Audio Signal Flow - Canon ELURA10 A Service Manual

3-4 Audio Signal Flow

MIC
IC701
L
C AMP
R
L L
R R
L
EXT.
R
MIC
L
HEAD
R
PHONE
L
AV
R
JACK
<MIC AMP> IC701
Processing is applied to output signal of microphone element C whereby it is mixed with L and R signals. The former nondirectional
microphone is thus changed to a stereo microphone having directivity
< AIF >IC801
Carries out switching between internal and external microphones (by means of serial data from MAIN MI-COM), plus ALC (Auto
Level Control), and amplification of each output signal.
Also, the shutter sound at card recording from the CAMERA MI-COM and the beep tone issued at ejection from the MAIN MI-
COM are added to the speaker output signal in AIF.
< A/D,D/A >IC802
Carries out analog - digital signal conversion. Sampling frequency is output from VIC2 and is Fs=32 KHz or Fs=48 KHz depend-
ing on the audio mode. Quantization bit number is 12 bits in case of 32 KHz or 16 bits in case of 48 KHz.
L
L
R
R
L L
R R
IC801
AIF
L+R
SPEAKER
CAMERA
SHUTTER
MI-COM
Fig. 2-7
2-10
CAHPTER 2. TECHNICAL DESCRIPTION
IC802
IC2301
A/D
VIC2
D/A
+
SPEAKER
-
AMP
BEEP LEV
BEEP 1
BEEP
CONT.
BEEP 2
Q803, 4
ELURA20 MC A, ELURA10 A
IC2000
VRP2
REC/PB
HEAD
MAIN MI-COM