TEA1095TS 데이터 시트보기 (PDF) - Philips Electronics

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TEA1095TS

Voice switched speakerphone IC

Philips Electronics 

Philips Semiconductors

Voice switched speakerphone IC

Product specification

TEA1095

handbook, full pagewidth

INPUT SIGNAL

4 mV (RMS)

1 mV (RMS)

MBG354

SIGNAL ENVELOPE

A

36 mV

B

A: 85 dB/ms

B: 0.7 dB/ms

A

B

NOISE ENVELOPE

C

B: 0.7 dB/ms

C: 0.07 dB/ms

36 mV

B

C

B

time

Fig.7 Signal and noise envelope waveforms.

handbook, full pagewidth

TENV

TNOI

ATTEN- 13 mV

UATOR

RENV

RNOI

13 mV

Vdt

MUTETX

DUPLEX CONTROLLER

LOGIC

IDT

Vref

RIDT

x x 1 1 − 10 µA

x 1 0 x + 10 µA

1 x 0 x + 10 µA

x x10

0

0 00 x

0

(note 1)

SWT

CSWT

MBG353

(1) When MUTETX = HIGH +10 µA is forced. When MUTERX = HIGH −10 µA is forced.

Fig.8 Decision logic.

1997 Nov 25

10

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