The intellectual digital voltmeter based on MSP430 one-chip computer is designed

  
Inside:
Repository
The voltage measurement is very general in electron technology at present, accuracy requirement and functional requirement for the instrument are higher and higher, especially under the situation that the signal power to be measured is with maximal phase difference, should guarantee the survey accuracy of the weak signal as well as measurement lim
The intellectual digital voltmeter based on MSP430 one-chip computer is designed - schematic

it to give consideration to strong signal, the automatic shelf digital voltmeter of intelligence of full-scale range becomes a kind of essential ge. CD4051 is 8 passways of digital control simulation electronic beam switches, 3 enter the control input A, B, c and INH to input two times, it is low to turn on impedance and very low closing at the leakage current. Amplitude can control the intersection of crest value and analog signal in 20V for digital signal of 4. 5-20V. Act as INH input end =  1 ³ When, all passways end. A passway in 8 passways of signal gating of the triad, this joinable input end is to export. Control the relation to be shown in Table 1. The voltage measurement is very general in electron technology at present, accuracy requirement and functional requirement for the instrument are higher and higher, especially under the situation that the signal power to be measured is with maximal phase difference, should guarantee the survey accuracy of the weak signal as well as measurement limit to give consideration to strong signal, the automatic shelf digital voltmeter of intelligence of full-scale range becomes a kind of essential ge. CD4051 is 8 passways of digital control simulation electronic beam switches, 3 enter the control input A, B, c and INH to input two times, it is low to turn on impedance and very low closing at the leakage current. Amplitude can control the intersection of crest value and analog...



Leave Comment

characters left:

New Circuits

.