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November 1994

13

Philips Semiconductors

Product Specification

Speech and listening-in IC

TEA1096; TEA1096A

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Sidetone suppression: pins BAL1, BAL2,

OSP and ILS

Suppression of the microphone signal in the earpiece is

obtained by subtracting a part of this signal to a fraction of

the line signal (see Fig.12). For optimum suppression, the

voltage at the BAL inputs (BAL1 and BAL2) should be

equal to:

Z

SET

Z

line

To reach this requirement, an anti-sidetone network using

two impedances Z

BAL

and Z

LI'

is needed.

In the event of real impedances, the anti-sidetone network

is composed of resistors connected as shown in Fig.13.

V

BAL

0.5

×

-------------------------------

×

V

SOP

×

=

Where: R

LI'

=

α ×

R

line

and R

BAL

=

α ×

R

SET

;

where

α

is a scale factor allowing to have R

LI'

in the order

of 10 k

(DC biasing to V

ref

has to be ensured on BAL1

and BAL2).

In the event of complex impedances, the equivalent

network Z

s

, representing Z

line

, has to be transformed into

Z

p

in accordance with Fig.14.

The components of Z

p

, scaled by a factor

α

, are applied in

anti-sidetone network Z

LI'

. The complete anti-sidetone

network is shown in Fig.15.

相關(guān)PDF資料	PDF描述
TEA1096AT	Speech and listening-in IC
TEA1096T	Speech and listening-in IC
TEA1098A	Speech and handsfree IC
TEA1098AH	Speech and handsfree IC
TEA1098ATV	Speech and handsfree IC

相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
TEA1096AT	制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Speech and listening-in IC
TEA1096ATD-T	制造商:未知廠家制造商全稱:未知廠家功能描述:Telephone Speech Circuit
TEA1096T	制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Speech and listening-in IC
TEA1096TD-T	制造商:未知廠家制造商全稱:未知廠家功能描述:Telephone Speech Circuit
TEA1097	制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Speech and loudspeaker amplifier IC with auxiliary inputs/outputs and analog multiplexer

型號(hào)：	TEA1096A
廠商：	NXP SEMICONDUCTORS
元件分類：	無繩電話/電話
英文描述：	Speech and listening-in IC
中文描述：	TELEPHONE SPEECH CKT, PDIP28
封裝：	0.600 INCH, PLASTIC, DIP-28
文件頁數(shù)：	13/32頁
文件大小：	390K
代理商：	TEA1096A

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