Famous Patents
British merchant Peter Durand invented the tin can in 1810.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7538617 | Class AB amplifier circuit with combined quiescent current and common mode control It is an object of the present invention to provide an amplifier circuit that supplies a differential output signal (Voutp−Voutn) with a stable common mode potential (½×(Voutp+Voutn)) and a stable amplification characteristic. An essential feature of the inventi... | 05/26/2009 |
| 7432764 | Push-pull amplifier with transformational negative feedback The push-pull amplifier with transformational negative feedback is provided for amplification of variable electrical signals. It includes a signal input and a signal output, a transformational negative feedback connected with the signal input and the signal output a... | 10/07/2008 |
| 7368992 | Load-invariant amplifier A push-pull amplifier having low output impedance and low crossover distortion is provided. A least one of a current through a sourcing current path of an output stage and a current through a sinking current path of the output stage is determinative of a quiescent c... | 05/06/2008 |
| 7362530 | Amplifier apparatus for use with a sensor An amplifier apparatus for use with a sensor includes: (a) a first and a second amplifying circuit segment coupled with the sensor and cooperating to effect substantially balanced handling of signals received from the sensor; the first amplifying circuit segment inc... | 04/22/2008 |
| 7359686 | Radio-frequency amplifier system A device for measuring voltage levels includes a root mean square (RMS) detector. The RMS detector includes a linear multiplier, a log converter, a low-pass filter and a temperature compensator. The linear multiplier multiplies a voltage of an input signal by the vo... | 04/15/2008 |
| 7348850 | Electronic circuit for amplification of a bipolar signal Consistent with an example embodiment, there is an electronic circuit for amplification of bipolar symmetric current signals. The electronic circuit has a pair of complimentary current mirrors. Depending on the polarity of the bipolar current signal one or the curre... | 03/25/2008 |
| 7336120 | Circuit and method for boosting output current The circuit has an output stage comprising a current source and a current sink. The circuit also has a comparison stage operable to compare a current mirrored from the current source with a current mirrored from the current sink to determine a difference therebetwee... | 02/26/2008 |
| 7321752 | Linear amplification arrangement with non-linear amplifier element for a mobile radio device A system and method to optimize the efficiency of an amplifier device is provided by the including a non-linear amplifier in a mobile radio device. A phase displaced signal in relation to the input signal is respectively produced in the amplifier device with a non-l... | 01/22/2008 |
| 7319310 | Regulated power supply unit An improved power supply unit includes a DC power source having a positive terminal and a negative terminal, and a voltage regulating circuit that includes a plurality of elements coupled in series between the positive and negative terminals of the DC power source t... | 01/15/2008 |
| 7301399 | Class AB CMOS output circuit equipped with CMOS circuit operating by predetermined operating current In a class AB CMOS output circuit provided with a CMOS circuit including first P and N channel transistors and operating by a predetermined operating current Io, a replica circuit is formed on a semiconductor substrate of the CMOS circuit, and includes a ... | 11/27/2007 |
| 7277136 | Adaptive bandwidth control in a kinescope amplifier A method for controlling dissipation in a video amplifier for a display signal. The method comprises the steps of setting a first current for establishing a first gain bandwidth product in the video amplifier. Generating a control signal in accordance with a slew ra... | 10/02/2007 |
| 7265628 | Margin tracking cascode current mirror system and method A margin tracking cascode current mirror system including a current mirror circuit having a current source device having a predetermined operating voltage for providing a current to a load, a cascode circuit interconnected between the current mirror and the load for... | 09/04/2007 |
| 7250791 | Current feedback amplifiers Current feedback amplifiers circuits that generate common mode (CM) and/or differential mode (DM) currents are provided herein. This description is not intended to be a complete description of, or limit the scope of, the invention. Other features, aspects, and objec... | 07/31/2007 |
| 7242250 | Power amplifier A power amplifier includes an input circuit, three power supply lines with voltages successively decreasing in an order of first, second and third power supply lines, a push-side driving circuit and a pull-side driving circuit which receive control signals from the ... | 07/10/2007 |
| 7218175 | Dynamic feedback linearization An apparatus comprising an amplifier comprising at least one amplifier transistor, a threshold detection network and a bypass capacitor. The amplifier may be configured to generate an output signal at a collector in response to an input signal received at a base. Th... | 05/15/2007 |
| 7202645 | Regulated power supply unit An improved power supply unit includes a DC power source having a positive terminal and a negative terminal, and a voltage regulating circuit that includes a plurality of elements coupled in series between the positive and negative terminals of the DC power source t... | 04/10/2007 |
| 7199777 | Liquid crystal display and driving method thereof A liquid crystal display is provided, which includes: a liquid crystal panel including a gate line, a data line, and a pixel including a switching element connected to the gate line and the data line; a gate driver applying a gate signal for controlling the switchin... | 04/03/2007 |
| 7164317 | Apparatus and method for a low-voltage class AB amplifier with split cascode An op amp is arranged for low-voltage, rail-to-rail operation with a class AB output. The op amp includes a transconductance input stage, a folded cascode middle stage that includes a split cascode, a high-side driver, a low-side driver, a sampling circuit, and a sp... | 01/16/2007 |
| 7132859 | Common-mode current feedback amplifiers Amplifier circuits that generate CM currents are provided. Amplifier circuits that generator DM currents are also provided. Fully differential current feedback amplifier circuits with separate CM and DM inputs are also provided. Such amplifier circuits combine the b... | 11/07/2006 |
| 7132860 | Differential-mode current feedback amplifiers Amplifier circuits that generate CM currents are provided. Amplifier circuits that generator DM currents are also provided. Fully differential current feedback amplifier circuits with separate CM and DM inputs are also provided. Such amplifier circuits combine the b... | 11/07/2006 |
| 7129872 | Audio signal analog-to-digital converter utilizing a transformed-based input circuit An apparatus for converting an input analog audio signal into digital form including an analog-to-digital converter. An amplifier circuit and step-down transformer provide an interface for the input analog audio signal to the analog-to-digital converter. The step-do... | 10/31/2006 |
| 7126345 | Integrated circuit capable of reduced error calibration A method according to one embodiment may include generating, by an integrated circuit including calibration controller circuitry including a comparator, at least one reference voltage. The method of this embodiment may also include calibrating, by the calibration co... | 10/24/2006 |
| 7119611 | On-chip calibrated source termination for voltage mode driver and method of calibration thereof On-chip calibrated source termination for voltage mode driver. An amplifier is disclosed having an internal amplifier with a first output and a second output, the first output interfaced to a non-inverting input through an interface. The second output is coupled to ... | 10/10/2006 |
| 7116132 | Current feedback amplifiers with separate common-mode and differential-mode inputs Amplifier circuits that generate CM currents are provided. Amplifier circuits that generator DM currents are also provided. Fully differential current feedback amplifier circuits with separate CM and DM inputs are also provided. Such amplifier circuits combine the b... | 10/03/2006 |
| 7093054 | Method of transferring signals between a TTL microcontroller and a RS232 device A switching transistor is placed between a serial port of a RS232 device and a parallel port of a TTL microcontroller. Selective activation of the switching transistor permits a high voltage signal to be transmitted from the power supply rail of the TTL microcontrol... | 08/15/2006 |
| 7088182 | Class AB output stage circuit with stable quiescent current A class-AB output stage circuit is configured with controllable reference voltages for providing stable quiescent current. An exemplary output stage circuit comprises one or more control circuits, such as feedback loops, configured to control and/or adjust the refer... | 08/08/2006 |
| 7088179 | Single-ended input, differential output low noise amplifier An amplifier has an input terminal to receive an input signal. The amplifier includes a first gain stage comprising a pair of input transistors and a second gain stage to drive an output stage. The output stage provides inverting and non-inverting differential outpu... | 08/08/2006 |
| 7064945 | Capacitive load driving circuit and liquid crystal display An output circuit may include a power supply terminal, a ground terminal, and an output terminal connected to a capacitive load. Depending on the state of a load control input signal, the output circuit performs selectively a charging-current supplying operation of ... | 06/20/2006 |
| 7061740 | System and method for protecting an audio amplifier output stage power transistor A system and method for protecting an output transistor in an audio amplifier output stage includes a protection circuit that protects the output transistor from excessive currents and voltages, and does not interfere with the normal operation of the output transist... | 06/13/2006 |
| 7031127 | Short circuit protection Output current of an amplifier is limited by clamping the voltage at the gate of one or more of the transistors in the output stage. A drive signal is provided to the gate of a p-type transistor in an example output stage. Another p-type transistor is activated in a... | 04/18/2006 |
| 7030701 | Transimpedance amplification apparatus with source follower structure A transimpedance amplification apparatus includes a signal source for generating a current signal, a source follower stage, a common source stage and a shunt feedback resistor. The source follower stage having a source follower structure receives the current signal ... | 04/18/2006 |
| 7020452 | Actively matched center-tapped marchand balanced mixer An apparatus comprising an amplifier circuit, a tuning circuit and a mixer circuit. The amplifier circuit may be configured to generate an output signal at a first node in response to an input signal received through a second node. A tuning circuit may be (i) couple... | 03/28/2006 |
| 7009541 | Input common-mode voltage feedback circuit for continuous-time sigma-delta analog-to-digital converter A novel circuit is used to monitor the common-mode voltage at the summing junctions of the first integrator in a continuous-time ΣΔ ADC, wherein the circuit produces a control voltage which adjusts the quiescent current of the feedback DAC to compensate for any co... | 03/07/2006 |
| 7005921 | Common-mode feedback circuit A common-mode feedback circuit is provided for fully-differential operational amplifier stages of a multistage amplifier. A first stage of the circuit establishes a substantially constant current output level for a feedback generating stage of the circuit. An exempl... | 02/28/2006 |
| 6992611 | DC-coupled wideband signal converters Signal converters are provided that accurately process dc-coupled source signals in the presence of different predetermined voltage and current source requirements. Processing structures are described that satisfy these requirements while providing accurate control ... | 01/31/2006 |
| 6980384 | Extended position error signal for analog servo disk drive A system and method of extending the position error signal for a disk drive storage system using two digital-to-analog converters in a summing junction, including a typical A-B signal and a track error signal scaled to match a gain of the A-B signal. A track error i... | 12/27/2005 |
| 6970044 | Audio signal amplifier circuit and electronic apparatus having the same The present invention is provided with a first, a second and a third differential amplifier which operate at a source voltage with respect to a reference voltage or a voltage between these; an output stage having a first and a second transistor driven complimentaril... | 11/29/2005 |
| 6954105 | Disk drive and error amplifier therefor and related methods An amplifier may include an output stage including first and second output transistors, and a biasing stage for generating first and second biasing voltages at control terminals of the first and second output transistors, respectively, based upon a supply voltage an... | 10/11/2005 |
| 6952130 | Compensation of offset drift with temperature for operational amplifiers A method and apparatus for compensating for offset and drift of offset in an amplifier circuit having metal oxide semiconductor transistors in an input stage thereof and including a node responsive to a bias to change the offset of the amplifier circuit. In one embo... | 10/04/2005 |
| 6933784 | Output stage for high gain and low distortion operational amplifier A class-AB MOS output stage that provides higher gain and significantly lower distortion. The class-AB MOS output stage includes a PMOS output transistor and an NMOS output transistor coupled between positive and negative supply voltages such that the MOS output tra... | 08/23/2005 |
