Digital surround sound reverb processor
[Outline
is a surround sound reverberation processing circuit, mainly for television, audio, karaoke OK reverb and other audio equipment. Built operational amplifier, VCO Voltage Control OSC, A / DC, D / AC, SRAM 40Kb and a delay time control circuit, It features built-in that simplifies external VCO circuit application and easy to control the oscillation frequency, so as to fine-tune the delay effect. In addition, ETK3699 only 16-pin, very few external components needed help simplified PCB layout and can be more cost effective.
Features
Operating voltage: 4.5V ~ 5.5V
automatic reset function
Low Noise: echo reverb mode -85dB; -90dB Surround mode
harmonic distortion rate: echo reverb mode THD <1%; Surround mode THD <0.2%
built-in 40Kb SRAM
by an external resistor to adjust the frequency of the VCO
ADM algorithm
used DIP16 or SOP16 package
Applications
player
TV
Kara OK reverberation
z electronic audio equipment