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參數(shù)資料
| 型號： | 935084920112 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | TELEPHONE SPEECH CKT, PDSO20 |
| 封裝： | PLASTIC, SOT-163, SO-20 |
| 文件頁數(shù)： | 4/38頁 |
| 文件大?。?/td> | 303K |
| 代理商： | 935084920112 |
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March 1994
12
Philips Semiconductors
Product specication
Low voltage versatile telephone transmission circuit
with dialler interface and transmit level dynamic limiting
TEA1064A
Fig.14 Maximum output swing on line as a function of the DC voltage drop VLN-SLPE with lline Ip as a parameter:
R15 = 392
; R16 = 56 ; or R15 = 0 and R16 = 392 + 56 = 448 .
handbook, full pagewidth
5.5
11
13
15
17
19
21
23
25
10
0
3
3.5
4
4.5
5
2
4
6
8
VLN(p-p)
(V)
VLN-VSLPE (V)
Iline-Ip
(mA)
MGR069
The internal threshold level is lowered automatically if the
DC current in the transmit output stage is insufficient. This
prevents distortion of the sending signal in applications
using parallel-connected telephones or telephones
operating over long lines, for example.
Dynamic limiting also considerably improves sidetone
performance in over-drive conditions (less distortion;
limited sidetone level).
Receiving amplier IR, QR
+, QR and GAR
The receiving amplifier has one input IR and two
complementary outputs, QR
+ (non-inverting) and QR
(inverting). These outputs may be used for single-ended or
differential drive, depending on the type and sensitivity of
the earpiece used (see Fig.15). Gain from IR to QR
+ is
typically 31 dB with R4 = 100 k
, sufficient for
low-impedance magnetic or dynamic earpieces which are
suitable for single-ended drive. By using both outputs
(differential drive) the gain is increased by 6 dB.
Differential drive can be used when the earpiece
impedance exceeds 450
as with high-impedance
dynamic, magnetic or piezo-electric earpieces.
Fig.15 Alternative receiver arrangements: a) dynamic earpiece with an impedance less than 450
; b) dynamic
earpiece with an impedance more than 450
; c) magnetic earpiece with an impedance more than 450 ,
resistor (1) may be connected to prevent distortion (inductive load); d) piezo-electric earpiece, resistor (2)
is required to increase the phase margin (stability with capacitive load).
handbook, full pagewidth
MGR070
(1)
QR
QR
+
5
4
VEE
11
QR
QR
+
5
4
QR
QR
+
5
4
(2)
QR
QR
+
5
4
(a)
(b)
(c)
(d)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 935084920118 | TELEPHONE SPEECH CKT, PDSO20 |
| 935084930112 | TELEPHONE SPEECH CKT, PDIP20 |
| 0672.400 | Circular Connector; MIL SPEC:MIL-C-26482, Series I, Solder; Body Material:Aluminum; Series:PT06; Number of Contacts:55; Connector Shell Size:22; Connecting Termination:Solder; Circular Shell Style:Straight Plug; Body Style:Straight |
| 0672.500 | Circular Connector; No. of Contacts:61; Series:; Body Material:Aluminum; Connecting Termination:Solder; Connector Shell Size:24; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:24-61 |
| 935085450112 | F/FAST SERIES, DUAL POSITIVE EDGE TRIGGERED D FLIP-FLOP, COMPLEMENTARY OUTPUT, PDSO14 |
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