Integrated OCL power amplifier circuit composed of TDA2040

The integrated power amplifier TDA2040 (LC) can also form an OCL power amplifier ( OCL means a power amplifier without an output capacitor
). The circuit is shown in Figure 10-10, which uses ±16 V symmetrical dual power supplies as the operating voltage. Since the 0CL power amplifier uses
symmetrical positive and negative power supplies, there is no need for a bias circuit at the input end.
    The voltage gain of this circuit is determined by the code and Rz, and the amplification factor A=R3/R2. Cj and C5, C6 and C7 are the filter
capacitors of the positive and negative power supplies respectively.