SA572 Datasheet, PDF (9/12 Pages) NXP Semiconductors – Programmable analog compandor

Philips Semiconductors
Programmable analog compandor
Product specification
SA572
Basic Compandor System
The above basic compressor and expandor can be applied to
systems such as tape/disc noise reduction, digital audio, bucket
brigade delay lines. Additional system design techniques such as
bandlimiting, band splitting, pre-emphasis, de-emphasis and
equalization are easy to incorporate. The IC is a versatile functional
block to achieve a high performance audio system. Figure 9 shows
the system level diagram for reference.
1
2
V_{RMS COMPRESSION}
IN
3.0V
INPUT TO ∆G
AND RECT
2
REL LEVEL ABS LEVEL
EXPANDOR
OUT
dB
dBM
+29.54
+11.76
547.6MV
400MV
100MV
+14.77
+12.0
0.0
–3.00
–5.78
–17.78
10MV
–20
–37.78
1MV
100µV
10µV
Figure 9. SA572 System Level
–40
–57.78
–60
–77.78
–80
–97.78
SR00702
1998 Nov 03
9