亚博网站官网⎛⎝ycDHD⎠⎞ Shenzhen Electric Co., Ltd. and its solution to displacement sensor

爱博体育app

Website map

contact us

  • Shenzhen easie Electric Co., Ltd
  • Hotline: 137-2888-0902
  • Sales line: 0755-85271862
  • Fax: 0755-27083809
  • Email: info @ cn-opticfiber.com
  • Address: 5 / F, building 8, Honghai building, Hongxing community, Songgang street, Bao'an District, Shenzhen
  • website: http://cn-opticfiber.com

News Center

Grounding problem of displacement sensor and its solution

Release date: June 16, 2019 Hits: 89
In low level amplifier circuit, reasonable grounding is an important measure to reduce low noise interference, which must be paid special attention to.
When using a single power supply to supply multiple straight lines Displacement sensor If the voltage drop of the power supply must be reduced to the minimum, the high-end conductor of the power supply can also be connected in a similar way. There are multiple and multiple power supplies Displacement sensor Generally, no matter who supplies the power supply, the ground wire is collected to the common point, and then connected with the common terminal of the system. As shown in Figure 2, all the loads of power supply 1 return to the common terminal of power supply 1, and all loads of power supply 2 return to the common terminal of power supply 2. Finally, a thick wire is used to connect the common terminals. In a multi power system, it may be necessary to Conduct the judgment test, determine the grounding method, in order to achieve the best solution.
Digital ground wire usually has a lot of noise and high current peak. All analog common ground wire and digital common ground wire should be separated from each other, and then converge at one point. As shown in Figure 3, this grounding method minimizes the common impedance between analog and digital ground wires.
In addition to the DC and low-frequency grounding problems, there are also the coupling of rapidly changing AC voltage and the transient signal generated by the impedance of high-level circuit to low-voltage electronic circuit through common power supply and wiring. Another possible coupling way of this signal is that many internal and external compensated integrated operational amplifiers have no common ground point. If the reference point of integrator output is connected to the power supply end, the signal can be coupled to the power supply, The output will fluctuate with the power supply, which needs to be properly connected to the capacitor to bypass the high-frequency signal on the slower analog circuit, and the capacitor should be directly connected to the common point of low impedance from the power supply terminal of the amplifier.
Figure 4 shows such a method, which is applied to the decoupling of digital drive noise of digital to analog converter by analog output operational amplifier. If the bypass capacitor is connected directly between the two buses of the power supply at will, the bypass capacitor will not play its due role or even be harmful. It will provide a low impedance AC path for the noise from the "dirty" to the "clean" vs.

Online Service
share share
Copyright: Shenzhen easie Electric Co., Ltd. record No Yue ICP Bei No. 19052563 Network security No. 44030602003587 Technical support: Xinghai Internet