STU2071B1 데이터 시트보기 (PDF) - STMicroelectronics

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STU2071B1

4B3T U INTERFACE CIRCUIT

STMicroelectronics 

Figure 5: Repeater Block Diagram.

STU2071

To line - NT side

A-wire

B-wire

HYBRID

UIC

LTrep

DOUT

DIN

CL

FR

DIN

DOUT

CL

FR

UIC

NTrep

XTAL2

CLOUT

15.36MHz 512KHz

CLOUT

512KHz

XTAL2

XTAL1

15.36MHz

VCO

15.36MHz

PHASE

COMPARATOR

AND LOOP

FILTER(*)

HYBRID

5V 0V

DC/DC

To line - LT side

A-wire

B-wire

PLL circuit

50mH

2.2µF

50mH

(*)1st order loop filter is sufficient (3dB frequency at 100Hz approx.)

2.2µF

D94TL099

7/18

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