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參數(shù)資料
| 型號(hào)： | TEA1094A |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | Hands free IC |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PDIP24 |
| 封裝： | 0.600 INCH, PLASTIC, MO-015AD, SOT-101-1, DIP-24 |
| 文件頁數(shù)： | 10/28頁 |
| 文件大?。?/td> | 221K |
| 代理商： | TEA1094A |
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1996 Jul 15
10
Philips Semiconductors
Product specification
Hands free IC
TEA1094; TEA1094A
To determine the noise level, the signals on TENV and
RENV are buffered to TNOI and RNOI. These buffers have
a maximum source current of 1
μ
A and a maximum sink
current of 120
μ
A. Together with the capacitors C
TNOI
and
C
RNOI
, the timing can be set. In the basic application of
Fig.13 the value of both capacitors is 4.7
μ
F. At room
temperature, the 1
μ
A sourced current corresponds to a
maximum rise-slope of the noise envelope of
approximately 0.07 dB/ms.
This is small enough to track background noise and not to
be influenced by speech bursts. The 120
μ
A current that is
sunk corresponds to a maximum fall-slope of
approximately 8.5 dB/ms. However, during the decrease
of the signal envelope, the noise envelope tracks the
signal envelope so it will never fall faster than
approximately 0.7 dB/ms. The behaviour of the signal
envelope and noise envelope monitors is illustrated in
Fig.8.
Fig.7 Signal and noise envelope detectors.
handbook, full pagewidth
MGD223
LOG
28
(24)
27
(23)
26
(22)
25
(21)
24
(20)
23
(19)
LOG
from
microphone
amplifier
from
loudspeaker
amplifier
TSEN
RTSEN
CTSEN
CTENV
CTNOI
RRSEN
CRSEN
CRENV
CRNOI
TENV
TNOI
RSEN
RENV
RNOI
to logic
to logic
The pin numbers given in parenthesis refer to the TEA1094A.
handbook, full pagewidth
MBG354
INPUT SIGNAL
SIGNAL ENVELOPE
NOISE ENVELOPE
4 mV (RMS)
1 mV (RMS)
A
C
C
36 mV
36 mV
B
B
B
A
B
time
A: 85 dB/ms
B: 0.7 dB/ms
B: 0.7 dB/ms
C: 0.07 dB/ms
Fig.8 Signal and noise envelope waveforms.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TEA1094AM | Hands free IC |
| TEA1094AT | Hands free IC |
| TEA1094T | Hands free IC |
| TF218 | Capacitor Microphone Applications |
| TFMS4300 | Transient Voltage Suppressor Diodes |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TEA1094AM | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Hands free IC |
| TEA1094AT | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Hands free IC |
| TEA1094T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Hands free IC |
| TEA1095 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Voice switched speakerphone IC |
| TEA1095T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Voice switched speakerphone IC |
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