TA2123AF 查看數據表（PDF） - Toshiba

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TA2123AF

TOSHIBA Bipolar Integrated Circuit Silicon Monolithic

Toshiba 

TA2123AF

· Blank skip mode

The AMS SW is also turned of when the MT SW is turned off. And the comparator input level is

determined by external resistors (R4, R6) and capacitors (C3, C4) from mixer amplifier output

level.

The transfer function is as follows.

VO / Vi = R3 / [R1･R2 / (R1 + R2)] × {jωC4･R6 / [1 + jω (C3･R4 + C4･R4 + C4･R6) - ω2C3･C4･

R4･R6]}

VREF OUT

VREF OUT

Synchronizes with the MT SW

+

M−IX

COMP

12

C1 R1 AMS

IN

PRE OUT

C2 R2

14

AMS

MIX

13

15

AMS AMS

SW DET

R3 R4 C4

40

AMS

OUT R7

VREF OUT

VCC

Fig.2 AMS system

8

2002-10-30

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