CogniPower has developed and patented radical technology aimed primarily at improving power
supplies. A side benefit of this new technology is the ability to make fundamentally different
audio amplifiers which are more efficient and sound better than conventional amplifiers. The
improved efficiency is particularly valuable for any audio device that runs on batteries, because it
extends battery life.
Cell phones and tablet computers are known for crisp displays and horrible sound. Our audio
amplifiers can greatly improve both their efficiency and fidelity. The experience of watching a
movie on a tablet computer could be vastly better with good sound and longer battery life.
Furthermore, in noisy environments, like airplane cabins, sound energy can be harvested to
recharge the battery.
How is it possible? In a conventional audio amplifier, all the energy moves from the power supply
to the speaker. We draw some of the energy back from the speaker and reuse it, instead of
dissipating it as wasted heat. Two distinct new technologies are necessary to make that approach
practical, which is why it has not been done before. CogniPower holds fundamental, issued patents
on both those technologies. A predictive, bidirectional power converter drives the speaker directly,
eliminating the size and cost of extra power supplies. This bidirectional amplifier approach
actually makes a given speaker sound better, and enables the design of even more efficient
High fidelity speakers require enclosures which must damp resonances to avoid peaks and valleys
in the sound at different frequencies. The CogniPower audio amplifier removes those peaks and
valleys actively, by recovering energy. The conventional, passive damping methods that waste
power become unnecessary. Also, ceramic or electrostatic speakers are more efficient, but are hard
to drive using conventional amplifiers. The CogniPower amplifier can recover even more energy
from these types of speakers, for further efficiency improvements. Battery drain can be reduced by
a factor of five to ten compared to conventional efficient amplifiers.
These improvements are achieved via a rearrangement of the same circuit elements now employed
in conventional efficient audio amplifiers, with the addition of a novel means of control. Since
changing the control intelligence does not add to the cost of an integrated circuit, these benefits
can be realized without an increase in cost. System costs can be reduced because less waste heat
needs to be removed, and a smaller battery can perform the same job.
The same technology can be scaled for hearing aids, or consumer electronics, all the way up to
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