IN9270N 데이터 시트보기 (PDF) - Integral Corp.

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IN9270N

DTMF RECEIVER High-Performance Silicon-Gate CMOS

Integral Corp. 

( tGTP= (RPC) ln

) VCC

VCC - VTST

( ) tGTA = (R1 C) ln

VCC

VTST

RP =

R1 R2

R1 + R2

a) Descreasing tGTP ( tGTP < tGTA )

( tGTP= (R1C) ln

) VCC

VCC - VTST

( tGTA = (RPC) ln

) VCC

VTST

RP =

R1 R2

R1 + R2

b) Descreasing tGTA ( tGTP > tGTA )

Figure 4.Guard Time Adjustment

IN9270

Figure 5. Single Ended Input Configuration

7

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