DG403AK883 datasheet(10/10 Pages) TEMIC

Part #	DG403AK883

Description	Low-Power, High-Speed CMOS Analog Switches

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Manufacturer	TEMIC [TEMIC Semiconductors]

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10 / 10 page

DG401/403/405

10

Siliconix

S-53748—Rev. E, 05-Jun-97

Applications (Cont’d)

Peak Detector:

A3 acting as a comparator provides the logic drive for

operating SW1. The output of A2 is fed back to A3 and

compared to the analog input ein. If ein > eout the output of

A3 is high keeping SW1 closed. This allows C1 to charge

up to the analog input voltage. When ein goes below eout A3

goes negative, turning SW1 off. The system will therefore

store the most positive analog input experienced.

A2

+

–

eout

+

–

A3

+

–

A1

ein

Reset

SW1

SW2

DG401

R1

C1

Figure 12. Positive Peak Detector

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