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| Number | Title | Issue Date |
| 8183924 | Output stage with adaptive bias control An input stage receives a differential input signal at first and second input nodes and provides a differential output current at first and second output nodes. The differential output current includes a component taken from the input nodes through first and second ... | 05/22/2012 |
| 8018285 | Step variable gain amplifier Disclosed is a step variable gain amplifier for linearly amplifying a signal received from an antenna. The step variable gain amplifier includes: an amplification unit for converting and amplifying a voltage component of a received signal into a current voltage acco... | 09/13/2011 |
| 7973603 | Low-noise amplifier suitable for use in a television receiver A low-noise amplifier includes a first resistor that receives a first signal of a differential input signal, and a second resistor that receives a second signal of the differential input signal. The amplifier includes a first transconductance device coupled to the f... | 07/05/2011 |
| 7915956 | Vector modulator having attenuators with continuous input steering Variable attenuation systems having continuous input steering may be used to implement vector or quadrature modulators and vector multipliers. Discrete implementations of attenuators with continuous input steering may have two outputs which may be cross-connected to... | 03/29/2011 |
| 7821341 | Gain control device and amplifier using the same Provided are a gain control device and an amplifier using the gain control device. The gain control device includes a first input resistance unit having a first variable resistor whose resistance is linearly variable and a first fixed resistor respectively receiving... | 10/26/2010 |
| 7795979 | Automatic gain control circuit and low noise amplifying circuit By connecting an antenna damping circuit (4) and a bypass switch (5) in series and connecting the series circuit and an LNA (3) in parallel, it is possible to inhibit a generation of a signal path for connecting the bypass switch (5) to t... | 09/14/2010 |
| 7782139 | Input stage An input stage receives a differential input signal at first and second input nodes and provides a differential output current at first and second output nodes. The differential output current includes a component taken from the input nodes through first and second ... | 08/24/2010 |
| 7737785 | Amplifier circuit with adjustable amplification An amplifier circuit has an amplifier element having an amplifier element input and an amplifier element input impedance, an amplification adjuster adapted to adjust an amplification of the amplifier element, an amplifier circuit input coupled to the amplifier eleme... | 06/15/2010 |
| 7714657 | Low noise amplifier gain controlled scheme An amplifier includes an amplifier module coupled to an input node, and an attenuating module. The attenuating module includes an attenuation resistor coupled to the input node, and an impedance compensation module coupled to the input node. The impedance compensati... | 05/11/2010 |
| 7714658 | Method and system for variable-gain amplifier Method for a variable-gain amplifier (VGA). A plurality of attenuator nodes is serially connected via a first set of resistors between adjacent attenuator nodes to form an attenuator ladder and coupled to an AC input of the variable-gain amplifier. Each of the atten... | 05/11/2010 |
| 7710201 | Power amplifier circuit, control method thereof and control program thereof A power amplifier circuit includes a first variable gain amplifier for amplifying an input signal, a second variable gain amplifier for amplifying an output signal of the first amplifier, and a control circuit for controlling the gain of the first variable gain ampl... | 05/04/2010 |
| 7701292 | Programmable gain amplifier with noise cancellation A wide-band adjustable gain low-noise amplifier (LNA) is disclosed. In various embodiments, the LNA includes a first inverting amplifier configured to generate a first intermediate signal. A first attenuator is configured to receive the first intermediate signal and... | 04/20/2010 |
| 7679447 | Variable gain amplifier circuit and filter circuit This variable gain amplifier is provided with an operational amplifier. The non-inversion input terminal of the operational amplifier is connected to a reference potential. A feedback resistor is connected between the output terminal and inversion input terminal of ... | 03/16/2010 |
| 7671681 | Gigabit ethernet transceiver with analog front end Circuitry to remove switches from signal paths in integrated circuit programmable gain attenuators. Programmable gain attenuators and programmable gain amplifiers commonly switch between signal levels using semi-conductor switches. Such switches may introduce non-li... | 03/02/2010 |
| 7667542 | Input stage for an amplifier In one embodiment, the present invention includes an amplifier having an input to receive a radio frequency (RF) signal from an output node of a source. An input stage coupled to the amplifier input may include one or more components to aid in processing of incoming... | 02/23/2010 |
| 7649418 | Variable-gain amplifier There is provided a variable-gain amplifier, including two cascode amplifiers and an attenuator. The cascode amplifiers are mutually connected in parallel via the attenuator. ... | 01/19/2010 |
| 7626459 | High frequency amplifier circuit and mobile communication terminal using the same A first FET is inserted in a series position between a signal input terminal and a signal output terminal, while second and third FETs are inserted in a shunt position respectively between the signal input terminal and a ground terminal and between the signal output... | 12/01/2009 |
| 7616060 | Power amplifier An amplifying transistor for amplifying a radio frequency signal between an input terminal and an output terminal. The cathode of a first diode is connected to the input terminal and the anode of a second diode is connected to the output terminal. A matching and att... | 11/10/2009 |
| 7598808 | Gigabit ethernet transceiver with analog front end Circuitry to remove switches from signal paths in integrated circuit programmable gain attenuators. Programmable gain attenuators and programmable gain amplifiers commonly switch between signal levels using semi-conductor switches. Such switches may introduce non-li... | 10/06/2009 |
| 7560989 | Power amplifier with controlled output power The invention includes a power amplifier with an amplifier core including parallel amplifier cells, a replica cell made of one amplifier cell similar to those of the amplifier core, a power controller to select a combination of amplifier cells to activate, a regulat... | 07/14/2009 |
| 7548116 | High-frequency circuit of reduced circuit scale A high-frequency circuit is provided. In the high-frequency circuit, a first PIN diode is provided in a signal line and a second PIN diode is provided between the signal line and ground so that an attenuating circuit is formed. A power supply is applied to one end o... | 06/16/2009 |
| 7504885 | Variable gain amplifier A variable gain amplifier of the present invention connects an input and an output of a first variable gain amplifier circuit to an RF input terminal and an RF output terminal, respectively, connects one terminal of an attenuation circuit is to an RF input terminal,... | 03/17/2009 |
| 7443243 | High frequency amplifier having an attenuator An amplifier for amplifying a reception signal, having an input terminal for inputting the reception signal from an antenna, has a grounded gate transistor of which gate is grounded in a high frequency manner and of which source is connected to the input terminal, a... | 10/28/2008 |
| 7424120 | Method and apparatus for volume control A method and apparatus for generating and controlling volume of a speaker of an appliance is disclosed. The appliance includes an IC chip connected to an amplifier subsystem. The IC chip includes a square-wave audio signal generator, a counter, a register, a compara... | 09/09/2008 |
| 7421255 | Transmission apparatus and mobile communication terminal apparatus An output level of a transmission apparatus 1 is determined, depending on an attenuation amount of an attenuator 30, a gain of one of a high output level amplification section 17 and a low output level amplification section 18, which is u... | 09/02/2008 |
| 7408411 | High linearity programmable gain amplifier using switch Disclosed is a high linearity programmable gain amplifier using a switch, including an attenuating portion for controlling a gain of a signal and an amplifying portion having a first amplifying part and a second amplifying part, for amplifying an input signal and ou... | 08/05/2008 |
| 7382190 | Variable attenuation system having continuous input steering A variable attenuation system includes a steering core that continuously steers a signal to an attenuator having multiple inputs. An embodiment having an attenuator constructed from discrete components continuously interpolates a signal between the individual inputs... | 06/03/2008 |
| 7378881 | Variable gain amplifier circuit Embodiments of a variable gain amplifier circuit are described. In one embodiment, multiple resistor devices are coupled in series to form a string of resistor devices and to receive an input current. A multiple input operational amplifier device has an amplifier ou... | 05/27/2008 |
| 7375587 | Variable-gain amplifier with high linearity as to gain variations A variable-gain amplifier includes an amplifier stage; an attenuating network receiving an input signal; a plurality of transconductance stages, connected between respective nodes of the attenuating network and the amplifier stage, wherein each of the transconductan... | 05/20/2008 |
| 7362178 | Wide dynamic range amplifier gain control Linear wide dynamic range variable gain amplifiers can be configured using a variable gain amplifier having an abbreviated gain control range in combination with a discrete attenuator controlled to select an attenuation from a predetermined set of attenuation values... | 04/22/2008 |
| 7362177 | Interpolator having dual transistor ranks and ratiometric control An interpolator utilizes two ranks of transistors to generate a plurality of interpolator currents within the confines of a low power supply voltage. The first rank of transistors are underdriven, thereby generating a plurality of partially switched currents having ... | 04/22/2008 |
| 7355481 | Amplification circuit and control method of amplification circuit An amplification circuit connected with a lowpass filter, which reduces the time required for compensating the amplification characteristic and starting up at turning on the power supply, and a control method thereof are provided. An amplification circuit 10,... | 04/08/2008 |
| 7355476 | Input stage for an amplifier In one embodiment, the present invention includes an amplifier having an input to receive a radio frequency (RF) signal from an output node of a source. An input stage coupled to the amplifier input may include one or more components to aid in processing of incoming... | 04/08/2008 |
| 7352238 | dB-linear analog variable gain amplifier (VGA) realization system and method A dB-linear variable gain amplifier, a method for creation, and a system includes an amplifier; a pair of resistor arrays operatively connected to the amplifier, wherein each resistor array comprises MOS transistor resistive switches; a differential ramp-generator c... | 04/01/2008 |
| 7345546 | Amplifier circuit and input circuit A disclosed amplifier circuit is capable of changing a gain to amplify an input signal according to a control signal. The amplifier circuit comprises a differential amplifier circuit adapted to receive and amplify the input signal to output the amplified input signa... | 03/18/2008 |
| 7346317 | Dynamic gain and phase compensation for power amplifier load switching Methods and apparatus are provided for gain and phase compensation in a radio frequency (RF) transmitter (108). The RF transmitter (108) has at least one power amplifier (PA) (205) for providing a transmitted signal having a signal power therefr... | 03/18/2008 |
| 7336130 | Attenuator, variable gain amplifier using the same, and electronic equipment An attenuator attenuates input signals and outputs the signals to an amplifier arranged to amplify signals applied to two input terminals. The attenuator includes first and second output terminals to be respectively connected to the two input terminals of the amplif... | 02/26/2008 |
| 7336131 | Gigabit ethernet transceiver with analog front end Circuitry to remove switches from signal paths in integrated circuit programmable gain attenuators. Programmable gain attenuators and programmable gain amplifiers commonly switch between signal levels using semi-conductor switches. Such switches may introduce non-li... | 02/26/2008 |
| 7330072 | Circuit for power amplification A radio frequency (RF) power amplifier, including an external control loop and a protection circuit, which functions to maintain a constant output power during variations in impedance on the RF load. In the external control loop a collector current from an output tr... | 02/12/2008 |
| 7330064 | Geometric ladder circuit with linear-in-dB transfer function A geometric ladder circuit produces a transfer function having substantially uniform steps measured in dB. Where the ladder has a plurality of substantially identical resistor rungs of a first resistance, one stile that is a conductor connecting the rungs, and anoth... | 02/12/2008 |
