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參數(shù)資料
| 型號(hào)： | THAT1420 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Balanced Line Drivers |
| 中文描述： | 平衡線驅(qū)動(dòng)器 |
| 文件頁(yè)數(shù)： | 4/8頁(yè) |
| 文件大?。?/td> | 120K |
| 代理商： | THAT1420 |
These equations can be solved much like standard
op-amp loop equations, and for the differential case,
we can see that (using superposition) resistor feed-
back results in
D
D
In
IN
OUT
(
)
13
23
and
D
D
IN
OUT
13
Substituting and simplifying into the equation that
defines differential operation yields
D
A
In
OUT
D
D
OUT
3
(
)
2
3
Dividing through by A
D
(assuming that A
D
>> 3) and
simplifying yields
D
In
OUT
2
as one would expect for a +6dB line driver.
The derivation for the common mode equation is
more complicated
1
in that it is dependent on the at-
tached load, and in any event doesn't yield much
insight into the device's operation.
In op-amp analysis or in the above derivation, the
combination of negative feedback and high open-loop
gain results in the open-loop gain "dropping out" of
the equation, and the differential inputs being forced
to the same potential. If we start with that assump-
tion, we can intuitively discern the operation of the
common-mode feedback loop as follows:
Referring again to Figures 2 and 3, the com-
mon-mode input actually senses the sum of the IC's
output currents by way of two 50 ohm resistors and
the bridge network (the 10pF capacitor simply limits
the maximum frequency at which this action occurs).
The resulting error signal is amplified and then
summed into both outputs, with the net effect being
to force the sum of the currents to be zero, and thus
the common mode output current to zero. Since this
is negative feedback, the common-mode loop can
raise the effective output impedance at audio fre-
quencies without the side effects of circuits that use
positive feedback to implement this function.
THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA
Tel: +1 (508) 478-9200; Fax: +1 (508) 478-0990; Web: www.thatcorp.com
Page 4
THAT1420/1430 Balanced Line Driver
Preliminary Information
Out-
Cap1
Cap2
Out+
Vcc
In+
Vee
Gnd
10k
10k
50
5k
5k
10k
10k
10k
10k
7k
7k
10p
50
THAT 1430
C
EXT
R
EXT
Din+
Cin+
Cin-
Din-
Dout-
Dout+
D
C
A
A
&
Figure 3. THAT 1430 Equivalent Circuit Diagram
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| THAT1430 | Balanced Line Drivers |
| THAT1510 | Low Noise, High Performance Microphone Preamplifier IC |
| THAT1512 | Low Noise, High Performance Microphone Preamplifier IC |
| THAT4311 | Low-voltage, Low-power Analog Engine?? Dynamics Processor |
| THCT12016 | INCREMENTAL ENCODER INTERFACE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| THAT1430 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Balanced Line Drivers |
| THAT1510 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Low Noise, High Performance Microphone Preamplifier IC |
| THAT1510P08-U | 制造商:THAT CORPORATION 功能描述:IC PRE-AMP MICROPHONE 1510 DIP8 制造商:THAT CORPORATION 功能描述:IC, PRE-AMP, MICROPHONE, 1510, DIP8 制造商:THAT CORPORATION 功能描述:IC, PRE-AMP, MICROPHONE, DIP-8; Audio Control Type:Microphone; Supply Voltage Range: 5V to 20V; Control Interface:-; Audio IC Case Style:DIP; No. of Pins:8; Operating Temperature Min:-40C; Operating Temperature Max:85C ;RoHS Compliant: Yes |
| THAT1510S08-U | 制造商:THAT CORPORATION 功能描述:PREAMP MICROPHONE SMD 1510 SO8 制造商:THAT CORPORATION 功能描述:PREAMP, MICROPHONE, SMD, 1510, SO8 制造商:THAT CORPORATION 功能描述:PREAMP, MICROPHONE, SMD, 1510, SO8; Supply Voltage Range: 5V to 20V; Audio IC Case Style:SOIC; No. of Pins:8; Operating Temperature Min:-40C; Operating Temperature Max:85C; Bandwidth:7MHz; Base Number:1510; Control / Process ;RoHS Compliant: Yes |
| THAT1510S14-U | 制造商:THAT CORPORATION 功能描述:PRE-AMP MICROPHONE 1510 SO-14 制造商:THAT CORPORATION 功能描述:PRE-AMP, MICROPHONE, 1510, SO-14 制造商:THAT CORPORATION 功能描述:PRE-AMP, MICROPHONE, 1510, SO-14; Supply Voltage Range: 5V to 20V; Audio IC Case Style:SOIC; No. of Pins:14; Operating Temperature Min:-40C; Operating Temperature Max:85C; Bandwidth:7MHz; Base Number:1510; Control / Process ;RoHS Compliant: Yes |
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