Filter
Top Products
1999 Apr 14 16
Philips Semiconductors Product specification
Audio processor with head amplifier for VHS hi-fi TDA9605H
Fig.11 HF envelope output (playback carrier level).
1.3 MHz (NTSC) or 1.4 MHz (PAL) at internal node between head
amplifier and HF AGC.
handbook, halfpage
0
5
1
2
3
4
MGR846
10
−1
11010
2
10
3
ENVOUT
output
voltage
(V)
left channel carrier amplitude (RMS value) (mV)
Fig.12 AF envelope output (audio peak level).
Bit LOH = 0.
handbook, halfpage
5
0
1
MGR847
2
3
4
−40 10−30 −20 −10 0
ENVOUT
output
voltage
(V)
LINEL and LINER output level (dBV)
Fig.13 AGC output of RF converter.
handbook, halfpage
MGR848
RF
converter
output
(dBV)
−3
−3
line output (dBV)
6.8 RF converter output
An AGC function is incorporated to avoid overmodulation
in the RF converter connected to pin RFCOUT. The AGC
limits the maximum signal level on the RF converter output
to −3 dBV (see Fig.13).
The RF converter output can be muted by setting
bit RFCM = 1. When using this RF converter mute, the
AGC control is reset by discharging the capacitor
connected to pin RFACG.