TEA0679 NXP Semiconductors, TEA0679 Datasheet - Page 10

• Manufacturer Part Number: TEA0679
• Description: I2c-bus Controlled dual Dolby* B-type Noise Reduction Circuit for Playback Applications
• Manufacturer: NXP Semiconductors

Philips Semiconductors
General note
It is recommended to switch off V
between tape and tape head while switching off.
AMS delay time
Table 1 AMS delay time set by resistor R
AMS threshold level
1998 Nov 12
I
reduction circuit for playback applications
(1) AMS threshold level for application circuit (see Fig.1).
(2) AMS threshold level for test circuit (see Fig.40).
2
C-bus controlled dual Dolby* B-type noise
RESISTOR VALUE R
1000
150
180
220
270
330
470
560
680
820
68
t
(k )
handbook, halfpage
AMS (P-M)
CC
(dB)
with a gradient of 400 V/s at maximum to avoid plops on tape in the event of contact
20
30
40
50
60
10
2
t
at pin TD
Fig.3 AMS threshold level.
DELAY TIME t
10
3
(1)
(2)
126
142
160
112
23
42
48
56
65
76
98
10
d
TYP. (ms)
10
4
f (Hz)
MHB119
10
5
TOLERANCE (%)
20
15
15
15
10
10
10
10
10
10
10
Product specification
TEA0679T