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8183916 |
Non-inverting amplifier and voltage supply circuit including the same
A non-inverting amplifier includes an operational amplifier, an input resistor, and a feedback resistor. The operational amplifier amplifies and outputs a difference between an input voltage and a...
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8179200 |
Amplifier circuit and light receiving amplifier circuit using the same
An amplifier circuit includes an amplifier unit that amplifies a signal received by an input terminal and outputs the amplified signal to an output terminal, a feedback capacitor that is connected...
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8131232 |
Method and apparatus for antenna tuning
A method for tuning a transmitter in order to improve impedance matching to an antenna or to intermediate radio frequency stages uses an error detector that senses a deviation of the amplitude or...
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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...
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8111097 |
Device with reconfigurable continuous and discrete time functionality
A programmable system includes a programmable analog device including an operational amplifier to generate an output voltage based on input voltages at terminals of the operational amplifier. The...
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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...
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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...
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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...
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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...
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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...
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7999780 |
Drive circuit containing amplifier circuit
An amplifier circuit includes an operational amplifier having first and second input nodes and one output node which is connected to a data line for which a pixel is provided; a feedback circuit...
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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...
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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...
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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...
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7917114 |
DC cancellation circuit
The present invention relates to a DC offset canceling circuit. In one aspect of the invention, a DC offset canceling circuit with independently configurable gain and roll-off frequency is...
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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...
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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...
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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...
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7869770 |
Apparatus, methods and articles of manufacture for a multi-band switch
A single-die multi-band switch includes a plurality of transmitter ports and a plurality of receiver ports, any one of which is selected to be connected to an antenna port. At least some of these...
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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...
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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...
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7843266 |
Amplifier for improving electrostatic discharge characteristic
An amplifier for improving an electrostatic discharge (ESD) characteristic includes an operational amplifier, a first resistor circuit, a first fuse box, a second resistor circuit, and a second...
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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...
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7777565 |
Differential amplification circuit and manufacturing method thereof
A differential amplification circuit and a method corrects an offset voltage derived from a variance in resistances. With first and second input terminals brought to the same potential and set to a...
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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...
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7746260 |
Multiplying digital-to-analog converter for high speed and low supply voltage
A multiplying digital-to-analog converter includes an operational amplifier (OP-amp) operated under a first power supply voltage and a second power supply voltage; an OP-amp input switch block...
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7737775 |
Low-noise DC offset calibration circuit and related receiver stage
A receiver stage has an operational amplifier, a feedback resistor coupled between an output of the operational amplifier and an input of the operational amplifier, and a DC offset calibration...
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7719362 |
Programmable-gain amplifier systems to facilitate low-noise, low-distortion volume control
Programmable-gain amplifier systems are provided that are particularly suited for reducing degrading audio effects such as zipper noise. In one embodiment, these systems switchably couple an...
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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...
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7701284 |
Line driver capable of automatically adjusting output impedance
A line driver includes: a differential amplifier for amplifying an input signal to generate an output signal; first and second series resistors coupled respectively to output terminals of the...
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7702119 |
Multi-input gain control circuit
A method and apparatus for selecting and mixing electronic signals. The circuit has an operational amplifier and two or more ganged, tapped-resistors in which the tap divides the resistance into a...
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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...
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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...
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7652537 |
Amplifier with programmable input impedance
One embodiment of the invention includes an amplifier system. The amplifier system comprises an amplifier stage configured to receive an input signal at an amplifier input and to provide an...
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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,...
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7639074 |
Linear programmable switch-capacitance gain amplifier
A linear programmable switch-capacitance gain amplifier (PGA) is described. The PGA divides the dB-gain curve into several parts by the concept of piece-wise linearity, and then simultaneously...
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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...
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7605659 |
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...
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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...
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7595693 |
System and method for providing a configurable inductor less multi-stage low-noise amplifier
In accordance with a particular embodiment of the present invention, an apparatus is offered that includes a configurable feedback low noise amplifier (LNA) connected to a common source connected...
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7564310 |
Amplifier for improving electrostatic discharge characteristic
An amplifier for improving an electrostatic discharge (ESD) characteristic includes an operational amplifier, a first resistor circuit, a first fuse box, a second resistor circuit, and a second...
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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...
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7538604 |
Amplifier feedback switch configuration with improved PSRR
A circuit including a first sensitive node, a first component connected between the first sensitive node and a first terminal of a first switch, said first switch controlled by a first control...
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7515882 |
Apparatus, methods and articles of manufacture for a multi-band switch
The invention is directed to a multi-band switch having a transmitter switching section with a plurality of transmission ports, and a receiver switching section with a plurality of receiver ports,...
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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...
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7495514 |
Low noise amplifier
A low noise amplifier including a first-stage signal amplifier, a second-stage signal amplifier and a gain control unit is disclosed. The first-stage signal amplifier is for receiving an input...
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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...
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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...
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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,...
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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...
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