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公开(公告)号：AU2003247621B2
公开(公告)日：2008-05-22
申请号：AU2003247621
申请日：2003-06-25
Applicant: SOMA NETWORKS INC
Inventor： BLODGETT JAMES R
Abstract: An apparatus and method for operating a feed-forward amplifier in which, after the signal-cancellation and intermodulation-cancellation loops have initially been nulled, the feed-forward amplifier is operated so that both loops are controlled so as to minimize intermodulation at the output of the feed-forward amplifier.
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公开(公告)号：AU2002323115B2
公开(公告)日：2008-11-20
申请号：AU2002323115
申请日：2002-08-12
Applicant: SOMA NETWORKS INC
Inventor： BLODGETT JAMES R
Abstract: A feed-forward amplifier having a signal cancellation loop including a cancellation node that includes a gain controller and a phase controller. Each controller provides a discrete tap steering signal and modulates the corresponding tap steering signal with a discrete tracer signal that takes on a preselected sequence of values. The sequence chosen so that the tracer signal is mutually orthogonal to each other tracer signal over a preselected period. A gain and phase adjuster connected to the outputs of the controllers provides a controlled gain change and phase shift in the signal cancellation loop, the magnitude of the gain change and phase shift controlled by the corresponding tap steering signals presented to the gain and phase adjuster by the controllers. A detector, the input of which is connected to the cancellation node and the output of which is connected to the controllers, outputs a measure of the envelope of the signal at the cancellation node. After the preselected period new values for the tap steering signals presented to the gain and phase adjuster by the controllers are obtained by multiplying detector output by the respective tracer signal, each over the respective preselected period, summing each resulting series of values, and changing the tap steering signals to be modulated and presented to the gain and phase adjuster in accordance with the values of the respective sums.
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公开(公告)号：AU2004306096A1
公开(公告)日：2005-04-07
申请号：AU2004306096
申请日：2004-09-21
Applicant: SOMA NETWORKS INC
Inventor： BLODGETT JAMES R
Abstract: An apparatus and method for providing an electrically adjustable RF delay in which a splitter splits an input signal into two signal paths, one signal path providing a delay fixed at an integral number of wavelengths of a desired center frequency and both signal paths providing electrically adjustable attenuation. A combiner combines the signals passing through the signal paths, such that the sum of the electrically-adjustable attenuation provided by the signal paths adds to unity, whereby the input signal is delayed by an adjustable time depending upon the attenuations provided by the signal paths.
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公开(公告)号：AU2002230426B2
公开(公告)日：2006-12-07
申请号：AU2002230426
申请日：2001-11-09
Applicant: SOMA NETWORKS INC
Inventor： BLODGETT JAMES R
IPC: H03F1/32
Abstract: The present invention provides a novel feed forward amplifier ("FFA") and a pilot tone generator-receiver therefor. In an embodiment of the invention, the feed forward amplifier only requires a single oscillator to operate both the pilot tone generator and pilot tone receiver used in conjunction with the amplifier circuitry of the FFA. In another embodiment of the invention, a method is provided of generating and detecting a pilot tone from a single oscillating signal.
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公开(公告)号：CA2527628A1
公开(公告)日：2003-12-31
申请号：CA2527628
申请日：2003-06-25
Applicant: SOMA NETWORKS INC
Inventor： BLODGETT JAMES R
Abstract: An apparatus and method for operating a feed-forward amplifier in which, aft er the signal-cancellation and intermodulation-cancellation loops have initiall y been nulled, the feed-forward amplifier is operated so that both loops are controlled so as to minimize intermodulation at the output of the feed-forwa rd amplifier.
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Patent Agency Ranking
公开(公告)号：AU3042602A
公开(公告)日：2002-06-03
申请号：AU3042602
申请日：2001-11-09
Applicant: SOMA NETWORKS INC
Inventor： BLODGETT JAMES R
IPC: H03F1/32
Abstract: The present invention provides a novel feed forward amplifier ("FFA") and a pilot tone generator-receiver therefor. In an embodiment of the invention, the feed forward amplifier only requires a single oscillator to operate both the pilot tone generator and pilot tone receiver used in conjunction with the amplifier circuitry of the FFA. In another embodiment of the invention, a method is provided of generating and detecting a pilot tone from a single oscillating signal.
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公开(公告)号：CA2436582A1
公开(公告)日：2002-05-30
申请号：CA2436582
申请日：2001-11-09
Applicant: SOMA NETWORKS INC
Inventor： BLODGETT JAMES R
Abstract: The present invention provides a novel feed forward amplifier ("FFA") and a pilot tone generator-receiver therefor. In an embodiment of the invention, t he feed forward amplifier only requires a single oscillator to operate both the pilot tone generator and pilot tone receiver used in conjunction with the amplifier circuitry of the FFA. In another embodiment of the invention, a method is provided of generating and detecting a pilot tone from a single oscillating signal.
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公开(公告)号：CA2538969C
公开(公告)日：2014-08-19
申请号：CA2538969
申请日：2004-09-21
Applicant: SOMA NETWORKS INC
Inventor： BLODGETT JAMES R
Abstract: An apparatus and method for providing an electrically adjustable RF delay in which a splitter splits an input signal into two signal paths, one signal path providing a delay fixed at an integral number of wavelengths of a desired center frequency and both signal paths providing electrically adjustable attenuation. A combiner combines the signals passing through the signal paths, such that the sum of the electrically-adjustable attenuation provided by the signal paths adds to unity, whereby the input signal is delayed by an adjustable time depending upon the attenuations provided by the signal paths.
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公开(公告)号：MXPA05000247A
公开(公告)日：2005-04-11
申请号：MXPA05000247
申请日：2003-06-25
Applicant: SOMA NETWORKS INC
Inventor： BLODGETT JAMES R
Abstract: Un aparato y un metodo para operar un amplificador de alimentacion directa, en el que, despues de que han sido anulados inicialmente los circuitos de cancelacion de senal y de cancelacion de intermodulacion, se opera el amplificador de alimentacion directa de manera que se controlen ambos circuitos a fin de reducir al minimo la intermodulacion en la salida del amplificador de alimentacion directa.
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公开(公告)号：CA2538969A1
公开(公告)日：2005-04-07
申请号：CA2538969
申请日：2004-09-21
Applicant: SOMA NETWORKS INC
Inventor： BLODGETT JAMES R
Abstract: An apparatus and method for providing an electrically adjustable RF delay in which a splitter splits an input signal into two signal paths, one signal pa th providing a delay fixed at an integral number of wavelengths of a desired center frequency and both signal paths providing electrically adjustable attenuation. A combiner combines the signals passing through the signal path s, such that the sum of the electrically-adjustable attenuation provided by the signal paths adds to unity, whereby the input signal is delayed by an adjustable time depending upon the attenuations provided by the signal paths .
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