OptiSeal® Power Supply Circuit

Not all power supplies are the same. Often a minimum number of windings and transformers are employed to provide a minimal number of rectified voltages, which are then distributed throughout the device and regulated where needed, using a bunch of 10 pence each regulator chips.

Clearly in terms of cost economy this is a very good solution. However as now several sections all draw their power supply from the same common source and in effect "release" their noise pollution into this supply, noise cross contamination, ground loops and other problems accrue. Even with the most stringent and conscientious circuit design/layout, this noise pollution cannot completely be eliminated. Hence, is a major source of degraded sound quality.

Compared to the industry standard, in every AMR device, prior to the OptiReg®regulation or the OptiPower®supply filter circuit, every single functional block is evaluated with respect to its power supply requirements and is given its own raw power supply. This OptiSeal®power supply circuit means each section has a separate power supply and is not just dual-mono with completely independent supplies for each channel but also in other sections.

In the digital circuitry for the CD-77 Compact Disk Processor there is literally a separate power supply line (that is shared with no other section) for each functional block. Not only are the Clock Modules and DAC provided with their own separate power supply that is completely insulated from all others separate supplies, but so are the Digital Signal Processing, transport, control microprocessor etc.

This means each section has been galvanically sealed from the next to eliminate any noise however insignificant, in one section from polluting another section. This needs of course many separate windings on the transformer that have been galvanically sealed from one another, something which again needs to be paid for when compared to more standard approaches, as is the case for the many added rectifiers and power supply capacitors.


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