VB
200k
4
205n
7
6
8
3k9
70n
A/D
CHANNEL 1
3
11
12
GA3214
(GA3224)
13n
REGULATOR
VC
A/D
INTERFACE
EEPROM
GA3214 / GA3224
OUT
S
D/A
HBRIDGE
13
LP FILTER
1
T
1k
CHANNEL 2
10
60n
A/D
9
5
2
All resistors in ohms, all capacitors in farads unless otherwise stated.
Figure 1: Test Circuit
VC
200k
VB
MS
4
205n
7
6
8
70n
A/D
REGULATOR
3
INTERFACE
EEPROM
11
12
GA3214
(GA3224)
13n
VC
A/D
CHANNEL 1
S
D/A
HBRIDGE
13
1
Knowles or Microtronic
zero-bias receiver
CHANNEL 2
10
60n
A/D
9
5
2
All resistors in ohms, all capacitors in farads unless otherwise stated.
Knowles or Microtronic microphones
Figure 2: Typical Application Circuit
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GENNUM CORPORATION
22736 - 3