Patents by Inventor Marc Goldfarb
Marc Goldfarb has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8571511Abstract: Apparatus and methods of manufacture for a wideband RF mixer are provided. The RF mixer includes an input, an LO input, and an output. A variable impedance tuner is disposed in an input signal path between the input port and the RF mixer, and a variable impedance tuner is disposed in an output signal path between the output and the RF mixer. The impedances of the variable impedance tuners are controllable for a particular frequency of operation with one or more digital or analog control signals.Type: GrantFiled: June 10, 2011Date of Patent: October 29, 2013Assignee: Analog Devices, Inc.Inventor: Marc Goldfarb
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Publication number: 20120314811Abstract: Apparatus and methods of manufacture for a wideband RF mixer are provided. The RF mixer includes an input, an LO input, and an output. A variable impedance tuner is disposed in an input signal path between the input port and the RF mixer, and a variable impedance tuner is disposed in an output signal path between the output and the RF mixer. The impedances of the variable impedance tuners are controllable for a particular frequency of operation with one or more digital or analog control signals.Type: ApplicationFiled: June 10, 2011Publication date: December 13, 2012Applicant: Analog Devices, Inc.Inventor: Marc Goldfarb
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Patent number: 8324966Abstract: Apparatus and methods for electronic amplification are provided. In one embodiment, a method includes providing a first differential amplification block, providing a second differential amplification block, electrically connecting the first and second differential amplification blocks in a stack between a first voltage reference and a second voltage reference, amplifying a first signal using the first differential amplification block, and amplifying a second signal using the second differential amplification block. A voltage difference between the first and second voltage references defines a power supply voltage, and the first differential amplification block operates over a first range of the power supply voltage and the second differential amplification block operates over a second range of the power supply voltage.Type: GrantFiled: March 28, 2011Date of Patent: December 4, 2012Assignee: Analog Devices, Inc.Inventor: Marc Goldfarb
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Publication number: 20120249242Abstract: Apparatus and methods for electronic amplification are provided. In one embodiment, a method includes providing a first differential amplification block, providing a second differential amplification block, electrically connecting the first and second differential amplification blocks in a stack between a first voltage reference and a second voltage reference, amplifying a first signal using the first differential amplification block, and amplifying a second signal using the second differential amplification block. A voltage difference between the first and second voltage references defines a power supply voltage, and the first differential amplification block operates over a first range of the power supply voltage and the second differential amplification block operates over a second range of the power supply voltage.Type: ApplicationFiled: March 28, 2011Publication date: October 4, 2012Applicant: Analog Devices, Inc.Inventor: Marc Goldfarb
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Patent number: 8179196Abstract: Methods and apparatus for amplifying signals over a wide frequency range to generate high voltage outputs feature a pair of switching modules which are connected in series. Switching modules, e.g., field-effect transistors (FETs), operate based on the voltage difference between an amplified signal and a fixed DC signal at two of their terminals, thereby generating an output waveform that has peak-to-peak voltage higher than, e.g. twice, the breakdown voltage of the transistors within the amplifier. The DC signals applied at the switching modules may be varied using an AC signal to improve the risetime of the output waveform and achieve a faster operational speed of the amplifier.Type: GrantFiled: May 28, 2009Date of Patent: May 15, 2012Assignee: Analog Devices, Inc.Inventor: Marc Goldfarb
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Patent number: 7944307Abstract: A device for amplifying signals over a wide frequency range features stacked amplifying modules connected between a DC voltage source and an electrical ground. The stacking configuration reuses the DC current produced the voltage source, and thus reduces the amount of operational DC current permitting the use of lower voltage, higher frequency devices to be used. The amplifying modules are fed signals which are different versions of an input signal, and the output signals are AC coupled using capacitors to balance out gain imbalances and asymmetries between the amplifying modules.Type: GrantFiled: March 19, 2009Date of Patent: May 17, 2011Assignee: Analog Devices, Inc.Inventors: Marc Goldfarb, Edmund J. Balboni
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Publication number: 20100301943Abstract: Methods and apparatus for amplifying signals over a wide frequency range to generate high voltage outputs feature a pair of switching modules which are connected in series. Switching modules, e.g., field-effect transistors (FETs), operate based on the voltage difference between an amplified signal and a fixed DC signal at two of their terminals, thereby generating an output waveform that has peak-to-peak voltage higher than, e.g. twice, the breakdown voltage of the transistors within the amplifier. The DC signals applied at the switching modules may be varied using an AC signal to improve the risetime of the output waveform and achieve a faster operational speed of the amplifier.Type: ApplicationFiled: May 28, 2009Publication date: December 2, 2010Applicant: Analog Devices Inc.Inventor: Marc Goldfarb
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Publication number: 20100237941Abstract: A device for amplifying signals over a wide frequency range features stacked amplifying modules connected between a DC voltage source and an electrical ground. The stacking configuration reuses the DC current produced the voltage source, and thus reduces the amount of operational DC current permitting the use of lower voltage, higher frequency devices to be used. The amplifying modules are fed signals which are different versions of an input signal, and the output signals are AC coupled using capacitors to balance out gain imbalances and asymmetries between the amplifying modules.Type: ApplicationFiled: March 19, 2009Publication date: September 23, 2010Inventors: Marc Goldfarb, Edmund J. Balboni
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Publication number: 20050231240Abstract: Reference signal generators are provided that automatically adjusts a reference signal's amplitude when that signal is delivered into system loads having unknown capacitances. The amplitude is preferably initiated at a maximum amplitude to insure operation of system elements that require the reference signal. It is subsequently adjusted downward to a controlled reference amplitude which is predetermined to be an amplitude sufficient to sustain proper operation of the system elements but sufficiently reduced to minimize the spurious signals typically generated by fast high-level current transitions. In addition, the reduction to the controlled amplitude reduces the system current drain. The level control is realized in a buffer amplifier so that the amplitude level of an oscillator signal can be set independently to maximize its signal-to-noise performance. Accordingly, requirements for the reference amplitude do not compromise requirements for the amplitude level of the oscillator signal.Type: ApplicationFiled: April 15, 2004Publication date: October 20, 2005Inventors: Marc Goldfarb, Edmund Balboni
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Patent number: 6400227Abstract: A variable gain amplifier has at least two branches connected in parallel to drive a common output load. Each branch includes at least two FETs in a cascode configuration. A first FET in each branch is arranged to receive an input signal and to amplify the signal in a common source configuration; the second FET is arranged in a common gate configuration with its source receiving the output current of the first FET. The gate of the second FET is coupled to a corresponding gain control input so that the second FET is enabled when the gate receives an enabling gain control signal and disabled otherwise. Preferably the first and second FETs in each branch are biased in a saturation region of operation when the second FET is enabled by the gain control input. This maintains a low distortion figure throughout the dynamic range of the gain control. Preferably, the invention also includes an active fixed gain power amplification stage for coupling the output to a power amplifier.Type: GrantFiled: May 31, 2001Date of Patent: June 4, 2002Assignee: Analog Devices, Inc.Inventors: Marc Goldfarb, Rosamaria Croughwell, Peter Katzin