I have a single supply quad Opamp and the four Opamps are doing ampliflication and filtering in the circuit. All of them are biased to +VCC/2. Can I use just ONE voltage divider (2 resistors) to bias all four opamps at their +ve terminals? Or should I have separate voltage divider for each of them? See, I can save both resistors and PCB space if I can do that. The four Opamps are AC coupled in my circuit. Does coupling make a difference? I wish someone can answer my question.