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LMV393M Datasheet(PDF) 14 Page - Texas Instruments |
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LMV393M Datasheet(HTML) 14 Page - Texas Instruments |
14 / 32 page LMV331-N, LMV339-N, LMV393-N SNOS018G – AUGUST 1999 – REVISED FEBRUARY 2013 www.ti.com (20) (21) POSITIVE PEAK DETECTOR Positive peak detector is basically the comparator operated as a unit gain follower with a large holding capacitor from the output to ground. Additional transistor is added to the output to provide a low impedance current source. When the output of the comparator goes high, current is passed through the transistor to charge up the capacitor. The only discharge path will be the 1 M Ω resistor shunting C1 and any load that is connected to the output. The decay time can be altered simply by changing the 1 M Ω resistor. The output should be used through a high impedance follower to a avoid loading the output of the peak detector. Figure 19. Positive Peak Detector NEGATIVE PEAK DETECTOR For the negative detector, the output transistor of the comparator acts as a low impedance current sink. The only discharge path will be the 1 M Ω resistor and any load impedance used. Decay time is changed by varying the 1 M Ω resistor. Figure 20. Negative Peak Detector DRIVING CMOS AND TTL The comparator's output is capable of driving CMOS and TTL Logic circuits. 14 Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: LMV331-N LMV339-N LMV393-N |
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