United States Patent
US Patent 4236118: Stabilized remote sensing high fidelity apparatus
US 4236118 · granted 1980-11-25
Abstract
In a high-fidelity sound reproducing system wherein the speaker is located remotely from the amplifier and therefore the electrical signals reaching the speaker are subject to distortion from the capacitive and inductive reactance of the conductors joining the amplifier to the speaker, and further subject to pickup of hum and other forms of interference, the distortion of the signal is substantially eliminated by the use of a negative feedback network connected between the input terminal of the load and the input terminal of the amplifier and by a positive feedback network connected between the input terminal of the amplifier and the return terminal of the load, the feedback loops operating on the amplifier to alter its output in such a way that the signal applied at the terminals of the remote speaker more nearly resembles the signal applied as an output to the amplifier.
| Patent Number | 4236118 |
|---|---|
| Title | Stabilized remote sensing high fidelity apparatus |
| Filed | 1978-12-18 |
| Granted | 1980-11-25 |
| Inventor(s) | Turner; Wheeler M. |
| Number of Claims | 20 |
Abstract
In a high-fidelity sound reproducing system wherein the speaker is located remotely from the amplifier and therefore the electrical signals reaching the speaker are subject to distortion from the capacitive and inductive reactance of the conductors joining the amplifier to the speaker, and further subject to pickup of hum and other forms of interference, the distortion of the signal is substantially eliminated by the use of a negative feedback network connected between the input terminal of the load and the input terminal of the amplifier and by a positive feedback network connected between the input terminal of the amplifier and the return terminal of the load, the feedback loops operating on the amplifier to alter its output in such a way that the signal applied at the terminals of the remote speaker more nearly resembles the signal applied as an output to the amplifier.
Claim 1
An improved amplifier system for driving a remotely located load wherein it is desired that the amplified signal applied to the load be a high-fidelity reproduction of aninput signal, said system comprising: a load remotely located from the amplifier system and having an input terminal and a return terminal; an amplifier having an input terminal, and having an output terminal connected to the input terminal of the load, and having a return terminal connected to the return terminal of the load; a negative feedback network connected between the input terminal of the load and the input terminal of the amplifier, and applying to the input terminal of the amplifier a negative feedback signal related to the difference between the signalpresent at the input terminal of the load and a high fidelity reproduction of the input signal.
Claims
20 totalAn improved amplifier system for driving a remotely located load wherein it is desired that the amplified signal applied to the load be a high-fidelity reproduction of aninput signal, said system comprising: a load remotely located from the amplifier system and having an input terminal and a return terminal; an amplifier having an input terminal, and having an output terminal connected to the input terminal of the load, and having a return terminal connected to the return terminal of the load; a negative feedback network connected between the input terminal of the load and the input terminal of the amplifier, and applying to the input terminal of the amplifier a negative feedback signal related to the difference between the signalpresent at the input terminal of the load and a high fidelity reproduction of the input signal.