Memphis MC 1   Discrete Solid State Moving Coil Phono Stage  
The new phono stage Memphis MC 1 is a discrete no-(global)feedback concept with BJTs only in the direct signal path. It comprises one single gain stage only to amplify the MC signal above line level. It is followed by a passive RIAA equalization and a subsequent emitter follower at the output (fig. 1). A step-up transformer elevates the MC signal close to MM level. The first stage is designed as a high gain transconductance amplifier. It injects the amplified audio signal current into the RIAA network as a frequency dependent load. The voltage across the load drops with ascending frequency according to the RIAA equalization curve.
Fig. 1: Simplified block diagram of the Memphis MC 1 phono stage
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