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RIAA phono equalizer amplifier circuit composed of OPA27
Source: InternetPublisher:拳制龙 Keywords: Amplifier Circuit Updated: 2024/09/09
The figure below shows an RIAA phono equalizer amplifier composed of OPA27. Rl~R3, Cl, and C2 in the negative feedback loop are used to form the three inflection point time constants of 3180, 318, and 75μs in the RIAA equalizer curve. The RC network selected by switch S1 at the output can filter out the shaking noise component of the turntable.
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