Table of Contents
Advertisement
8. MATRIX CIRCUIT
Fig.15-9 shows the matrix circuit.
The matrix circuit is to create a surround signal of (L-R) from
the Lch and Rch signals. According, if a monaural signal
enters, L-R=0, showing no surround effect exists.
Lch IN
REF
Rch IN
RD17
RD18
10K
10K
CD11
M2700P
M6800P
QD01
CD02
Buffer
1m50V (NP)
12
13
CD02
39K
CD03
39K
9
CD03
1m50V (NP)
10
RD19
QD01
10K
3
2
CD10
CD12
390P
9. FILTER CIRCUIT (ANTI-ALIAS
FILTER)
Fig. 15-10 shows the filter circuit.
The filter circuit is to cut frequencies higher than 7 kHz in
considering processing capacity of the DSP circuit (delay)
connected to next stage, and two stages of the filters are
employed in this unit.
14
RD13
39K
CD15
QD01
39K
5
6
RD14
39K
8
QD01
Buffer
Fig. 15-9
RD21
RD20
10K
10K
CD13
CD14
M2700P
M6800P
Fig. 15-10
117
Lch OUT
7
Surround OUT
(L-R)
CD16
33K
Rch OUT
RD22
10K
QD02
3
2
CD16
390P
Hide quick links:
Advertisement
Table of Contents
Troubleshooting
