Celebrity Inventors
Mark Twain (Samuel L. Clemens) received Patent No. 121,992 for "An Improvement in Adjustable and Detachable Straps for Garments." He later received two more patents: one for a self-pasting scrapbook and one for a game to help players remember important historical dates.
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| Number | Title | Issue Date |
| 7876152 | High-impedance level-shifting amplifier capable of handling input signals with a voltage magnitude that exceeds a supply voltage A level-shifting amplifier is provided for level-shifting an input signal with a voltage magnitude that exceeds a supply voltage of the amplifier. In operation, the amplifier has an input impedance of greater than 100 MOhms. ... | 01/25/2011 |
| 7733174 | Feedback controlled power limiting for signal amplifiers An apparatus is provided. The apparatus includes an amplifier, differential amplifiers, and FETs. The amplifier has an intermediate node and an output node, and the amplifier is adapted to receive an audio signal. Each differential amplifier amplifies the difference... | 06/08/2010 |
| 7511572 | High-impedance level-shifting amplifier capable of handling input signals with a voltage magnitude that exceeds a supply voltage A level-shifting amplifier is provided for level-shifting an input signal with a voltage magnitude that exceeds a supply voltage of the amplifier. In operation, the amplifier has an input impedance of greater than 100 MOhms. ... | 03/31/2009 |
| 7492221 | Power conversion regulator with exponentiating feedback loop A feedback control loop around a gain element controls the output signal of said gain element responsive to an input or reference signal, and is additionally responsive to a non-linear feedback signal. The feedback loop of this invention comprises computation means ... | 02/17/2009 |
| 7385446 | High-impedance level-shifting amplifier capable of handling input signals with a voltage magnitude that exceeds a supply voltage A level-shifting amplifier is provided for level-shifting an input signal with a voltage magnitude that exceeds a supply voltage of the amplifier. In operation, the amplifier has an input impedance of greater than 100M Ohms. ... | 06/10/2008 |
| 7358818 | Optical receiver for an optical communication The present invention provides an optical receiver operable for optical signals each having different transmission speed. The optical receiver includes a light-receiving device, a pre-amplifier, a main amplifier, and a control circuit. The pre-amplifier, may be a tr... | 04/15/2008 |
| 7332971 | Multi-gigabit/s transimpedance amplifier for optical networks A Gigabit/s transimpedance amplifier system includes a forward-path amplifier section with a very large bandwidth and an overall frequency-selective feedback section which is active only from DC to low frequencies. The forward-path of the amplifier comprises a regul... | 02/19/2008 |
| 7317351 | Low noise amplifier A low noise amplifier (LNA) is discussed. In implementations, a LNA may include a feedback section coupled to a transistor. The feedback section may have a resistive portion including a buffer and a resistor. A capacitor may be connected in parallel with the resisto... | 01/08/2008 |
| 7297917 | Readout technique for increasing or maintaining dynamic range in image sensors The apparatus and method provide a readout technique and circuit for increasing or maintaining dynamic range of an image sensor. The readout technique and circuit process each pixel individually based on the magnitude of the readout signal. The circuit includes a ga... | 11/20/2007 |
| 7256648 | Variable feedback circuits and methods In one embodiment, the present invention includes a circuit comprising an amplifier having an input terminal, an output terminal, a positive supply voltage, and a negative supply voltage. The amplifier is configured to have a first gain. A variable feedback circuit ... | 08/14/2007 |
| 7245890 | High frequency variable gain amplification device, control device, high frequency variable gain frequency-conversion device, and communication device A high frequency variable gain amplification device 100 includes: a feedback circuit 103 capable of changing a feedback impedance to adjust the gain of an amplifier 101 in accordance with a control signal from a control device 200; and a ... | 07/17/2007 |
| 7227246 | Matching circuits on optoelectronic devices An apparatus comprises a first substrate and a second substrate. The first substrate includes an optoelectronic device and a matching circuit. The second substrate includes a driver circuit. A frequency response of the optoelectronic device is changed by the matchin... | 06/05/2007 |
| 7205845 | Amplifier circuit for converting the current signal from an optical receiving element into a voltage signal An amplifier circuit for converting the current signal from an optical receiving element into a voltage signal. The amplifier circuit includes a transimpedance amplifier having a differential amplifier and a feedback resistor, a first adjustable resistor which is co... | 04/17/2007 |
| 7173487 | Power amplification circuit and communication device using the same A power amplification circuit, and a communication device using the same, which are capable of suppressing gain decreases of a power amplifier due to increases in input signal power in a state near the saturation operation, capable of reducing its size, and low in d... | 02/06/2007 |
| 7126420 | R.F. output power control An R.F. power amplifier circuit comprising a power control loop is described. The power control loop includes an R.F. power amplifier having a power control input and a power supply input as well as at least one feedback path coupled between the power control input ... | 10/24/2006 |
| 7095277 | Method and arrangement for a power amplifier The present invention relates to an arrangement and a method for amplifying high frequency RF signals having amplitude and phase variations. The objective problem of the present invention is to provide an efficient power amplifier for amplifying high frequency RF si... | 08/22/2006 |
| 7088393 | Output-compensated buffers with source-follower input structure, methods of operating same, and image capture devices using same An output-compensated buffer includes a buffer circuit that receives an input signal and produces an output signal responsive thereto at an output terminal, the buffer circuit including an input source-follower circuit that receives the input signal. A feedback circ... | 08/08/2006 |
| 7061313 | Dual feedback linear amplifier A dual feedback topology imparts stability to a multistage linear amplifier, particularly by improving overall amplifier phase margin at higher signal frequencies. With dual feedback, an inner feedback loop is closed around the first amplifier stage, which stage is ... | 06/13/2006 |
| 7046080 | Signal processing circuit A signal processing circuit comprises a difference stage for receiving an input signal to be processed and a feedback signal taken from an output signal of the circuit. The difference stage generates a difference signal corresponding to the difference between the in... | 05/16/2006 |
| 7030702 | Optical receiver with wide dynamic range transimpedance amplifier An optical component, such as an optical receiver, is provided that includes a detector configured to receive a signal from an optical fiber and to communicate with a translationl module of the optical component. A transimpedance amplifier of the optical component i... | 04/18/2006 |
| 7002407 | Delay mismatched feed forward amplifier system using penalties and floors for control A delay mismatched feed forward amplifier system employing a control system and method using floors and penalties is disclosed. The disclosed control system and method allows the second loop phase adjuster setting to be offset in a repeatable and controlled manner. ... | 02/21/2006 |
| 6998916 | Feed forward amplifier system using penalties and floors for optimal control A feed forward amplifier employing a new adaptive controller and method is disclosed. The controller aligns both a gain adjuster and phase adjuster of a first cancellation loop. The phase adjuster may be controlled following a standard approach. However, the gain ad... | 02/14/2006 |
| 6970123 | Inductorless architecture for a switching amplifier A switching circuit for generating first and second output signals for differentially driving a load is described. The switching circuit is operable to enforce a minimum pulse width on each of the first and second output signals. The second output signal substantial... | 11/29/2005 |
| 6960754 | Photoelectric current and voltage converting circuit A photoelectric current and voltage converting circuit converts a photo current Ipd generated by the input to photo diode into a voltage Va by a feedback resistor connected to an inverting input and an output of an amplifier, and compares the output voltage Va with ... | 11/01/2005 |
| 6956195 | Photoelectric current and voltage converting circuit A photoelectric current and voltage converting circuit includes a light receiving element, an amplifier, a feedback resistor, an offset resistor, a constant current source, and a comparator. A feedback resistor is connected between the input and the output of the am... | 10/18/2005 |
| 6934470 | Measurement of optical power in optical fiber networks Systems and methods for the measurement of optical power in optical fiber are disclosed. The optical signal is converted to an electrical signal, which is then converted to a digital output code that indicates the relative strength of the optical signal in terms of ... | 08/23/2005 |
| 6903594 | Capacitor-free leaky integrator A leaky integrator is formed from a capacitor-free, non-linear delay resistor having a parasitic capacitance and a capacitor-free amplifier. The amplifier utilizes utilize the parasitic capacitance of the delay resistor to provide differing time constants for the ri... | 06/07/2005 |
| 6900698 | Negative feedback amplifier with electrostatic discharge protection circuit A negative feedback amplifier which alleviates reduction in band width and effectively protects an amplifier from electrostatic discharge (ESD). A node is provided at the midpoint of a feedback resistor connected between an output terminal and an input terminal of a... | 05/31/2005 |
| 6876255 | Linear amplifier using non-linear CMOS capacitors The invention provides an amplifier circuit made by digital CMOS processes, the amplifier circuit comprising a main operational amplifier with at least one input and at least one output and a feedback loop including a non-linear gateoxide capacitor, wherein a voltag... | 04/05/2005 |
| 6873207 | Power amplification circuit and communication device using the same A power amplification circuit, and a communication device using the same, which are capable of suppressing gain decreases of a power amplifier due to increases in input signal power in a state near the saturation operation, capable of reducing its size, and low in d... | 03/29/2005 |
| 6847263 | Optical receiver with wide dynamic range transimpedance amplifier An optical component is provided that includes a detector configured to transmit an input current to a transimpedance amplifier that includes an automatic transimpedance gain control and DC cancellation control feedback circuit having variable impedance circuitry. O... | 01/25/2005 |
| 6841771 | Optical coupling device and light-receiving circuit of same A light-receiving circuit of an optical coupling device may include a dummy photodiode arranged in a vicinity of a photodiode. The dummy photodiode and photodiode may convert received optical signals to photoelectric current. Amplified photoelectric current outputs ... | 01/11/2005 |
| 6838936 | Low-noise amplifier device having negative feedback via a controlled current source, and method of using the amplifier device The amplifier device contains a first amplifier element having a first input and a first output. The first output is fed back via a negative feedback path to the input. The negative feedback path contains a controlled current source which brings about a reduction in... | 01/04/2005 |
| 6816010 | Transimpedance amplifier Disclosed is a transimpedance amplifier comprising a multistage amplifier and a feedback circuit coupled between a single ended input terminal and one of a plurality of differential output terminals of the multistage amplifier. The feedback circuit may control an in... | 11/09/2004 |
| 6812788 | Amplifying circuit In signal sources having a high impedance, typically a capacitive “signal source” such as capacitor-microphone capsules, it is common practice to use amplifier circuits that include means for coupling signals and determining operating points in addition to the a... | 11/02/2004 |
| 6809589 | Low voltage large swing/high linearity analog buffer with servo amplifier and feedback loop An analog buffer with low harmonic distortion and low power supply voltage buffers a signal with wide voltage swing. The lower output voltage swing is increased, by adding a voltage level shifter to the feedback path of a servo. The upper output voltage swing is inc... | 10/26/2004 |
| 6778021 | Wide dynamic range transimpedance amplifier with a controlled low frequency cutoff at high optical power A wide dynamic range transimpedance amplifier with a low cut off frequency at high optical power. An automatic transimpedance gain control and DC cancellation control feedback circuit includes variable impedance circuitry. An emitter terminal of a first pnp transist... | 08/17/2004 |
| 6771132 | Wide dynamic range transimpedance amplifier with a controlled low frequency cutoff at high optical power A wide dynamic range transimpedance amplifier with a low cut off frequency at high optical power. An automatic transimpedance gain control and DC cancellation control feedback circuit includes variable impedance circuitry including a pnp transistor that is connected... | 08/03/2004 |
| 6720826 | Transimpedance amplifier A transimpedance amplifier system includes a first gain stage to receive an input signal. A second gain stage is coupled to the first gain stage to provide a first output. A first passive feedback element is coupled in parallel with the second gain stage. A general ... | 04/13/2004 |
| 6693487 | Signal processing circuit for floating signal sources using positive feedback A signal processing circuit using positive feedback while keeping the open loop gain of the circuit less than 1 to avoid oscillation. The circuit includes a floating signal source, a low gain amplifier, a feedback element, and a second stage circuit. The ... | 02/17/2004 |
