BL3208A/B 2048-Stage BBD Description The BL3208A/B is a 2048-stage low voltage operation, and low noise BBD variable delay line in audio frequency range. The device operates on +5V to +10V supply and provides a signal delay up to 102.4ms.The BL3208 contains 3208A and 3208B two classes. The only differences between them are the outlook and pin assignment. Pin Assignment GND OUT 2 CP1 IN OUT 1 BL3208A VGG CP 2 VDD DIP 8 PIN GND VGG CP 2 IN BL3208B OUT 1 CP 1 OUT 2 VDD DIP 8 PIN Features ● Adjustable audio signal delay time range: 10.24ms102.4ms ● ● ● ● ● ● ● Wide supply voltage range: 5V-10V Typical insertion loss: Li=0dB Wide dynamic range: S/N=71B(type) Low distortion: THD=2.5%(type) Clock frequency range: 10kHz-100kHz N-channel silicon gate process 8-pin plastic DIP for BL3208A, and 8-pin plastic DIP in outlook of 14-pin DIP for BL3208B Application ● Chorus, fading, vibrato and reverberation on effects of audio equipments. ● Sound effect of electronic musical instruments ● Variable or fixed time-delay circuit for analog signals. Address： No.810, YiShan Road ShangHai China Tel：86-021-64850700 Fax：86-64852222 Zip.200233 BL3208A/B 2048-Stage BBD Application Circuit 3208 VDD Input Bias Circuit Rs 5.6K 3.3µ Low Pass Filter f1<foff<fcp Attn>40dB/oct Out 100K BL3208 47µ CP1VGG 100K in 100K Low Pass Filter f1<foff<fcp Attn>40dB/oct 10K IN 3.3µ out1 out2 Clock Component Cancellation Circuit CP2 BL3102 Address： No.810, YiShan Road ShangHai China Tel：86-021-64850700 Fax：86-64852222 Zip.200233