News Column

Patent Issued for Apparatus and Methods for Frequency Compensation of an Amplifier

July 16, 2014



By a News Reporter-Staff News Editor at Biotech Week -- A patent by the inventors D'Aquino, Stefano I. (Westford, MA); Tam, Kimo (Lincoln, MA); Handa, Yukihisa (Arlington, MA), filed on April 13, 2012, was published online on July 1, 2014, according to news reporting originating from Alexandria, Virginia, by NewsRx correspondents (see also Medical Device Companies).

Patent number 8766725 is assigned to Analog Devices, Inc. (Norwood, MA).

The following quote was obtained by the news editors from the background information supplied by the inventors: "Embodiments of the invention relate to electronic devices, and more particularly, to amplifiers.

"An amplifier can be included in an electronic system to amplify signals for transmission to an external device or for further processing within the system. The amplifier can receive an input signal and amplify the input signal to generate an output signal. To aid in improving the amplifier's overall performance, the amplifier can include multiple amplification stages. For example, the amplifier can include amplification stages cascaded to achieve a desired overall gain of the amplifier.

"Certain electronic systems use an amplifier in a closed-loop configuration. For example, an output of the amplifier can be electrically connected to an input of the amplifier to provide feedback. Connecting an amplifier in a feedback configuration can help improve gain stability, linearity, and/or other performance parameters of the amplifier relative to a configuration in which the amplifier is used open-loop.

"There is a need for amplifiers having improved performance. Furthermore, there is a need for amplifiers having improved performance in closed-loop implementations."

In addition to the background information obtained for this patent, NewsRx journalists also obtained the inventors' summary information for this patent: "In one embodiment, an integrated circuit (IC) includes an amplifier configured to amplify an input signal to generate an output signal. The amplifier includes a first inverting amplification block, a first compensation capacitor electrically connected between an input of the first inverting amplification block and an output of the first inverting amplification block, an output pad configured to receive the output signal from the amplifier, and a control pad configured to control a closed loop bandwidth of the amplifier. The control pad is separate from the input of the first inverting amplification block. The IC further includes a first switchable capacitor electrically connected between the input of the first inverting amplification block and the control pad. The first switchable capacitor is an explicit capacitor.

"In another embodiment, an amplifier includes an inverting amplification block, a compensation capacitor including a first end connected to an input of the inverting amplification block and a second end electrically connected to an output of the inverting amplification block, and a switchable capacitor including a first end electrically connected to the input of the inverting amplification block and a second end. The switchable capacitor is an explicit capacitor. The amplifier further includes a plurality of switches electrically connected to the second end of the switchable capacitor and a switch control block configured to control the plurality of switches based on a control signal. The switch control block is configured to electrically connect the second end of the switchable capacitor to a DC voltage source when the control signal is in a first state and to electrically connect the second end of the switchable capacitor to an output of the inverting amplification block when the control signal is in a second state."

URL and more information on this patent, see: D'Aquino, Stefano I.; Tam, Kimo; Handa, Yukihisa. Apparatus and Methods for Frequency Compensation of an Amplifier. U.S. Patent Number 8766725, filed April 13, 2012, and published online on July 1, 2014. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=8766725.PN.&OS=PN/8766725RS=PN/8766725

Keywords for this news article include: Analog Devices Inc., Medical Device Companies.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Biotech Week


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