Photodiode AC amp, suppress DC

Photodiode AC signal amplifier. Designed to suppress DC component (ambient light) and express AC component (useful signal). R4 is for input balance, not for ambient light level adjustment. This circuit will adapt to ambient light automatically, just put together signal levels with R4. Unipolar power supply from 3V to 30V is available for shown LMx24 (4-in-1), LMx58 (2-in-1) and other similar opamp ICs. Recommened to use Schottky diodes like MBR0520 instead of this crap available for simulation. Anyway, simulation shows almost flat response from 80Hz to 50kHz.