Dear Forum Members,
I am using LM1876 chip conjunction with LM1036 tone/volume IC (with capacitive coupling). Both MUTE and STDBY
functions are utilized. When the '1876 goes to Standby mode or mute activated no any click/pop but if '1876 leaves standby
or mute switched off (output activated) it produces a pop. Its audio inputs are unchanged during these procedures. It should also be noted when supply applied to the amplifier no any pop (on-chip undervoltage protection also works fine), so there is a problem with only logic control and only in "one direction" (activation). Logic control provided by a PCF8574 I/O expander using 2K pullups on MUTE and STDBY lines.
It would be grateful if somebody - who already has experience with this IC - could give me advise to fix the problem.
Thanks vm in advance!