The BU9253AS, BU9253FS and BU9255FS are
single-chip ICs that contain all the
components needed to configure a KARAOKE
echo system: an A / D and D / A converter,
SRAM, LPF, and mixer for mixing source signals.
With these ICs, an echo function can be configured
easily and with minimum external components.
Applications for portable stereo sets,
mini com KARAOKE functions
ponent stereo sets, video CDs and DVDs, etc.
Features ratio is adjustable with a DC voltag
1) Echo mixing
2) A second order LPF can be configured with the
internal amplifier and an attached capacitor and
resistor.
3) Delay time of 131ms. (when f CLK = 357kHz)
4) Internal mute function.
5) Single power supply (5V).
Measurement circuit (for BU9253FS / BU9255FS)
Application example (for BU9253FS / BU9255FS)
Setting the echo loop gain
FROM: Company Name: Aunytor Electronic (HK) Co.,Ltd
Contact Person: liao
Skype: Aunytor
Email: 2885745253@qq.com