V
B
200k
4
12
5
11
13
14
GB3211
(GB3221)
205n
70n
VC
A/D
REGULATOR
EEPROM
INTERFACE
7
9
13n
CHANNEL 1
CHANNEL 2
A/D
3k9
OUT
15
1
D/A
FRONTWAVE
A/D
S
LP FILTER
HBRIDGE
70n
60n
6
3k9
CHANNEL 3
CHANNEL 4
10
1k
8
2
3
All resistors in ohms, all capacitors in farads unless otherwise stated.
Figure 1: Test Circuit
V
B
22
47µ
MS2
MS
VC
200k(log)
12
5
11
13
14
4
GB3211
(GB3221)
205n
70n
13n
VC
A/D
INTERFACE
REGULATOR
EEPROM
7
9
CHANNEL 1
CHANNEL 2
A/D
15
1
D/A
FRONTWAVE
A/D
S
HBRIDGE
70n
60n
6
Knowles or Microtronic
zero-bias receiver
CHANNEL 3
CHANNEL 4
10
8
3
2
All resistors in ohms, all capacitors in farads unless otherwise stated.
Knowles or Microtronic microphones
Figure 2: Sample Application Circuit
5 of 7
GENNUM CORPORATION
20475 - 4
GENNUM [ GENNUM CORPORATION ]
