THAT4311 ETC, THAT4311 Datasheet - Page 5

• Manufacturer Part Number: THAT4311
• Description: Low-voltage/ Low-power Analog Engine Dynamics Processor
• Manufacturer: ETC

Rev. 08/30/01
Preliminary Information
Encoder
Fig 11. End-to-End Transfer Function, 1kHz
In
Fig 13. Encoder Transfer Function, 1kHz
10u
C16
3u3
200k
C2
Representative Data (Companding Noise Reduction)
+
R2
+
V+
V+
10
11
THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA
R1
200k
Vcc
Vee
THAT4311
Vref
U1E
Tel: [phone]; Fax: [phone]; Web: www.thatcorp.com
20
19
R13
2k
10n
C1
8k06
+
_
Vref
R3
Cap
U1D
THAT4311
18
9
8
+
Fig 15. THAT 4311 Noise Reduction Encoder Schematic
10u
C3
+
3u3
C4
Vref
+
15k
R5
C8
22u
Vref
17
51R
IN
R9
EC+
10u
VCA
C7
EC-
SYM
OUT
+
4
5
Vref
OUT
R8
TC
THAT4311
50k
U1B
RMS
270p
OA3
+
_
_
C5
THAT4311
U1A
30k
R6
Iset
+5
IN
12
20k
R7
1
2
Fig 14. Encoder Frequency Response 20-20kHz
+
C6
261k
10u
R12
6k19
R4
22kHz 3 pole BW filter
Fig 12. End-to-End THD+N
C10
4n7
4k32
R31
R11A
20k
Vref
6k19
R10
3
optional
U1C
+
THAT4311
_
OA2
R11B
10k
570p
C9
7
6
VR1
20k
Encoder
Out
Page 5