BL0305 Digital Echo (Digital Delay)
Description
The BL0305 is a CMOS IC for generating echo to be added to the voice through a “karaoke” microphone. It
is designed for the lowest price of models in the same series,and is suitable for application to the echo
generator of a radio cassette player, minicomponent stereo set, TV etc. Increased master clock frequency
assures highperformance short delay, enabling the IC to be used for digital surround ( Compatible with
M65844P).
Pin Assignment
LPF1 IN
LPF1 OUT
OP1 OUT
OP1 IN
CC1
CC2
GND
1
2
3
4
5
6
7
14
13
12
11
10
9
8
V
CC
CLOCK
REF
OP2 IN
OP2 OUT
LPF2 IN
LPF2 OUT
DIP 14 Pin
Features
・All
functions necessary for generating
digital echo are contained, enabling
production of low-priced echo generator.
・C-R
oscillation circuit is provided for a master clock,
・Built-in
auto power-on reset circuit.
・No
control signal is required.
・Delay
time=150msec(with master clock set at 220 kHz)
・14-pin
DIP package.(14PDIP)
Address： No.810, YiShan Road ShangHai China Tel：86-021-64850700 Fax：86-64852222 Zip.200233
BL0305
BL0305 Digital Echo (Digital Delay)
Application
KARAOKE, TV, VCR. Radio-Cassette Tape Recorder etc.
+
C
3
0.01µ
C1
1µ
R2
16K
R3 16K
R4
30K C2
510p
C16
47µ
C15
0.1µ
1 LPF1 IN
2 LPF1 OUT
3 OP1 OUT
V
CC
CLOCK
REF
14
13
12
11
+
R11*
47K
C14
100p
C13
47µ
C12
0.1
µ
R9
16K
R10
16K
R8
16K
C10
0.0022µ
+
C8
1µ
C11
0.01
µ
C5
0.1
µ
C6
0.22µ
C7
0.22µ
4 OP1 IN
5 CC1
6 CC2
7 GND
BL0305
C4
1µ
VR1
50K
OP2 IN
OP2 OUT 10
LPF2 IN
9
LPF2 OUT 8
Address： No.810, YiShan Road ShangHai China Tel：86-021-64850700 Fax：86-64852222 Zip.200233
电子工程世界
