.cwpcb.com