參數(shù)資料
型號(hào)： 933821300112
廠商： NXP SEMICONDUCTORS
元件分類： 無(wú)繩電話/電話
英文描述： TELEPHONE SPEECH CKT, PDIP18
封裝： 0.300 INCH, PLASTIC, SOT-102, DIP-18
文件頁(yè)數(shù)： 8/29頁(yè)
文件大?。?/td> 231K
代理商： 933821300112
June 1990
16
Philips Semiconductors
Product specication
Low voltage versatile telephone
transmission circuit with dialler interface
TEA1067
Fig.11 Alternative microphone arrangements.
(a) Magnetic or dynamic microphone. The resistor marked (1) may be connected to decrease
the terminating impedance.
(b) Electret microphone.
(c) Piezoelectric microphone.
handbook, full pagewidth
MGR086
VEE
VCC
(1)
(a)
(b)
(c)
MIC
+
MIC
MIC
MIC
+
MIC
MIC
+
Fig.12 Alternative receiver arrangements.
(a) Dynamic earpiece with less than 450
impedance.
(b) Dynamic earpiece with more than 450
impedance.
(c) Magnetic earpiece with more than 450
impedance. The resistor marked (1) may be connected
to prevent distortion (inductive load).
(d) Piezoelectric earpiece. The resistor marked (2) is required to increase the phase margin
(capacitive load).
handbook, full pagewidth
MGR087
(1)
(2)
QR
QR
+
VEE
QR
QR
+
QR
QR
+
QR
QR
+
(a)
(b)
(c)
(d)
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