參數(shù)資料
型號(hào): TEA1085A
廠商: NXP SEMICONDUCTORS
元件分類: 通信及網(wǎng)絡(luò)
英文描述: Listening-in circuit for line-powered telephone sets
中文描述: SPECIALTY TELECOM CIRCUIT, PDIP24
封裝: 0.600 INCH, PLASTIC, DIP-24
文件頁數(shù): 13/32頁
文件大?。?/td> 199K
代理商: TEA1085A
March 1992
13
Philips Semiconductors
Preliminary specification
Listening-in circuit for line-powered
telephone sets
TEA1085; TEA1085A
Fig.10 Dynamic behaviour of Larsen limiter (in open-loop condition).
Where:
Change of receive gain
G
v
vo
---------
=
Nominal receive gain = 20 log G
vo
= 35 dB
handbook, full pagewidth
MGR039
VDTI
VLLC
slope Sli
slope Sla
tad
tLAr
0.5 V
1
0 V
listen-in mode
listen-in mode
Larsen mode
tLAa
0.63 V
handbook, full pagewidth
MGR040
VDTI
VDTI1
t1
T
VDTI
Fig.11 Definition of duty cycle k.
Where:
k
t
1
T
---
=
k
0.5
arc
---------------------------------------
V
-
sin
=
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