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| Number | Title | Issue Date |
| 7852152 | Norder tunable low-pass continuous time filter for fiber optic receivers According to one embodiment of the invention, a circuit comprising a plurality of operational transconductance amplifiers (OTAS) is described. The first OTA has differential input and differential output. The second OTA also has differential input, where a first out... | 12/14/2010 |
| 7733173 | Unilateral feedback power amplifier and method for realizing the same A unilateral feedback power amplifier utilizes new feedback techniques and devices to make the amplified high-frequency signal unilateral, let the output power, power gain and impedance matching simultaneously accomplish the optimal values, and enhance the stability... | 06/08/2010 |
| 7696820 | Increasing amplifier bandwidth by positive capacitive feedback An amplifier circuit includes first, second, and third amplifiers each having an input and an output. The amplifier circuit further includes first and second capacitances and a resistance. The input of the second amplifier communicates with the output of the first a... | 04/13/2010 |
| 7688134 | Transimpedance amplifier The present invention solves characteristic deterioration caused by peaking and a ground inductance, and provides a transimpedance amplifier capable of achieving a higher gain and a wider band. For this purpose, the transimpedance amplifier is configured to include ... | 03/30/2010 |
| 7605650 | Switched capacitor amplifier with higher gain and improved closed-loop gain accuracy A switched capacitor CMOS amplifier uses a first stage non-inverting CMOS amplifier driving a second stage inverting CMOS amplifier. The first stage amplifier is provided with positive feedback to substantially increase the gain of the first stage amplifier. In the ... | 10/20/2009 |
| 7439802 | Unilateral feedback power amplifier and method for realizing the same A unilateral feedback power amplifier utilizes new feedback techniques and devices to make the amplified high-frequency signal unilateral, let the output power, power gain and impedance matching simultaneously accomplish the optimal values, and enhance the stability... | 10/21/2008 |
| 7423489 | Low return loss resistive feedback amplifier Embodiments related to resistive feedback amplifiers are presented herein. ... | 09/09/2008 |
| 7423483 | Increasing amplifier bandwidth by positive capacitive feedback An amplifier circuit includes a first amplifier having an input and an output, and a second amplifier having an input that communicates with the output of the first amplifier, and an output. The amplifier circuit includes a first capacitance that communicates with t... | 09/09/2008 |
| 7403068 | Method for double sampling loop negative feedback and double sampling negative feedback amplifier A method for double sampling loop negative feedback comprising: obtaining a low-frequency feedback signal from the output of the amplifier; obtaining a high-frequency feedback signal from part of the amplifier of which high-frequency phase shift is low, wherein two-... | 07/22/2008 |
| 7403067 | Compensation circuit for amplifiers having multiple stages An amplifier circuit comprises a first capacitance having one end that communicates with an input of a first amplifier stage. An amplifier has a first gain, an input that communicates with an opposite end of the first capacitance, and an output. A second capacitance... | 07/22/2008 |
| 7340226 | Cartesian loop transmitter and method of adjusting an output level of such transmitter In accordance with the present invention there is those provided a Cartesian loop transmitter having an isolator eliminator circuitry comprising a set of low pass and band pass filters for each of an I- and Q-channels, root mean square detectors and a divider connec... | 03/04/2008 |
| 7318654 | Headset incorporating an integral light A headset with a light incorporated within is disclosed. A representative embodiment of the invention may be construed as an aviation-style headset that includes a first earcup and a second earcup each comprising active noise reduction (ANR) circuitry, a headband in... | 01/15/2008 |
| 7292098 | Operational amplifier An operational amplifier is described. The operational amplifier includes a first stage, a second stage, a third stage, and a fourth stage. The amplifier includes a nested transconductance-capacitance compensation configuration. The third stage includes class AB con... | 11/06/2007 |
| 7289633 | System and method for integral transference of acoustical events A sound system for capturing and reproducing sounds produced by a plurality of sound sources. The system comprises a device for receiving sounds produced by the plurality of sound sources and converting the separately received sounds to a plurality of separate audio... | 10/30/2007 |
| 7283840 | Reconfigurable analog baseband for a single-chip dual-mode transceiver A dual-mode analog baseband circuit is implementable on a single IC with reduced chip area. The baseband portion of the IC includes a single dual-mode complex filter that is reconfigurable to be a filter for Bluetooth signals or for wireless local area network (wire... | 10/16/2007 |
| 7271660 | Selectively adding auxiliary frequency compensation depending on the behaviour of an output transistor of a rail-to-rail operational amplifier A frequency compensation device for providing added compensation to an operational amplifier, such as a bipolar or MOS rail-to-rail output operational amplifier, when the output device of the operational amplifier is in saturation. The device comprises a detector ci... | 09/18/2007 |
| 7266159 | Frequency-dependent magnitude pre-distortion on non-baseband input signals for reducing spurious emissions in communication networks Pre-distortion, whose magnitude—and preferably phase—are frequency-dependent, is applied to a non-baseband input signal in order to reduce spurious emissions resulting from subsequent amplification of the signal. In preferred embodiments, the pre-distortion tech... | 09/04/2007 |
| 7253680 | Amplifier system with current-mode servo feedback A system and method for compensating an amplifier apparatus for low frequency and/or DC components of an externally applied input signal as well as for any voltage offsets contributed by the amplifier circuitry. Band-limited servo feedback is applied to predetermine... | 08/07/2007 |
| 7251293 | Digital pre-distortion for the linearization of power amplifiers with asymmetrical characteristics An input signal is pre-distorted to reduce spurious emissions resulting from subsequent signal amplification. Frequency-dependent pre-distortion is preferably implemented in combination with frequency-independent pre-distortion, where the frequency-dependent pre-dis... | 07/31/2007 |
| 7248642 | Frequency-dependent phase pre-distortion for reducing spurious emissions in communication networks A frequency-dependent phase pre-distortion technique is applied to an input signal in order to reduce spurious emissions resulting from subsequent amplification of the signal. In preferred embodiments, the frequency-dependent phase pre-distortion of the present inve... | 07/24/2007 |
| 7230483 | Negative feedback system with an error compensation scheme A negative feedback system includes a first summation module for receiving a system input and outputting a first summation output. A first forward module is coupled to the first summation module for receiving the first summation output and outputting a first forward... | 06/12/2007 |
| 7215766 | Headset with auxiliary input jack(s) for cell phone and/or other devices Headsets are used in variety of applications to facilitate one- or two-way audio communications between users and/or devices. The present inventor recognized that conventional headsets lack means for successfully integrating more than one audio source, despite their... | 05/08/2007 |
| 7215191 | Device for amplitude adjustment and rectification made with MOS technology An amplitude adjustment device such as an amplitude compression device and amplitude expansion device is basically configured by a PWM modulator, a demodulator and an amplitude detector. Herein, the PWM modulator effects pulse-width modulation on an input signal to ... | 05/08/2007 |
| 7209004 | DB-linear variable gain amplifier (VGA) stage with a high broad band The invention relates to a VGA stage having a novel circuit configuration for amplifying/attenuating a differential input signal which is transmitted via a transmission line (H). The VGA stage comprises an operational amplifier (OPV1, OPV2), which is c... | 04/24/2007 |
| 7209007 | Combined analog signal gain controller and equalizer An analog signal gain controller and equalizer with an increased signal bandwidth for reducing intersymbol interference (ISI) within a digital data signal. ... | 04/24/2007 |
| 7197085 | Frequency-dependent magnitude pre-distortion for reducing spurious emissions in communication networks Pre-distortion, whose magnitude—and preferably phase—are frequency-dependent, is applied to an input signal in order to reduce spurious emissions resulting from subsequent amplification of the signal. In preferred embodiments, the pre-distortion technique of the... | 03/27/2007 |
| 7196574 | Active polyphase ladder filters with transmission zeros and their synthesis method Direct incorporation of transmission zeros into a continuous-time active complex BP filter transfer function yields a filter having much sharper roll-off than that of an all-pole filter. The ladder filter is constructed using transconductors and capacitors only. The... | 03/27/2007 |
| 7184737 | Image-rejection I/Q demodulators In a communications receiver for quadrature demodulation, a feedback technique for reducing the image response of the receiver. The communications receiver includes an I demodulator and a Q demodulator. A local oscillator (LO) signal is provided by a PLL to a quadra... | 02/27/2007 |
| 7183842 | Optimum composite cascode amplifier An improved amplifier circuit which effectively combines two amplifier stages by utilizing two nested feedback loops so that an inverting amplifier topology is used with a FET input device, operating as a common source/emitter configuration cascoded by the inverting... | 02/27/2007 |
| 7184099 | Controllable signal baseline and frequency emphasis circuit A circuit for selectively controlling signal baseline and frequency emphasis. An amplifier with selectively controllable feedback circuitry allows higher frequency components of a signal to be emphasized over lower frequency components while also allowing control ov... | 02/27/2007 |
| 7180950 | Low-noise feedback cancellation filter for enhanced common-mode rejection and noise immunity A circuit is connected between a module and a pair of wires. The circuit includes a first connection line, a second connection line, radio frequency termination circuitry, a first transformer, a second transformer, a tapped inductance and a feedback cancellation fil... | 02/20/2007 |
| 7154330 | Stability compensation for adjustable gain amplifier Stability compensation for an amplifier with adjustable gain is provided via adjustable capacitance coupled to an input of a gain element within the amplifier. Gain of the amplifier is adjusted by an adjustable resistance coupled between the input and output of the ... | 12/26/2006 |
| 7139327 | Digital pre-distortion of input signals for reducing spurious emissions in communication networks Pre-distortion, whose magnitude—and preferably phase—are frequency-dependent, is applied to an input signal in order to reduce spurious emissions resulting from subsequent amplification of the signal. In preferred embodiments, the pre-distortion technique of the... | 11/21/2006 |
| 7138576 | Sound system and method for creating a sound event based on a modeled sound field A sound system and method for modeling a sound field generated by a sound source and creating a sound event based on the modeled sound field is disclosed. The system and method captures a sound field over an enclosing surface, models the sound field and enables repr... | 11/21/2006 |
| 7135920 | Method and circuit for facilitating control of AC coupling in an amplifier circuit A method and circuit for facilitating control of the AC coupling for addressing input offset in an amplifier circuit are provided. In accordance with an exemplary embodiment, a control circuit comprises a pair of resistive networks coupled together through a capacit... | 11/14/2006 |
| 7126415 | Switched-capacitor circuits with reduced finite-gain effect Operational amplifier circuits (20, 30) including error capacitors (C3, C13) for storing finite gain effect error voltages for correction of output voltages of the circuits (20, 30), are disclosed. The circuits (20, 30) are ope... | 10/24/2006 |
| 7113028 | Method and arrangement for calibrating an active filter The invention relates to a calibration method and a calibration arrangement for an active filter intended to be used especially in portable radio apparatus. The filter (100) according to the invention is an active RC filter and it is integrated except for one... | 09/26/2006 |
| 7098926 | Trapping area creating method, trapping area creating apparatus, and trapping area creating program storage medium A trapping area creating method in which an image represented in form of a combination of polygons is divided into a plurality of image areas by a straight line passing through vertexes of the polygons. The propriety of trapping is decided for each pair of image are... | 08/29/2006 |
| 7085387 | Sound system and method for capturing and reproducing sounds originating from a plurality of sound sources A sound system for capturing and reproducing sounds produced by a plurality of sound sources. The system comprises a device for receiving sounds produced by the plurality of sound sources and converting the separately received sounds to a plurality of separate audio... | 08/01/2006 |
| 7078965 | Servo balancing among driver devices A method and apparatus for reducing imbalances among the outputs of a plurality of driver devices connected in a parallel configuration to drive a common load. One driver is designated as the master, and suitable servo circuitry is provided to each of the other slav... | 07/18/2006 |
