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参数资料
| 型号： | TA8106F |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 0.0105 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO16 |
| 封装： | SSOP-16 |
| 文件页数： | 3/9页 |
| 文件大小： | 779K |
| 代理商： | TA8106F |
TA8106F
2002-10-30
3
(2) Matrix converter
The matrix ratio is determined by the amplifier A1, A2, as
shown in Fig.4. Each of the output currents, which have a ratio
(1 : α), is formed by A1, A2.
The outputs of matrix converter, which are previously
mentioned, are
V(a) = L - αR
V(b) = - α (L + R)
V(c) = R - αL
These are applied to the drivers B1, C, B2.
(3) Muting function
As the terminal pin(3) for the muting fuction is connected to
VCC, Q1 is turned on, then Q2 and Q3 are turned on.
Therefore the DC voltage of the terminal pin(5) is down, and
all of the circuits stop. At this time, the quiescent supply
current (ICCQ) scarcely flows into this system. As the
terminal pin(3) is opened, the DC voltage of the terminal
pin(5) does not quickly come up, because of the presence of
the CR time-constant. So, the shock-noise is reduced. As
the supply voltage is turned on, this operation is also done.
(4) DC feed-back circuit
In this system, the output loads are directly connected to
the output terminals. Therefore, in order that the output DC
offset voltages are reduced, this system is built-in the DC
feed-back circuit. The currents, which are in proportion of
the differential voltage between two DC terminal voltages in
each
I1 = K (V(a) -V(b))
I2 = K (V(c) -V(b))
are fed into the matrix converter.
Thus the DC offset voltages are reduced. This system is
effective more than about 1.2V.
(5) Oscillation precaution
Small temperature coefficient and excellent frequency
characteristic is needed by capacitors below.
Oscillation preventing capacitors for power amplifier
output.
Capacitor between VCC and GND
(a)
(b)
(c)
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