Philips TDA9605H Datasheet page 15

Philips Semiconductors
Audio processor with head amplifier for VHS hi-fi
handbook, full pagewidth
left channel audio:
output select
hi-fi
right channel audio:
output select
hi-fi
EOS • AFM
2
I C-bus
handbook, full pagewidth
registers
HID signal
HID period
ENVOUT
HF envelope
level meter
tracking level
display
1999 Apr 14
FULL-WAVE SQUARE ROOT
RECTIFIER COMPRESSION
FULL-WAVE SQUARE ROOT
RECTIFIER COMPRESSION
1.3 or 1.4 MHz carrier
1.7 or 1.8 MHz carrier
Fig.9 Functional diagram of the envelope output circuit.
EOS = 0 or AFM = 1
EOS = 1 and
AFM = 0
0
peak right
in period 1
peak left
in period 0
indication
Fig.10 Timing diagram of the envelope output signal.
t d
RESET
PEAK HOLD
RESET
PEAK HOLD
HF LEVEL DETECTOR
HF LEVEL DETECTOR
1 2
peak right
peak right
in period 1
in period 0
peak left
in period 1
left (period 0)
right (period 0)
15
SAMPLE
SAMPLE-
AND-HOLD
SAMPLE
AF
SAMPLE-
envelope
AND-HOLD
HF
envelope
test 10
3
peak right
in period 2
peak left
in period 2
left (period 1)
right (period 1)
Product specification
TDA9605H
RM
RMHID
HID
ENVOUT
EOS • AFM
MGR845
peak left
in period 3
left (period 2)
right (period 2)
MGR844