- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄384974 > THAT4311 (Electronic Theatre Controls, Inc.) Low-voltage, Low-power Analog Engine?? Dynamics Processor PDF資料下載
參數(shù)資料
| 型號(hào)： | THAT4311 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Low-voltage, Low-power Analog Engine?? Dynamics Processor |
| 中文描述： | 低電壓，低功耗模擬引擎？？動(dòng)態(tài)處理器 |
| 文件頁(yè)數(shù)： | 6/12頁(yè) |
| 文件大小： | 230K |
| 代理商： | THAT4311 |
Theory of Operation
The THAT 4311 Analog Engine
cessor combines THAT,s proven Voltage-Controlled
Amplifier (VCA) and RMS-Level Detector designs with
three opamps to produce a multipurpose dynamics
processor useful in a variety of applications. For de-
tails of the theory of operation of the VCA and RMS
Detector building blocks, the interested reader is re-
ferred to THAT Corporation’s data sheets on the
218x Series VCAs and the 2252 RMS-Level Detector.
Theory
of
the
interconnection
tially-controlled VCAs and log-responding level detec-
tors is covered in THAT Corporation’s application
note AN101, The Mathematics of Log-Based Dynamic
Processors.
Dynamics Pro-
of
exponen-
The VCA - in Brief
The THAT 4311 VCA is based on THAT Corpora-
tion’s highly successful complementary log/anti-log
gain cell topology, as used in THAT’s 218x and
215x-Series IC VCAs. The THAT 4311 is integrated
using a fully complementary, BiFET process.
combination of FETs with high-quality, complemen-
tary bipolar transistors (NPNs and PNPS) allows ad-
ditional flexibility in the design of the VCA over
previous efforts.
The
Input signals are currents to the VCA IN pin.
This pin is a virtual ground biased at VREF, so in
normal operation an input voltage is converted to in-
put current via an appropriately sized resistor (R5 in
Fig 2, Page 3). Because the current associated with
DC offsets relative to VREF present at the input pin
and any DC offset in preceding stages will be modu-
lated by gain changes (thereby becoming audible as
thumps), the input pin is normally AC-coupled (C4 in
Fig 2).
The VCA output signal is also a current, inverted
with respect to the input current. In normal opera-
tion, the output current is converted to a voltage via
inverter OA3, where the ratio of the conversion is de-
termined by the feedback resistor (R6, Fig 2) con-
nected between OA3’s output and its inverting input.
The signal path through the VCA and OA3 is
non-inverting.
The gain of the VCA is controlled by the voltage
applied between EC- and the combination of EC+
and SYM. Gain (in decibels) is proportional to EC-,
provided that EC+ and SYM are at VREF. The con-
stant of proportionality is -6.1mV/dB (for 5V sup-
plies) for the voltage at EC-, and 6.1mV/dB for the
voltage at EC+, and SYM
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 6
Low-voltage, Analog Engine
Dynamics Processor
Preliminary Information
IN
12
OUT
VCA
EC-
16
EC+
SYM
OA3
THAT4311
R4
7k5
Vref
U1A
Iset
THAT4311
2
TC
5
IN
1
OUT
4
RMS
U1B
Cap
8
Vee
THAT4311
10
Vref
9
Vcc
11
Vref
U1E
R5
24k3
R9
51R
R8
150k
R6
24k3
_
R11
15k
R12
261k
C1
3n3
C4
+
3u3
C5
10u
R7
20k
C6
10u
V+
C2
10u
C3
22u
Decoder In
Decoder Out
R1
6k04
+15
R2
56k
R3
8k87
C16
10u
18
19
20
OA1
+
U1D
THAT4311
C7
10u
13
14
15
17
+
+
+
+
+
+
+
_
Fig 16. THAT 4311 Noise Reduction Decoder Schematic
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| THCT12016 | INCREMENTAL ENCODER INTERFACE |
| THCT12016NL | INCREMENTAL ENCODER INTERFACE |
| THCT12024 | INCREMENTAL ENCODER INTERFACE |
| THCT12024NL | INCREMENTAL ENCODER INTERFACE |
| THCT4502B | DYNAMIC RAM CONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| THAUF4-X | 制造商:Panduit Corp 功能描述: |
| THB 10-1211 | 制造商:Traco Power 功能描述: |
| THB 10-1212 | 制造商:Traco Power 功能描述: |
| THB 10-1222 | 制造商:Traco Power 功能描述: |
| THB 10-1223 | 制造商:Traco Power 功能描述: |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。