Merging Anubis Premium, User Manual

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DUAL GAIN 32bit CIRCUITRY
While based on the extensive experience of Merging’s Horus and Hapi Preamp and AD converter
design, the Anubis engineered Dual Gain 32bit A/D circuitry takes Analog/Digital Conversion
design one step further. While using 2 A/D converter channels per input as, in the Horus & Hapi
design, those two A/D converters are not driven in parallel by a single Preamp stage but the
Anubis provides for two gain-ranged separate Analog front-ends, each driving its own A/D
converter channel. The signals out of each AD converter is then combined seamlessly in an
optimal way to both expand the headroom and lower the noise floor, providing huge dynamic
range with ample headroom. One main advantage of this topology is the considerable additional
freedom and safety implied by not having to spend much time and effort to adjust the input Gain
to maximize the program level range between input circuitry noise and clipping level of the A/D
converter. An important side benefit of that topology is also the total absence of any clicks when
adjusting the Preamp Gain steps, as those can be entirely processed in the digital domain.
Figure 4 Dual Gain Block Diagram