參數(shù)資料
型號(hào): TA2123AF
廠商: Toshiba Corporation
英文描述: 1.5V Stereo Headphone Amplifier
中文描述: 1.5V的立體聲耳機(jī)放大器
文件頁數(shù): 12/20頁
文件大?。?/td> 427K
代理商: TA2123AF
TA2123AF
2002-10-30
12
(4) Treble boost
The EQ terminal is synchronizes with the BST SW, and the input impedance is changed.
BST OFF: 100k
(typ.)
BST ON: 1.9k
(typ.)
The voltage gain increase 6 dB (typ.) at high frequency range in case that the capacitor CX is connected
between the EQ terminal and the PW NF terminal.
Fig.6
Treble boost
(5) Cross talk of output coupling type
In case of output coupling mode, the cross talk is determined by resistor R
L
and capacitor C which are
connected with power amplifier output as shown in Fig.7.
The formula is shown below.
G (
ω
) = 1 / 2 [1 + j
ω
C (R
L
/ 2)]
CT = 20
og|G
v
| = 20
og [1 / 2 [
)
0
/
(
]],
ω
0
= 1 / C (R
L
/ 2)
At f = 1kHz, C1 = 220μF, R
L
= 32
, The cross talk becomes about 33 dB.
Fig.7
Cross talk of output coupling type
2
PW IN
PW NF
EQ
C
X
PW
A / B
+
28
29
30
PWA
PWC
PWB
R2
R
L
R
L
+
C
+
C
R
L
R
L
V
REF
~
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