Did You Know...
...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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 |
| 8405455 | Amplifier and method for linearizing same An amplifier circuit and method are described for linearizing the gain of a voltage or current feedback amplifier that is non-linear. ... | 03/26/2013 |
| 8115545 | Automatic level control Some embodiments regard a circuit comprising: a high voltage transistor providing a resistance; an amplifier configured to receive a current and to convert the current to a first voltage that is used in a loop creating the current; and an automatic level control cir... | 02/14/2012 |
| 8093944 | Line driver capable of automatic adjustment of output impedance A line driver includes an output terminal set for outputting an output signal, a differential amplifier for amplifying an input signal, a series resistor set coupled between the differential amplifier and the output terminal set, a negative-feedback resistor set cou... | 01/10/2012 |
| 8044718 | Integrated programmable gain amplifier circuit and system including the circuit An integrated programmable gain amplifier circuit that receives at an input an analog signal, circuit including an operational amplifier and a gain setup network comprising resistive elements and selection elements, which may be controlled in order to setup the gain... | 10/25/2011 |
| 8022758 | Impedance matching circuit and method thereof A circuit comprises an amplifier circuit and a trimming circuit. The amplifier circuit includes an operational amplifier. The operational amplifier has a first input configured to receive input signals, and the operational amplifier also has a second input and an am... | 09/20/2011 |
| 8013672 | Programmable gain amplifier and embedded filter There is provided an integrated circuit having a programmable gain amplifier and an embedded filter. The programmable gain amplifier and the filter comprise a gain element having an inverting input for receiving an input and a feedback signal, a non-inverting input ... | 09/06/2011 |
| 8004354 | Automatic level control Some embodiments regard a circuit comprising: a high voltage transistor providing a resistance; an amplifier configured to receive a current and to convert the current to a first voltage that is used in a loop creating the current; and an automatic level control cir... | 08/23/2011 |
| 7973598 | Audio power amplifier and a pre-amplifier thereof An audio power amplifier includes a pre-amplifier, an error amplifier, a comparator, a bridge circuit, and a feedback circuit, in which the gain of the pre-amplifier gradually increases when the audio power amplifier is powered on. The comparator generates a PWM sig... | 07/05/2011 |
| 7952430 | Amplifier circuit, integrated circuit and radio frequency communication unit An amplifier circuit for amplifying a differential input signal includes a first feedback resistance, a second feedback resistance, first transconductance circuitry, and second transconductance circuitry. The first feedback resistance is connected between a first in... | 05/31/2011 |
| 7944292 | Method and apparatus to remove the DC component of a feedback signal A feedback circuit disposed across input and output terminals of an amplifier is adapted so as not inject DC current back into the input terminal of the amplifier. The feedback circuit includes, in part, first and second current sources, a transistor, and a resistiv... | 05/17/2011 |
| 7907008 | Dynamic signal contamination suppression A self-configurable amplifier and method of amplification, including an RF signal level detector having an input connected to an RF signal, and an output configured to produce a control signal responsive to a power level of the RF signal. The control signal is suppl... | 03/15/2011 |
| 7902920 | Amplifier circuit, integrated circuit and radio frequency communication unit An amplifier circuit for amplifying an input signal received at an input node of the amplifier circuit. The amplifier circuit comprises a feedback resistance connected between the input node of the amplifier circuit and an output node of the amplifier circuit. Trans... | 03/08/2011 |
| 7876151 | R/2R programmable gate array Systems and methods to achieve an IC audio volume control requiring minimum silicon area and having an accurate volume control gain setting are disclosed. A resistive element in form of a R/2R ladder is deployed between an output node of an operational amplifier and... | 01/25/2011 |
| 7868694 | Variable resistor array and amplifier circuit A variable resistor array adapted to make a resistance value between a first terminal and a second terminal variable, includes a plurality of resistors connected in series, first through nth MOS transistors selectively connected to the resistors, and first through n... | 01/11/2011 |
| 7843261 | Resistor network for programmable transconductance stage A voltage-to-current converter is provided. The voltage-to-current converter comprises an amplifier, a resistor network, an R-2R network, and switches. The amplifier has a first input node (which is an input signal), a second input node, and an output node. The resi... | 11/30/2010 |
| 7800441 | Feedback amplifier and audio system thererof A feedback amplifier includes an operational amplifier having an input end and an output end. A first resistor is coupled with the input end of the operational amplifier. A second resistor has a first end coupled with the input end of the operational amplifier and a... | 09/21/2010 |
| 7755424 | Operational amplifier with resistance switch crossbar feedback A control circuit includes an operational amplifier having an inverting input, a non-inverting input, and an output, an array of impedance elements including capacitors are connected to the output of the operational amplifier, and a resistance switch crossbar array ... | 07/13/2010 |
| 7701285 | Power amplifiers having improved startup linearization and related operating methods Systems and methods are described for improving the startup linearization of a power amplifier. A bias network is provided to generate a bias signal during amplifier startup, and the amplifier is configured to produce an output signal in response to the input signal... | 04/20/2010 |
| 7696819 | Switched-capacitor variable gain amplifier having high voltage gain linearity Provided is a switched-capacitor variable gain amplifier having high voltage gain linearity. According to the above amplifier, a sampling capacitor is shared and used at a sampling phase and an amplification phase, and thus a voltage gain error caused by capacitor m... | 04/13/2010 |
| 7692486 | Configurable feedback for an amplifier An amplifier is disclosed that includes configurable feedback based on the output of a received signal strength indicator. The feedback may be increased for high received signal levels, and decreased for low received signal levels. In an embodiment, the configurable... | 04/06/2010 |
| 7639076 | Gain controlled amplifier and cascoded gain controlled amplifier based on the same A gain controlled amplifier and a cascoded gain controlled amplifier based on the same are disclosed. The gain controlled amplifier includes an operational amplifier for amplifying an input signal, an input resistor connected to an input terminal of the operational ... | 12/29/2009 |
| 7633337 | Feedback-type variable gain amplifier and method of controlling the same A feedback-type variable gain amplifier including a first field effect transistor, a feedback circuit, and a load circuit. The first field effect transistor receives an input voltage signal through an input node, amplifies the input voltage signal, and outputs the a... | 12/15/2009 |
| 7602239 | Variable gain amplifier circuits A variable gain amplifier circuit has an amplifier, a string of resistors, a plurality of gain switches, a current source, and at least two current switches. A first input terminal of the amplifier receives an input voltage signal. The string of resistors are couple... | 10/13/2009 |
| 7554393 | Signal amplifier A signal amplifier includes a discrete-variable-gain amplifying unit, a gain of which takes a discrete value and changes stepwise, a linear-variable-gain amplifying unit connected in series to the discrete-variable-gain amplifying unit, a gain of which changes conti... | 06/30/2009 |
| 7545209 | Gain adjustment for programmable gain amplifiers A programmable gain amplifier (PGA) circuit includes a gain adjust circuit and a gain select circuit that are both coupled to an output of an amplifier. The gain select circuit completes feedback to the amplifier while the gain adjust circuit is arranged to boost or... | 06/09/2009 |
| 7545210 | Gain adjustment for programmable gain amplifiers A programmable gain amplifier (PGA) circuit includes a gain adjust circuit and a gain select circuit that are both coupled to an output of an amplifier. The gain select circuit completes feedback to the amplifier while the gain adjust circuit is arranged to boost or... | 06/09/2009 |
| 7504880 | Amplifier circuit An amplifier circuit that is less likely to cause an error in a gain and a DC offset voltage and is suitable for reducing a size and power consumption is offered. A first resistor and a second resistor are connected in series between an input terminal and an output ... | 03/17/2009 |
| 7423482 | Circuit configuration having a feedback operational amplifier The present invention relates to a circuit configuration (10) having a feedback operational amplifier (AMP) for amplifying an input signal (Vin) input into the circuit arrangement (10) and outputting the amplified input signal as an output signal (Vout... | 09/09/2008 |
| 7423481 | Amplifier arrangement and amplifying method In one embodiment, an amplifier arrangement includes an amplifier having a first input, a second input and an output, a first resistor network, having a first parallel circuit formed by a first number N of resistors, and a second resistor network, having a first res... | 09/09/2008 |
| 7417499 | Gain controlled amplifier and cascoded gain controlled amplifier based on the same A gain controlled amplifier and a cascoded gain controlled amplifier based on the same are disclosed. The gain controlled amplifier includes an operational amplifier for amplifying an input signal, an input resistor connected to an input terminal of the operational ... | 08/26/2008 |
| 7417500 | Control of an adjustable gain amplifier A method of controlling an adjustable gain of an amplifier is disclosed. The method includes setting an output of a replica amplifier to be equivalent to a precision reference with a control loop, summing an adjustable offset voltage into the control loop, adjusting... | 08/26/2008 |
| 7414476 | Sensor interface circuitry having adjustable gain and Q, and method for adjusting sensor interface circuitry gain and Q A sensor interface filter having adjustable gain and Q is provided. The sensor interface includes a first operational amplifier coupled to gain circuitry, a gain stage, and a resistor. The gain circuitry and gain stage are electrically coupled to each other. The gai... | 08/19/2008 |
| 7391260 | Variable gain amplifier and variable gain amplifier module An analog variable gain amplifier (VGA) adjusting a signal level of a mobile communication system is provided. More particularly, design of a VGA using an operational transconductance amplifier (OTA) having a wide linear input/output range is disclosed. The VGA incl... | 06/24/2008 |
| 7388428 | Power amplifier with controllable feedback loop The present invention relates to a power amplifier for amplifying an electronic input signal (51) and a multi-band capable frontend with such power amplifier. The power amplifier comprises an amplifier transistor stage (1) having an input (52) a... | 06/17/2008 |
| 7375584 | Gain adjustment method, gain adjustment circuit, and optical disc device having same gain adjustment circuit A gain adjustment circuit includes a gain varying device for varying the gain of an input signal; and a detection device for detecting a variable output signal of the gain varying device, wherein the detection output signal of the detection device is fed back to the... | 05/20/2008 |
| 7372329 | Method and apparatus to remove the DC component of a feedback signal A feedback circuit disposed across input and output terminals of an amplifier is adapted so as not inject DC current back into the input terminal of the amplifier. The feedback circuit includes, in part, first and second current sources, a transistor, and a resistiv... | 05/13/2008 |
| 7368987 | Circuit configuration having a feedback operational amplifier The present invention relates to a circuit configuration (10) having a feedback operational amplifier (AMP) for amplifying an input signal (Vin) input into the circuit arrangement (10) and outputting the amplified input signal as an output signal (Vout... | 05/06/2008 |
| 7365597 | 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 ... | 04/29/2008 |
| 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 |
| 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 |
