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OwnerNicolas Girardinventor
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The invention concerns an online low frequency amplifying interface operating in automatic cutting feed, particularly designed for multimedia computers. It concerns a impedance adapting device produced around an electronic tube. It can be arranged between a source transmitting low frequency signals and a receiver. The invention is characterised in that it comprises an low frequency amplifier sub-part having high impedance at the source whereto it is connected, and having a low impedance at the receiver whereto it is connected next. The high voltage power supply of the anodes of the low frequency device is produced by a working high frequency automatic cutting feed regulator feeding a voltage amplifying device. The automatic cutting feed regulator operates in direct current low voltage. The inventive device is particularly designed for sound boards and for sources of hi-fi installations, whether incorporated or not.
Electronic tube amplifier device for amplifying audio signals circulating on a transmission line connecting a transmission device (2) to at least one receiving device (3), the device being inserted on the line between the transmission device (2) and the receiving device (3), characterised in that it includes an electronic tube amplifier module (6) with high input impedance and low output impedance coupled to a voltage booster stage (9) fed by a cutoff regulator module (8) whose frequency is greater than and outside the frequency band of the audio signal.
Computer sound card comprising a mother card (57), characterised in that it includes an amplifier module with an electronic tube (6) with a high input impedance and a low output impedance, and a voltage booster stage (9) coupled to a cut-off regulator module (8) also placed on the sound card and whose frequency is greater than and outside the frequency band of the audio signal, and in that the input and output of the amplifier module (6) are coupled to an analog communication bus (55), in that the input of the amplifier module (6) is also coupled to the output of an analog/digital converter (56) so as to convert into analog signals the digital signals proved by the mother card (57) of the computer, and in that the output of the amplifier module (6) is also coupled to an analog/digital converter (56) so as to provide the mother cards (57) of the computer with the signals obtained at the output of the amplifier module (6) in a digital form.
Dependencies are inferred from the claim text.