Language Analysing Polygraph Circuit

Published:2011/7/20 3:52:00 Author:Joyce | Keyword: Language, Analysing, Polygraph | From:SeekIC

The signal of M1C1 is coupled to NE *, and signal RSSI output by feet 5 of logarithmic amplifiers IC1, IC1 is buffered by IC3-C of the op-amp LM324 to drive IC3-d, IC3-a, IC3-b to compose a detector for all wave crests. When output of IC3 = b is positive, the signal is integrated by R19 and C16. When language is stopped or the speaker is under great pressure, voltage of C16 will discharges through R18 and R19, for the time constant of C16 and R18, R19 is larger. It can make the bar chart DISP1 display signals which are increasing rapidly. During the suspension of language processing, a slow discharge will keep the value at display.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Basic_Circuit/Language_Analysing_Polygraph_Circuit.html

Print this Page | Comments | Reading(3)