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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).
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BL0305 Digital Echo (Digital Delay)
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 VCC CLOCK REF OP2 IN OP2 OUT LPF2 IN LPF2 OUT
BL0305
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)
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Address
No.810, YiShan Road ShangHai China Tel
86-021-64850700 Fax
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86-64852222 Zip.200233
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BL0305 Digital Echo (Digital Delay)
Application KARAOKE, TV, VCR. Radio-Cassette Tape Recorder etc.
+ C3 0.01
C1 1 R2 16K R3 16K R4 30K C2 510p
C16 47 C15 0.1
1 LPF1 IN 2 LPF1 OUT 3 OP1 OUT
V CC CLOCK REF
14 13 12 11
+ R11* 47K C14 100p C13 47 C12 0.1 R9 16K R10 16K R8 16K C10 0.0022 + C8 1 C11 0.01
C5 0.1 C6 0.22 C7 0.22
4 OP1 IN 5 CC1 6 CC2 7 GND
BL0305
C4 1 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

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