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"Transmission of documents via telephone wires is possible in principle, but the apparatus required is so expensive that it will never become a practical proposition."
Dennis Gabor, British physicist
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| Application No. | Application Title | Issue Date |
| 20120126895 | VARIABLE GAIN AMPLIFIER WITH FIXED BANDWIDTH Provided is a variable gain amplifier. The variable gain amplifier includes an operational amplifier, a variable feedback impedance unit, a variable compensation impedance unit, and a variable current source. The variable feedback impedance unit is connected between an ... | 05/24/2012 |
| 20120126894 | DIFFERENTIAL AMPLIFIER A differential amplifier includes first and second current paths, each connected between first and second power supplies (PS) and respectively outputting first and second differential output signals. The first current path includes: first transistor, selectively interco... | 05/24/2012 |
| 20120049957 | OPERATIONAL AMPLIFIER WITH OVERDRIVING CIRCUIT AND METHOD FOR SAME Disclosed is an operational amplifier including an overdriving circuit capable of reaching a target voltage within an operation time by outputting a higher voltage than the target voltage when an RC delay time is greater. The operational amplifier may including an overd... | 03/01/2012 |
| 20120049956 | Amplifiers and related biasing methods and devices Biasing methods and devices for amplifiers are described. The described methods generate bias voltages proportional to the amplifier output voltage to control stress voltages across transistors used within the amplifier.... | 03/01/2012 |
| 20120038421 | WIRELESS COMMUNICATION DEVICE AND SEMICONDUCTOR PACKAGE DEVICE HAVING A POWER AMPLIFIER THEREFOR A semiconductor package device comprises a first amplifier block, at least one further amplifier block, and at least one differential inductance operably coupled between a first plurality of elements of the output of a first active component of the first amplifier block... | 02/16/2012 |
| 20120039136 | CIRCUITS AND METHODS FOR REDUCING NOISE IN THE POWER SUPPLY OF CIRCUITS COUPLED TO A BIDIRECTIONAL BUS Circuits and methods for reducing noise in the power supply of circuits coupled to a bidirectional bus are presented. The circuits and methods are responsive to an idle condition on the bidirectional bus. The control signal is applied to and changes an electrical charac... | 02/16/2012 |
| 20120032932 | SIGNAL DRIVER AND DISPLAY DEVICE Provided is a signal driver including: operational amplifier circuits; a voltage generating unit configured to generate voltage signals; and selecting units configured to select one of the voltage signals, and to output the selected voltage signal as a correction voltag... | 02/09/2012 |
| 20120032831 | ADDER-EMBEDDED DYNAMIC PREAMPLIFIER A method and apparatus for an adder-embedded dynamic preamplifier system with dynamic comparator and current mode adder including differential switches for precharging, a switch for evaluation; and reference, feedfoward input sections. When differential switches are clo... | 02/09/2012 |
| 20120032944 | OPERATIONAL AMPLIFIER CIRCUIT, SIGNAL DRIVER, DISPLAY DEVICE, AND OFFSET VOLTAGE ADJUSTING METHOD Provided is an operational amplifier circuit including a Rail-to-Rail differential amplifier including: first and second differential transistors forming a first differential pair; and third and fourth differential transistors forming a second differential pair, wherein... | 02/09/2012 |
| 20120025912 | DIFFERENTIAL AMPLIFIER CIRCUIT A differential amplifier circuit can reduce consumption current and the circuit size while improving a power supply rejection ratio. The differential amplifier circuit includes a power supply line and an input part that includes an input circuit and an active load. The ... | 02/02/2012 |
| 20120019324 | Amplifier With Improved Input Resistance and Controlled Common Mode An amplifier includes a first pair of transistors (the first pair) that defines a first output, each transistor of the first pair having a gate coupled to a first input terminal; a second pair of transistors (the second pair) that defines a second output, each transisto... | 01/26/2012 |
| 20120019322 | LOW DROPOUT CURRENT SOURCE Disclosed is a low dropout current source that includes a first field effect transistor (FET), a second FET having a drain that is an output for an output voltage and an output current, and a third FET, wherein a gate of the first FET is coupled to both a gate of the se... | 01/26/2012 |
| 20120019321 | LOW PHASE NOISE BUFFER FOR CRYSTAL OSCILLATOR A buffer for converting sinusoidal waves to square waves with reduced phase noise is described herein. The buffer shunts current from the outputs of a differential amplifier during sinusoidal state transition periods at the differential amplifier inputs to increase the ... | 01/26/2012 |
| 20120013403 | AMPLIFIER CIRCUIT An amplifier circuit is configured to be preceded by a single-ended-to-differential translate circuit using a BTL configuration operating at a low voltage and succeeded by amplifiers to amplify output signals VOT and VOB from the single-ended-to-differential translate c... | 01/19/2012 |
| 20120007674 | POWER AMPLIFIER REDUCING GAIN MISMATCH There is provided a power amplifier reducing a gain mismatch in order to reduce a gain mismatch between an N MOS amplifier and a P MOS amplifier by cross-connecting outputs from a two-stage amplification unit in a power amplifier having amplification units with a stacke... | 01/12/2012 |
| 20120007675 | POWER AMPLIFIER A power amplifier is provided. The power amplifier includes a loading circuit, a first stage amplifying circuit, an analog pre-distorter, a loading circuit and a second stage amplifying circuit. The first stage amplifying circuit is coupled to the loading circuit to rec... | 01/12/2012 |
| 20120007676 | DRIVE AMPLIFIER A drive amplifier having improved linearity while being characterized by low current consumption. The drive amplifier includes first and second transistors having a gate to which first and second differential Radio Frequency (RF) voltages are respectively input; a third... | 01/12/2012 |
| 20120001892 | OPERATIONAL AMPLIFIER CIRCUIT, SIGNAL DRIVER, DISPLAY DEVICE, AND OFFSET VOLTAGE ADJUSTING METHOD Provided is an operational amplifier circuit including: a first input terminal; a second input terminal; an output terminal; a differential amplifier that amplifies a potential difference between the first input terminal and the second input terminal, and outputs, to th... | 01/05/2012 |
| 20120001605 | DIFFERENTIAL AMPLIFIER CIRCUIT AND SERIES REGULATOR A differential amplifier circuit including: a differential input stage including a pair of differential MOS transistors, a pair of load elements, and a first constant-current source; an output stage including an output MOS transistor and a second constant-current source... | 01/05/2012 |
| 20120001697 | DIFFERENTIAL AMPLIFIER STAGE WITH INTEGRATED OFFSET CANCELLATION CIRCUIT A differential amplifier stage and method for offset cancellation include an amplifier having an input and an output. An internal offset cancellation circuit has an input for receiving a control signal to control offset cancellation in the amplifier. The offset cancella... | 01/05/2012 |
| 20120001690 | System for Driver Amplifier In an embodiment, a circuit includes a two-stage amplifier and a feedback component. The two stage amplifier consists of an input stage biased at a first power supply voltage, and an output stage biased at a second power supply voltage. The second power supply voltage i... | 01/05/2012 |
| 20110316507 | Multiple-input comparator and power converter Techniques pertaining to multiple-input comparator and power converter designs are disclosed. According to one aspect, the present invention discloses a multiple-input comparator comprising a pair of differential transistors connected by a resister. The gate terminals o... | 12/29/2011 |
| 20110316629 | OFFSET CANCELLATION FOR DIFFERENTIAL CIRCUITS An offset cancellation circuit for canceling an offset voltage in an amplifier is provided herein. The offset cancellation circuit includes a current source configured to provide an offset current, a switching stage comprising first and second switches, and a cascode st... | 12/29/2011 |
| 20110304394 | Variable Gain Amplifier for Low Voltage Applications An integrated communications system. Comprising a substrate having a receiver disposed on the substrate for converting a received signal to an IF signal. Coupled to a VGA for low voltage applications and coupled to the receiver for processing the IF signal. The VGA incl... | 12/15/2011 |
| 20110304392 | AMPLITUDE-STABILIZED ODD ORDER PRE-DISTORTION CIRCUIT An amplitude-stabilized third-order predistortion circuit includes a main cell having a differential input for receiving a differential input voltage, a differential output for providing a differential output voltage, and a load control input for receiving a load contro... | 12/15/2011 |
| 20110304395 | POWER AMPLIFIER Disclosed is a power amplifier. A power amplifier according to an aspect of the invention may include: a first amplification section having a first N metal oxide semiconductor (MOS) amplifier and a second N MOS amplifier connected in a cascode configuration and amplifyi... | 12/15/2011 |
| 20110304393 | CLASS AB OUTPUT STAGES AND AMPLIFIERS INCLUDING CLASS AB OUTPUT STAGES A buffer stage includes a flipped voltage follower and an emitter follower. The flipped voltage follower is connected between a high voltage rail and a low voltage rail and include an input and an output. The emitter follower is also connected between the high voltage r... | 12/15/2011 |
| 20110291873 | DIFFERENTIAL AMPLIFIER AND PIPELINE A/D CONVERTER USING THE SAME In a differential amplifier, input terminals to which a differential input is given are connected to gates of input transistors, respectively. One ends of capacitive devices are connected to sources of the input transistors, respectively. A switching section switches co... | 12/01/2011 |
| 20110291759 | RAIL-TO-RAIL AMPLIFIER A rail-to-rail amplifier includes an NMOS type amplification unit configured to perform an amplification operation on differential input signals in a domain in which DC levels of the differential input signals are higher than a first threshold value, a PMOS type folded-... | 12/01/2011 |
| 20110294446 | Gyrator circuit, wide-band amplifier and radio communication apparatus Disclosed herein is a gyrator circuit, including, a first transconductance amplifier, a capacitor, and a second transconductance amplifier, wherein the differential input terminals of the first transconductance amplifier and the differential output terminals of the seco... | 12/01/2011 |
| 20110291758 | DIFFERENTIAL COMPARATOR CIRCUIT HAVING A WIDE COMMON MODE INPUT RANGE In one embodiment of the invention, a circuit arrangement is provided. The circuit arrangement includes a plurality of differential amplifiers, coupled in parallel, including at least a first differential amplifier and a second differential amplifier. Each differential ... | 12/01/2011 |
| 20110285304 | Error Amplifier and LED Circuit Comprising the Same An error amplifier and a LED circuit comprising the same are provided. The LED circuit comprises an inductor, a group of LEDs and a power MOS connected to the inductor, an error amplifier and a pulse width modulator controlling the gate of the power MOS according to an ... | 11/24/2011 |
| 20110285464 | APPARATUS AND METHOD FOR LOW NOISE AMPLIFICATION Apparatus and methods are disclosed, such as those involving a low noise amplifier. One such apparatus includes a low noise amplifier circuit configured to receive a signal at an input node and to output an amplified signal at an output node. The low noise amplifier cir... | 11/24/2011 |
| 20110285316 | Error Amplifier and LED Circuit Comprising the Same An error amplifier and a LED circuit comprising the same are provided. The LED circuit comprises an inductor, a group of LEDs and a power MOS connected to the inductor, an error amplifier and a pulse width modulator controlling the gate of the power MOS according to an ... | 11/24/2011 |
| 20110279181 | Common-mode feedback circuit A common-mode feedback circuit includes an amplifying circuit, a biasing circuit connected with the amplifying circuit, and a feedback loop connecting the amplifying circuit with the biasing circuit. The feedback loop includes a first field effect transistor M1, ... | 11/17/2011 |
| 20110273230 | CLASS AB OUTPUT STAGE This disclosure describes at least one class AB amplifier output stage circuit arrangement that can operate at low supply voltages, with minimum current generated. Furthermore, at least one class AB amplifier stage circuit arrangement described herein reacts favorably t... | 11/10/2011 |
| 20110273232 | DIFFERENTIAL AMPLIFIER CIRCUIT Provided is a differential amplifier circuit in which an offset voltage is independent from input voltages. A first correction current generation circuit and a second correction current generation circuit are provided and configured to cause the same current as a curren... | 11/10/2011 |
| 20110267139 | 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 circuit... | 11/03/2011 |
| 20110241780 | AMPLIFIER CIRCUIT, SIGNAL PROCESSOR CIRCUIT, AND SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE An amplifier circuit is provided to be switchable between a single end output configuration and a differential output configuration without increasing a circuit area. When first and fourth switches are turned off and a second switch is turned on, a load circuit function... | 10/06/2011 |
| 20110241779 | Front-end equalizer and amplifier circuit A front-end equalizer and amplifier circuit includes two pairs of fully differential pair transistors, wherein the tail currents of one pair of transistors are connected with ground and connected with each other through the capacitive component to realize the connection... | 10/06/2011 |
